National Hydro 70 Triplex Mower Owner's Manual
Below you will find brief information for Hydro 70. This triplex mower boasts a 70" cutting width, adjustable cutting height (1/2" to 2"), and a powerful Briggs & Stratton Vanguard engine. Features include a variable displacement hydraulic pump, Timken tapered roller bearings, and alloy steel blades. Learn about assembly, maintenance, and troubleshooting in this comprehensive manual.
Advertisement
Advertisement
HYDRO 70" TRIPLEX
OWNER'S MANUAL
Includes Assembly, Maintenance &
Parts Lists
For Serial Numbers 1586 & Up
NATIONAL MOWER CO.
HYD70OM-8/99
700 Raymond Ave., P.O. Box 14299, St. Paul, Minnesota 55114-0299, U.S.A.
Phone (651) 646-4079 Fax (651) 646-2887
2
DECLARATION OF CONFORMITY
according to Directive 89/392/EEC
We
NATIONAL MOWER COMPANY
..............................................................................................................................................................
(Name of supplier)
700 Raymond Avenue, St. Paul, Minnesota 55114 U.S.A.
..............................................................................................................................................................
(Full address of the manufacturerauthorized representative in the community must also give the business name and address of the manufacturer) declare under our sole responsibility, that the product
NATIONAL HYDRO 70" TRIPLEX MOWER
(Make and model) to which this declaration relates corresponds to the relevant basic safety and health requirements of the
Directive 89/392/EEC, (if applicable) and to the requirements of other relevant Directives:
EN292-1&2--EN294--EN349
..............................................................................................................................................................
(Title and/or number and date of issue of the other Directives)
(If applicable)
For the relevant implementation of the safety and health requirements mentioned in the directives, the following standard(s) and/or technical specification(s) has (have) been respected:
ANSI B71.4
..............................................................................................................................................................
(Title and/or number and date of issue of standard(s) and/or technical specification(s))
8/1/99
..............................................................................................................................................................
(Place and date of issue) (Name, function and signature of the authorized person)
HY70OM-8/99
IMPORTANT
National Mower Safe Operation Practices
For Riding Mowers
1. Know control functions and how to stop quickly. READ THE OWNERS MANUAL.
2. Do not allow children to operate the mower. Do not allow adults to operate the mower without proper instruction.
3. Do not carry passengers. Keep children and pets at a safe distance from an operating mower.
4. Clear the work place of objects which might be picked up by the blades and thrown.
5. To start engine, operator must be seated, reel control must be disengaged and foot control must be in neutral.
6. Take all possible precautions when leaving the mower unattended, such as shifting into neutral, stopping the engine and removing the ignition key.
7. Do not stop or start suddenly when going uphill or downhill. Use extreme caution when mowing on slopes.
8. Reduce travel speed on slopes and in sharp turns to prevent tipping or loss of control. Use extreme caution when changing direction on slopes.
9. Watch for holes in the terrain and other hidden hazards.
10.
Watch for dangerous traffic when crossing or near roadways.
11. Never direct the discharge of material from operating reels toward bystanders nor allow anyone near the mower during operation.
12. Handle gasoline with CAUTION - it is highly flammable.
a. Use an approved gasoline container.
b. Never fill the fuel tank indoors. Wipe spilled gas immediately.
c. Open garage doors to allow ventilation if engine is run inside-exhaust fumes are dangerous. Do not run engine in any enclosed area.
13. Keep the mower in good operating condition. Make sure that all safety switches are operating properly and all safety guards are in place at all times, except during servicing.
14. Keep all nuts, bolts and screws tight to be sure that the mower is in a safe working condition.
15. Never store the mower, with gasoline in the tank, inside a building where the fumes could reach an open flame or spark. Allow the engine to cool before storing in any enclosure.
16. Keep the engine free of grass, leaves or excessive grease to reduce a fire hazard.
17. The mower and reels should be stopped and inspected for damage after striking a foreign object. The damage should be repaired before restarting and operating the mower.
18. Do not change the engine governor settings or over speed the engine.
19. Proceed as follows when mowing.
a. Mow only in the daylight or in good artificial light.
b. Never make a cutting height adjustment while the engine (motor) is running.
c. Shut the engine (motor) off when removing grass or unclogging reels.
WARNING California, USA residents are required by law (CA PRC 4442 & CA H & SC 13005) to equip their engines with spark arresters when operating in flammable vegitation. Arresters must be obtained from your engine dealer and are not available from National Mower Company.
3
TABLE OF CONTENTS
Declaration Of Conformity ............................................................................. 2
Safe Operating Practices .............................................................................. 3
Introduction ................................................................................................... 5
Receipt of Shipment ...................................................................................... 5
Specifications ............................................................................................6-9
Engine Specifications ............................................................................ 6
Transmission .......................................................................................... 6
Vehicle Specifications ............................................................................ 6
Battery ................................................................................................... 6
Mower Specifications ............................................................................. 6
Weight and Dimensions ......................................................................... 6
Lubricants .............................................................................................. 6
Disposal Numbers .................................................................................. 7
Noise Emission and Vibration ................................................................. 7
Decals .................................................................................................7-8
Assembly Instructions .............................................................................. 9-10
General Information ......................................................................... 11-12
Engine.................................................................................................. 11
Traction Drive Train .............................................................................. 11
Reel Drive ............................................................................................ 11
Ignition Switch ...................................................................................... 11
Hour meter ........................................................................................... 11
Ammeter............................................................................................... 11
Reel Control ......................................................................................... 11
Choke .................................................................................................. 12
Throttle Lever ....................................................................................... 12
Traction Pedal ...................................................................................... 12
Mow and Lift Treadle ............................................................................ 12
Free Wheeling Valve ............................................................................ 12
Drop/Lift Needle Valve .......................................................................... 12
Interlock Switches ................................................................................ 12
Operation .................................................................................................... 13
Adjustments ................................................................................................. 13
Traction Pedal ...................................................................................... 13
Reel Control Clutch ........................................................................ 13, 14
Seat Switch .......................................................................................... 14
Height of Cut ........................................................................................ 14
Reel to Bedknife ................................................................................... 15
Reel End Play ...................................................................................... 15
Backlapping Procedure .................................................................. 15, 16
Grinding Procedure .............................................................................. 16
Maintenance ............................................................................................... 17
General ................................................................................................ 17
Assembly and Disassembly .................................................................. 17
Battery ........................................................................................... 17, 18
Charging a Battery ............................................................................... 18
Bed Knife Replacement ........................................................................ 18
Fuel filter .............................................................................................. 18
Engine.................................................................................................. 18
Electrical System ................................................................................. 18
Hydraulic Hoses ................................................................................... 19
Hydraulic Oil......................................................................................... 19
Hydraulic Oil Filter ................................................................................ 20
Handle Bar Removal ............................................................................. 20
Jumper Cables ..................................................................................... 20
4
HY70OM-8/99
1INTRODUCTION
Lubrication ........................................................................................... 20
Painting ................................................................................................ 20
Belt Replacement ........................................................................... 20, 21
Coupling Alignment .............................................................................. 21
Storage ....................................................................................................... 22
General Instructions ............................................................................. 22
Engine.................................................................................................. 22
Battery ................................................................................................. 22
Tractor ................................................................................................. 22
Tires ..................................................................................................... 22
Starting After Storage ........................................................................... 22
Trouble Shooting Guide ............................................................................... 23
Engine Will Not Start ............................................................................ 23
Tractor Will Not Move ........................................................................... 23
Reel Not Turning................................................................................... 23
Reel Will Not Cut .................................................................................. 23
Lubrication ..................................................................................... 24, 25
Electrical Schematic............................................................................. 26
Parts List and Ordering Information............................................................. 27
Tank and Rear Fork Assembly ....................................................... 28, 29
Steering Tower Assembly ............................................................... 30, 31
Engine and Footrest Assembly ....................................................... 32, 33
Traction Pedal and Pump Assembly ............................................... 34, 35
Lift Arm and Drive Assembly .......................................................... 36, 37
Front Cutting Unit Assembly ........................................................... 38, 39
Rear Cutting Unit Assembly ............................................................ 40, 41
Hydraulic Hose and Line Assembly ................................................ 42, 43
Hydraulic Fitting Assembly ............................................................. 44, 45
Basket Assembly .................................................................................. 46
Belt Too ............................................................................................... l46
Height Of Cut Bar ................................................................................. 47
Pump ................................................................................................... 47
Wheel Motor......................................................................................... 48
Lift Valve .............................................................................................. 48
Lift Cylinder .......................................................................................... 49
Front Roller Scraper Kit ........................................................................ 49
Rear Roller Scraper Kit ........................................................................ 50
Valve Block .......................................................................................... 50
Warranty ..................................................................................................... 51
This manual has been prepared by National Mower
Company as an aid to users for assembly, maintenance, adjustment and ordering replacement parts. Additional information will gladly be furnished by calling or writing
National Mower Company.
Please furnish us with the Model Number, Serial
Number and Date of Purchase when contacting us about your machine. Designations of right, left, front and rear are used as if the operator was sitting in the mower seat.
2RECEIPT OF SHIPMENT
Carefully inspect your machine and crate for damage that could have occured during shipment. If damages or shortages are noted, have the transportation companys representative note this on the bill of lading.
NOTE
Claims for shipping damages must be noted by the consignee at the point of destination and filed with the transportation company that delivers the shipment.
5
3SPECIFICATIONS
3.1ENGINE SPECIFICATIONS
TYPE: Twin Cylinder, Air Cooled
ENGINE MODEL: Briggs & Stratton Vanguard
HORSEPOWER: 11.9 kw (16 hp)
COOLING: Ducted air flow
3.2TRANSMISSION
TRACTION DRIVE: Direct coupled variable displacement hydraulic pump with high torque wheel motors.
OIL TANK: ............................. 18.9 L (5 gallon) capacity
3.5MOWER SPECIFICATIONS
NUMBER AND SIZE: 3 25" Reels
REEL DIAMETER: 7" (17.8 cm)
BEARINGS: Timken Tapered Roller
BLADES: Six Alloy Steel Blades
HEIGHT OF CUT: Adjustable: 1/2 to 2" (1.3 cm to
5.08 cm)
OVERALL CUTTING WIDTH: 70" (177.8 cm)
HEIGHT ADJUSTMENT: Roller Screw Adjustment
BEDKNIFE ADJUSTMENT: Screw adjustment of reel to bedknife.
REEL FLOATATION: Front and Rear Roller with Cutting
Unit Center-line Pivot.
3.3VEHICLE SPECIFICATIONS
FUEL TANK: 18.9 L (5 gallon) capacity
WHEELS AND TIRES:
Front: 20-10 x 8.00 Tubeless Turfmate
Rear: 18-8.50 x 8.00 Tubeless Turfmate
TIRE PRESSURE: 10-12 PSI
FRAME: Welded steel construction
MOWING SPEED: 0- 12 K/H (0 - 7.5 MPH)
TRANSPORT SPEED: 12 K/H (7.5 MPH)
REVERSE SPEED: 3 K/H (2 MPH)
CONTROLS:
Foot operated traction pedal for forward and reverse.
Hand operated choke and throttle levers.
Foot operated hydraulic lift with auto start/stop feature.
Hand operated reel engagement lever.
Free-wheeling valve.
3.4BATTERY
TYPE: Group U1 Type GT
NOMINAL VOLTAGE: 12V
DIMENSIONS: L: 7-3/4(19.68 cm) x W: 5-3/16
(13.17 cm) x H: 7-5/16(18.5 cm)
3.6WEIGHT & DIMENSIONS
OVERALL LENGTH: 86-3/8" (219.4 cm)
OVERALL HEIGHT: 44-3/4" (113.6 cm)
WHEEL BASE: 50-3/4" (128.9 cm)
WHEEL TREAD WIDTH: 45" (114.3 cm) (center of tires)
OVERALL WHEEL WIDTH: 55" (139.7 cm)
OVERALL WIDTH: 75" (190.5 cm)
WORKING WEIGHT: 1, 085 lbs. (492 kg)
3.7LUBRICANTS
ENGINE OIL:
Use high-quality detergent oil API (American
Petroleum Institute) service class SF. Select the viscosity based on the air temperature at the time of operation as shown in the table.
Recommended SAE Oil Viscosity Grades
6
HYDRAULIC SYSTEM OIL:
Use ISO GRADE 100 (SAE 30W) Hydraulic Oil
HY70OM-8/99
3.8DISPOSAL NUMBERS
Petrol, Lead Free: ....................... 54104
Engine oil: ................................... 54112
Fiberglass parts: ......................... 57103
Tires: ........................................... 57502
Gear oil: ...................................... 54112
Grease: ....................................... 54202
Plastic tanks: ............................... 57127
3.10TRANSFERS
3.9NOISE EMISSION & VIBRATION
Sound:
Vibration*:
Operator Position, 88 dBA
Sound Power Level (LwA), 106 dBA
Max. Vibration, 57.7 m/s2 RMS
Location, Left Hand
Operating Condition: Engine rpm-3200, Unit stationary
07406
07257
07405
07403
NATIONAL MOWER CO.
700 RAYMOND AVE.
ST. PAUL, MINNESOTA 55114 USA
651-646-4079 FAX 651-646-2887
POWER RATING: 9.7 kW at: 3200 rpm
WEIGHT: 528 kg
07372
07256
07404
7
TRANSFERS, Continued
07408
07409 07407
3.11TRANSFER DESCRIPTION
07406 Do not exceed 25 degree slope. Located on main chassis.
07403 Parking brake on/off. Located on main chassis.
07372 Manufactures identification and specifications. Located on main chassis.
07257 Mowers up/reels off. Located on main chassis.
07256 Mowers down/reels on. Located on main chassis.
07405 Sound level at operators position. Located on main chassis.
07404 Sound power level. Located on main chasis.
07408 Mow pedal operation and vehicle motion pedal operation. Located on main chassis.
07409 Main instrument panel, Three wheel drive unit. Located on main chassis.
07407 Main instrument panel, Two wheel drive unit. Located on main chassis.
8
HY70OM-8/99
4ASSEMBLY INSTRUCTIONS
4.1ASSEMBLY
The Hydro 70 is shipped in two separate crates, one for the tractor and one for the cutting units.
4.2TRACTOR ASSEMBLY
1. Disassemble crating for the tractor carefully to prevent damage to components.
2. Remove the tape holding the keys in the steering shaft. Position the handlebar assembly over the shaft and key securing it with set screws provided it the handle bar.
3. For removal of handle bar see Section 8.12.
4. Remove the tower cover. Refer to section 3.4 for battery specifications. Install the battery on the base inside the tower. Attach the red wire to the positive terminal of the battery and attach the black ground wire to the negative terminal of the battery. Replace and secure the tower cover.
HANDLE BAR
KEY
SEAT
SUPPORT
6. Tires should be checked and if necessary adjusted for proper inflation. Refer to Section 3.3.
7. Check the oil level in the oil tank. Refer to Section 8.10.
8. Check the oil level in the engine. Refer to 3.7 and 5.1.
4.3ASSEMBLY OF REAR CUTTING
UNIT TO TRACTOR
1. Disassemble crating for the cutting units carefully to prevent damage to components.
2. Position the rear cutting unit under the tractor. The rear cutting unit can be identified by the reel guard attached the rear of the cutting unit. Position the cutting unit with the reel pulley on the right side of the tractor.
COVER
5. The seat base is temporally held together for shipment. Remove and discard the fastener securing the seat base to the spring plate. Position the seat slider, which is assembled to the seat, onto the seat base plate and secure with locknuts provided.
Attach the safety switch wires to the switch located under the seat. Wires can be connected to either terminal.
NOTE
Belt tool kit Part# 070008 is available thru National Mowers parts department.
This tool will simplify the assembly of the cutting units.
3. Remove the tie wrap holding the pull arm and spring to the cutting unit. Assemble the pull arm to the tractor using the sleeve and fastener provided.
9
ASSEMBLY OF REAR CUTTING UNIT, Con't.
4. Remove the two top fasteners holding the pivot bracket to the cutting unit and loosen the bottom fastener so the bracket is free to rotate.
5. Align and assemble the spring and pull arm previously attached to the tractor to the pull arm shaft on the cutting unit. Place the belt on the cutting unit pulley.
With the pull arm assembled, rotate the pivot bracket into place using it as a lever arm to compress the spring and reattach with previously removed fasteners.
6. Assemble the pull rod on the left side of the cutting unit to the tractor using fasteners provided.
7. A counterbalance spring has been assembled to the tractor located under the steering tower. Remove the spring bushing from the cutting unit making note of its location. Insert the spring bushing into the spring loop, pull directly down on the spring and reinsert the fastener provided thru the bushing into the hole on the cutting unit.
8. Remove the tie wraps securing the lift chains and attach the chains to the lift arm under the tractor. One chain per side.
9. Remove the tie wrap attaching the cutting unit belts to the tractor. Position the cutting unit in front of the tractor with the pulleys to the inside. Remove the two top fasteners holding the pivot bracket to the cutting.
Place the belt on the cutting unit pulley. Assemble the push arm to the pivot bracket using the washers and snap ring provided. Rotate pivot bracket into place using it as a lever arm to compress the spring and reattach with previously remove fasteners.
10. Attach counterbalance spring and chains to lift bar.
11. Connect link bar between cutting units with fasteners provided.
PUSH ARM LINK BAR
PIVOT
BRACKET
PULL
ROD
FRAME
PIVOT BRACKET
Belt tool, complete with instructions, (below) available through National Mowers Parts Department.
10
PUSH
ARM
SHAFT
PUSH ARM, SPRING
& SLEEVE
PART # 070008
HY70OM-8/99
5GENERAL INFORMATION
5.1ENGINE
Your vehicle is powered by twin cylinder, 4 cycle Briggs & Stratton Vanguard engine which uses unleaded gasoline, 85 octane minimum. DO NOT MIX
OIL WITH GASOLINE! Engine speed is controlled by means of a throttle lever mounted on the left side of console panel.
A separate Engine Manual, prepared by the engine manufacturer is supplied. Study the manual carefully until you are familiar with the maintenance, operation, adjustment and repair of your equipment.
Proper attention to the engine manufacturers directions will assure maximum service life of the engine and highest operating efficiency.
b. Key should be removed when tractor is not in use to prevent unauthorized operation.
c. Refer to section 4.2 in the Hydro 70
Operators Manual for complete starting information.
5.5HOUR METER
The hour meter indicates the number of hours the tractor has been operated. It can be used to keep track of maintenance intervals and the amount of time required to perform various tasks. The hour meter operates whenever the ignition key is in the ON position.
5.2TRACTION DRIVE TRAIN
Power from the engine is transmitted to the variable displacement pump through a drive coupling.
The pump supplies hydraulic fluid to wheel motors. The wheel motors provide the differential action required in turns.
5.6AMMETER
The ammeter indicates the condition of the charging circuit. If the ammeter indicates a negative reading refer to the Briggs and Stratton engine manual.
5.3REEL DRIVE
Power to the reels is transmitted from the engine to a jackshaft mounted under the engine through a spring loaded belt drive. Three separate belts trans-mit the power from the jackshaft to the mowers.
5.4 IGNITION SWITCH
The reel control lever must be in the disengage position and the traction control pedal is in the neutral position before starting engine. Insert key in switch, turn clockwise as far as it will go to start engine, then release.
a. Do not hold key in ON position more than
30 seconds at a time.
5.7REEL CONTROL
The reel control lever must be in the disengaged or back position to start the engine. Placing lever in engaged position will allow reels to run when mowers are lowered.
Never operate the mowers when they are not cutting grass as excessive friction and heat will develop between the bedknife and reel, and damage the cutting edge.
11
5.8CHOKE
When starting a cold engine, pull the choke control out to close the choke plate and allow a richer fuel mixture to enter the engine. After the engine starts, push the choke control about half way in to keep the partially closed. Push the choke control all the way in to open the choke plate for normal operation after the choke plate engine is properly warmed. A warm engine usually requires less choke to start.
The valve is located under the left shield on the front side of the vehicle. With the engine OFF, turn knob to open valve and permit free-wheeling. Freewheeling valve must be closed during normal operation or tractive effort will be severely reduced.
5.9THROTTLE LEVER
Push forward to increase engine speed, pull back to decrease.
5.13DROP/LIFT NEEDLE VALVE
A needle valve is located under the left shield on the front side of the vehicle. By turning the needle valve knob, the speed of drop and raising of the cutting units can be adjusted as desired.
5.10TRACTION PEDAL
The traction pedal operates the forward and reverse direction and speed of the machine. By pushing the toe of the pedal down, the forward speed is increased. By pushing the heel of the pedal down the reverse speed is increased. When the traction pedal is released the machine will slow down and stop.
Familiarize yourself with the instrument panel and the controls. Study the instructions and learn to use the controls correctly. Keep hands and feet away from controls unless you intend to use them.
5.11MOW AND LIFT TREADLE
Depress and hold the down pedal with left foot to lower mowers. Reels will rotate if reel control lever is in
ENGAGED position. Depress and hold the up pedal to raise mowers. Reels will stop if control lever is in
ENGAGED position when mowers are raised.
NOTE
When operating the mow or lift pedal, keep the pedal depressed until the mowers have been completely lowered or raised, and then release the pedal.
5.12FREE-WHEELING VALVE
To permit moving the Hydro 70 without starting the engine, a freewheeling device or tow valve has been provided.
12
3.13 INTERLOCK SWITCHES
There are four interlock switches on your Hydro
70. They are a safety precaution which will allow you to start your mower only when the traction pedal is in neutral, the reel control lever is in the disengaged position and operator is seated on the tractor. If you are able to start your mower with these levers in any other position, adjustment of the switches is required.
1. The neutral start switches are located under the traction control pedal.
2. The reel control lever switch is located on the side of the console and is activated by the reel lever.
3. The seat switch is located under the seat and is activated by the weight of the operator.
HY70OM-8/99
6OPERATION
See Section 4.0 in the National Mower Hydro 70
Operators Manual for unit operation.
7ADJUSTMENTS
7.1ADJUSTMENTS
Read each instruction completely and make sure you understand it before making any adjustment. Follow all the safety precautions.
TRACTION PEDAL
TRACTION PEDAL
SAFETY SWITCHES
THREADED ROD &
ROD END
PUMP CONTROL
To avoid possible serious bodily injury, before making any adjustments or performing maintenance, place all tractor controls in Neutral, engage parking brake, fully lower cutting units to the ground, turn ignition switch Off and remove key.
BEARING
7.2TRACTION PEDAL
ADJUSTMENT
The Traction pedal is equipped with two safety switches and a neutral centering device. The switches prevent the engine from starting when the pedal is positioned in reverse or forward. The centering device locates neutral positioning of the pump.
Prior to adjusting for creep, elevate the wheels off the ground and support the vehicle securely. Any adjustments should be done while the hydraulic oil is warm.
To adjust the creep of the drive wheels loosen the fastener attaching the ball bearing to the control arm and move the bearing within the slot to achieve neutral.
Once the traction pedal has been adjusted, the switches may have to be re-adjusted by moving the switches in the range of the slots provided in the switch bracket. Adjust switches so that unit cannot be started unless pedal is in the neutral position.
7.3REEL CONTROL CLUTCH
ADJUSTMENT
The reel control clutch idler is preset at the factory.
However, if adjustment is necessary, the position of the idler can be adjusted with the clevis on the clutch rod.
Loosen the jam nut that locks the clevis to the clutch rod and turn the clevis further onto the rod until proper tension is achieved, and re-tighten nut against clevis.
If clevis bottoms out on the threaded rod replace the belts.
CLEVIS
CLUTCH ROD
CLUTCH IDLER
LIFT STRAP
13
REEL CONTROL CLUTCH
ADJUSTMENT, Continued
If clutch idler is restricted from its proper function, (engaging and disengaging reel belt drive), follow these steps. Refer to figure on the previous page.
1. Make sure clutch rod is free from any restriction by moving lever arm back and forth.
2. Loosen mounting bolts for the clutch idler. If the mounting bolts are torqued too tight, it restricts idler movement.
3. Loosen the pivot bolt between the idler arm and lift strap. Any restriction at this point will cause restriction with the idler arm.
After loosening adjusting nuts on each side of the reel assembly, place a gauge plate under the bedknife and roller measuring the distance between bedknife cutting edge and the rollers. Adjust front and rear rollers equally and insure that the bottom of the bedknife is parallel with the ground. After height of cut setting is determined, re-tighten roller adjustment nuts.
NOTE
A height of cut tool, Part #070009 (shown below), complete with instructions, is available through the National Mower
Parts Department.
ROLLER ADJUSTERS
BED BAR
BED
KNIFE
7.4 SEAT SWITCH ADJUSTMENT
The HYDRO 70 has a safety switch mounted directly to the seat bottom. The switch requires no adjustment.
If wires should become disconnected from the seat switch it prohibits other safety features from working properly.
To avoid possible serious bodily injury, before performing any adjustments, maintenance, or lubrication, place all controls in Neutral, lower the mowers to the ground, engage parking brake, turn ignition switch off and remove key.
7.5HEIGHT OF CUT ADJUSTMENT
The height of cut is variable and adjusted by moving the front and rear roller brackets to the desired height.
It is important to get all rollers adjusted to the same height, keeping the bed knife parallel to the ground, so that there will be uniform cutting on the entire width of the mower. Do not adjust rollers by sight.
BAR
ROUND HEAD
SCREW WING NUT
HEX HEAD
CAPSCREW
INSTRUCTIONS:
1. Preparation of barPosition round head capscrew to desired height of cut. Measure from flat surface of bar to the underside of round head screw. Lock round head screw in position with wing nut.
Position hex head capscrew 1/8 less than desired height of cut. Measure from flat surface of bar to the top of the hex head capscrew. Lock hex head capscrew in position with wing nut.
2. Setting height of cutHook round head screw on top edge of bedknife, and rest hex head capscrew against bedbar.
Adjust front and rear roller adjusters so that the rollers contact bar. Check roller placement for the full length of the cutting unit by moving the bar side to side while still located on the bedknife/bedbar to achieve consistent height of cut the full width of the cutting unit. Lock roller adjusters in place.
14
HY70OM-8/99
7.6 REEL TO BEDKNIFE
ADJUSTMENT
The reel is adjusted to a fixed position bedknife.
This makes a more rugged and stable frame retaining adjustment longer.
To adjust the reel to bedknife contact, turn the hex adjuster on each side of the reel down. Proceed slowly and do not over adjust - about 1/8th of a turn on each side. Do not over tighten. A too tight reel will wear much faster. The reel should wipe or lightly touch the bedknife. By using paper strips held between reel and bedknife, check to see that blades are cutting the paper all the way across.
Use heavy gloves and be careful blades are sharp!
7.7REEL END PLAY ADJUSTMENT
As the reel is used, normal wear of the reel bearings will cause end play. This condition could cause uneven wear to moving parts and uneven cutting of turf.
Test for end play periodically by trying to move the reel from side to side in the frame. If there is any movement, adjust by loosening the locknut on the adjustment body, which is located on the inside right end of the reels and turn adjustment bolt in a half turn or less. Do not overtighten as it would cause excessive bearing wear. Test again for end play, if reel is rotating freely and end play can not be detected, retighten the locking nut on adjustment bolt.
LOCKNUT
& SCREW
7.8 BACKLAPPING PROCEDURE
Back lapping is a very important step in maintaining sharp reel blades on the rear and wing mowers.
Many types of compounds are available for lapping. However, we recommend a good pre- mixed water soluble compound such as Pinhigh. Prices, grit ranges and ordering information are available by calling a toll free phone number 1-800-422-4748. Pre-mixed compound saves the time required to mix, eliminates the waste of abrasive, rinses off easily with water and is available in all grit ranges from coarse to extra fine.
This procedure should be performed when the reel blades and bed knife become slightly rounded and the grass is not cut cleanly with only a slight bed- knife adjustment. After grinding the bedknife and reels, backlapping should be done to establish a perfect match between the bedknife and reel blades.
1. Clean cutting units of any foreign debris and disengage reel clutch.
2. Make sure to adjust the bedknife to the reel so that the bedknife is level with the reel and light contact is maintained.
3. Reels must be run in a reverse direction to be lapped. Remove exterior guards as needed. Attach a back lapping machine (not supplied by National
Mower) to one of the outside reel stub shafts of the front two cutting units, following the instructions furnished by the backlapping machine manufacturer.
NOTE
Some back lapping machines may not rotate all three cutting units simultaneously. If this occurs back the reel adjustment off or disconnect the remaining two cutting units and concentrate on one cutting unit at a time.
4. With reels running, and concentrating on one reel, apply the lapping compound using a 2" or 3" wide brush. Apply the compound evenly to the mowing blades. Adjustment of the reel to bedknife may be required, relap as necessary.
Be extremely careful not to let the brush, your fingers or your clothing get caught in the reels. Use approved safety glasses to protect eyes from flying particles and abrasives.
15
BACKLAPPING PROCEDURE, Continued
5. Stop the reel and examine both bed knife and reel blades to see that the cutting edges are uniformly sharp. If not, gradually tighten hex adjuster and repeat Step 4 on previous page until the proper sharpness results.
6. Rinse off the compound thoroughly with water to remove all abrasive. Check for sharpness and readjust the bed knife if necessary.
7. Check reel adjustment on each mower and adjust if necessary, so that they will cut paper cleanly across the full length of the bed knife when paper is held
90# to the bedknife and pinched when held horizontally.
7.9GRINDING PROCEDURE
Be extremely careful not to let brush, your fingers or your clothing get caught in the reels. Use approved safety glasses to protect tour eyes from flying particles and abrasives.
BACK GRIND IN THE
DIRECTION
OF THE ARROW AT 25 O
16
25 O
Note centerline
POSITION OF REEL
TO THE BLADE
Reels must be ground at 25° in the direction shown by the arrow. Back grind until reel blades are free from roundness, dents and nicks. Spin grind to remove all burrs. All blades must be on the same diameter.
For maximum cutting efficiency, grind bed knife top and front edges at 5° as shown.
GRIND BED KNIFE
AT ANGLES SHOWN
5 O
5 O
HY70OM-8/99
8MAINTENANCE
To avoid possible serious bodily injury, before performing any adjustments, maintenance, or lubrication, place all controls in Neutral, lower the mowers to the ground, engage parking brake, turn ignition switch off and remove key.
8.1GENERAL MAINTENANCE
The long trouble-free life of your machine depends on the maintenance it receives. Set up a maintenance program for your Hydro 70 to cover the following points:
1. Keep tractor and mowers clean.
2. Keep all moving parts properly lubricated.
3. Keep all parts properly adjusted.
4. Inspect for loose, worn or damaged parts
(Fittings and hoses).
5. Keep shields in place at all times.
6. Keep tires properly inflated.
If your inspection reveals worn or damaged parts, replace these parts before operating machine or before actual breakdown occurs.
8.2ASSEMBLY & DISASSEMBLY
Use the illustrations in the Parts Section as reference for the disassembly and assembly of components.
Always maintain relative position of parts when disassembling. Clean and lubricate individual parts and components as required.
8.3BATTERY
1. Make certain the ignition switch is in the Off position and the keys have been removed.
2. Refer to Section 3.4 in this manual for battery specifications.
Always wear protective glasses or goggles and protective clothing when working with batteries. You must follow the battery manufacturers instructions on safety, maintenance and installation procedures.
3. When the battery is being installed or removed, make sure that the positive and negative terminals do not come in contact with metal tractor parts at the same time or severe damage will result.
Always connect the ground (black) cable last and remove it first whenever performing any maintenance.
4. Battery connections must be kept clean and tight at all times. Loose cables will cause eventual battery failure. Keep terminal covers in place.
5. Use soap and water to clean the battery as required.
Care must be taken to prevent soap and water from getting inside the battery.
6. Brighten the terminal contact surfaces with steel wool.
7. Apply a light coat of petroleum jelly or chassis lubricant to terminals and cable ends to prevent corrosion.
8. Tighten cables securely to battery terminals.
To avoid injury from hot, high pressure oil, never disconnect hydraulic hoses with attachments in up position. Never run hands across tubes, hoses or fittings to check for leaks. Hydraulic fluid escaping under pressure can have sufficient force to penetrate skin.
Batteries contain sulfuric acid and generate explosive mixtures of hydrogen and oxygen gases. Keep any device which may cause sparks or flames away from the battery to prevent explosion.
17
8.4CHARGING A BATTERY
1. Remove the battery from the tractor before charging.
2. Be sure charger is Off.
3. Connect charger leads to battery. Connect the positive (+) connector from the charger to the positive battery terminal. Connect the negative () connector of the charger to the negative battery terminal.
To avoid possible injury, stand away from battery when charger is turned on. A damaged battery or a battery with an internal short could explode.
4. Charge the battery using one of the methods shown below. Follow the manufacturers instructions on the charger.
5. If when charging the battery, violent gassing or spewing of electrolyte occurs, or the battery case feels hot (125 F- 52 C), reduce or temporarily halt charging to avoid damaging the battery.
6. Always turn charger to Off before removing a the battery.
MAINTENANCE:
Slow Charge Fast Charge
10 hours @ 5 amps 2-1/2 hours @ 20 amps
5 hours @ 10 amps 1-1/2 hours @ 30 amps
1 hour @ 45 amps
8.5BED KNIFE REPLACEMENT
When the bed knife becomes damaged or too worn to keep sharp, it must be replaced. Design improvements have made bed knife replacement easier with bolt-on construction. Follow the procedure below.
1. The backbar (1), bed knife (2) and fasteners have been assembled at the factory under tension. To ease replacement and prevent misalignment of components, the leading edge of the backbar must be tack welded two or three places before the old fasteners are removed.
2. Remove shoulder nuts (3) and flat head screws (4). If shoulder nuts are badly rusted or corroded, they may have to be cut off and screws driven out to be removed.
3. Clean the bottom surface of the backbar for maximum metal contact with the new bed bar.
4. Fasten the new bed knife to the bottom of the backbar in the position shown (bent edge up). Shoulder of shoulder nuts must be seated firmly in the backbar and screws must be flush with the bottom of the bed knife.
5. Torque shoulder nuts 35 to 40 ft/lbs.
18
8.6FUEL FILTER
Before servicing the fuel filter, thoroughly clean outside of filter housing and fuel hoses, dirt must not be allowed to enter into fuel or fuel system. Refer to the engine manual for specific instructions.
8.7ENGINE
Refer to Engine Manual for manufacturers maintenance recommendations. Change oil and oil filter after the first 25 hours of operation and every 150 hours thereafter.
NOTE
Engine replacement parts should be ordered through your local Briggs & Stratton dealer.
8.8ELECTRICAL SYSTEM
Make certain all terminals and connections are kept clean and properly secured.
1.
Check switches regularly to be sure they are kept clean and operating correctly. See 7.2, 7.3 and
7.4 in the Adjustments section.
2.
Keep wire harness and all individual wires away from moving parts to prevent abrasive wear or potential short circuits.
3.
Exercise extreme care when working with the electrical system.
Tack weld this edge
HY70OM-8/99
8. 9HYDRAULIC HOSES
1. Hydraulic hose and tube lines should be inspected every week to check for cuts, loose connections, kinks and wear.
To avoid serious bodily injury, always lower mowers to the ground, place all controls in Neutral and shut off engine before inspecting hydraulic lines or hoses. Never run hands across tubes, hoses or fittings to check for leaks.
2. Be sure tubes and hoses do not come in contact with other frame parts which could cause abrasive wear. Always replace worn hoses or tubes before operating machine.
a. Assemble nut, sleeves, and tube to fitting body with minimum torque (finger tight) until flare contacts seat on fitting body.
b. For tightening reference, mark a line lengthwise on both the nut and adapter fitting with a marker.
c. Using a wrench, rotate the nut to tighten. Turn the nut the amount shown in the chart following. The line will show which fittings have been tightened and how much.
d. On hoses with O ring fittings, make sure O rings are clean and hose fittings are properly seated before tightening.
3. Hold the fixed portion of the hose coupling with one wrench; use a second wrench to tighten or loosen the hose nut. This will prevent damage to the fitting seal. When tightening a hose, do not allow it to twist; hold it in a normal straight portion.
Tube O.D. or Hose I.D.
3/8"
1/2"
5/8"
1"
Rotate No. of Hex Flats
2
2
1-1/2 to 2
3/4 to 1
8.10HYDRAULIC OIL
1. The reservoir should be checked daily for proper level in the sight glass gauge on rear of the oil tank.
Oil level should be seen in the sight glass.
2. Park the tractor on a flat or level surface. Fully lower all cutting units.
3. Oil should be at 60 F to 90 F (16 -32 C), when checking level. Do not check oil level when oil is hot.
4. Drain and replace the hydraulic oil every 500 hours. Use Hydraulic oil as listed in 3.7 of the
Specifications section of this manual.
a. The oil should be changed after a major component failure, or if you notice the presence of water (noted by a cloudy or milky appearance), air (noted by foam), or a rancid odor (indicating excessive heat).
b. Once a year check the breather element in the tank cap and replace if necessary.
5. To drain hydraulic oil tank, remove drain plug from bottom of tank and loosen to remove fill cap on top of tank.
6. Reinstall drain plug and fill hydraulic tank to full level on sight gauge, use only filtered hydraulic oil. The total hydraulic system oil capacity is approximately
5 gallons.
7. Jack up front tires so they spin freely.
8. Start engine: operate the traction pedal and cycle lift cylinder for a minimum of three minutes.
Recheck oil level in sight glass gauge.
19
MAINTENANCE, Continued
8.11HYDRAULIC OIL FILTER
To prevent damage to the hydraulic system, the hydraulic oil filter should be changed after the first 25 hours of operation and every 250 hours thereafter.
1.
Remove the old filter and fill new filter with clean fluid.
2.
Install new filter. Hand tighten only.
3.
Run engine at idle speed with hydrostatic pump in neutral for five minutes.
4.
Check hydraulic oil level and add if necessary.
Frequent checks must be made on the oil level in the hydraulic system. Should the pump run short of oil, immediate and permanent damage will result.
8.12HANDLE BAR REMOVAL
For easy removal of handle bars follow this procedure.
1.
Cut away rubber coating above steering hub.
(Shown in diagram) Clean internal threads as necessary.
2.
Insert 3/8-24NF X 2" hex head capscrew. (Fully threaded if possible).
3.
Loosen set screws attaching handle bars to the steering shaft.
4.
Screw capscrew in until handle bars are removed.
5.
Reinstall handle bars and replace the 2" long capscrew with a 3/8-24NF x 3/8 long capscrew to prevent future rusting of steering hub to shaft.
8.13JUMPER CABLES
Before attempting to jump the battery, check the condition of the battery, check the water level and refer to the battery manufacturers instructions.
1.
Stop the engine on vehicle with good battery.
2.
Connect one jumper cable to positive terminal on good battery. Connect other end of the jumper cable to the positive terminal on the dead battery.
3.
Connect one jumper cable to negative terminal on good battery. Connect other end of negative jumper to ground (frame) of vehicle with dead battery.
8.14LUBRICATION
Refer to Lubrication Section, Pages 24 and
25 of this Maintenance Manual.
8.15PAINTING
For protection and appearance, clean and retouch scratched or worn painted surfaces. National
Mower green and white spray paint cans, in 12-3/4 ounces, are available at your National Mower Equipment
Distributor.
8.16BELT REPLACEMENT
NOTE
To make belt changes easier a belt tool kit is available through National Mowers parts department. (Refer to section 4.3).
Belts should be inspected regularly, worn or damaged belts may cause poor mowing results or disrupt operation. If a belt change is necessary follow these steps.
1.
Remove the mounting bolts securing the pivot bracket on the two front cutting units.
This bracket is spring loaded. Slowly rotate the pivot bracket.
20
HY70OM-8/99
BELT REPLACEMENT, Continued
1, Gently roll the pivot bracket off of the cutting unit.
Now the belts can easily be removed from the reel pulleys.
2. Remove the top two bolts on the rear cutting unit
(right side only) pivot bracket. (Noting this bracket is under spring pressure). Loosen the bottom bolt and use it as a pivot point. Roll back the pivot bracket allowing the spring pressure and belt tension to be released. (Use of a crescent wrench to get extra leverage is very helpful). Remove belt from rear cutting unit pulley.
3. To remove belts from the tractor you must remove the left front cover to access the main engine drive belts. Remove the front belt guide on the engine drive pulley, with clutch disengaged, the two main drive belts and the left wing cutting unit belt, can now be removed.
4. Removal of the right wing and rear cutting unit belts can be done by removing the two capscrews holding the bearing mounting bracket in place.
With capscrews removed rotate the bearing and bracket creating space to remove both belts.
For reinstallation of new belts reverse these steps. Taking care to tighten all mounting fasteners and making sure all belts, pulleys, and pulley scrapers are all in alignment.
8.17COUPLING ALIGNMENT
To prevent coupling failures proper shaft alignment between the pump shaft and engine shaft is required. Following these steps will ensure proper alignment.
1.
Remove flex coupling disk (Part# 591181) from inbetween coupling halves.
2.
Rotate both coupling halves to a vertical position to check up and down alignment.
3.
Loosen the four fasteners mounting the hydraulic motor to the frame.
4.
Rotate the hex adjuster (counter clockwise to raise, clockwise to lower) to achieve the proper height of the hydraulic motor pump shaft. It is recommended to check alignment on the rounded surfaces of the couplings.
5.
Tighten hydraulic pump mounting fasteners.
Recheck alignment.
6.
To adjust forward and back alignment, rotate couplings 90° to a horizontal position and loosen the four fasteners mounting the engine to the frame.
7.
Slide engine forward and back until proper alignment is achieved. Retighten fasteners.
8.
Remount coupling disk. (Use of a thread locking formula is recommended).
COUPLING
HALVES
HEX
ADJUSTER
REMOVE
FASTENERS
ROTATE BEARING
AND BRACKET
FOR BELT REMOVAL
21
9STORAGE
9.1GENERAL INSTRUCTIONS
When you do not plan to use your vehicle for some time, it should be stored in a dry and protected place. Unnecessary exposure to the elements may deteriorate its appearance and shorten the usual service life.
9.2ENGINE
1. Drain the fuel from the fuel tank and carburetor.
2. Operate the engine until the gasoline in the carburetor is completely consumed.
IMPORTANT
Gum will eventually form in the tank, fuel line, and carburetor if the fuel is not drained. Gum in the carburetor jets and passage affects engine starting.
3. While the engine is still warm, drain the oil from the crankcase and refill with fresh oil. Refer to the engine manual for specific instructions.
4. After engine has cooled, remove the spark plugs and put about one tablespoon of SAE 30 oil into the cylinder.
5. Clean exterior of engine. Paint the exposed metal or coat it with a light coating of rust preventative oil.
9.3BATTERY
1. Remove battery and clean it, refer to Manufacturers manual for specific instructions. Also refer to 8.3
and 8.4 in the Maintenance Section of this manual.
2. Maintenance-free batteries should be stored in an upright position in a cool, dry place. Storage above
80° F (26.7°C) greatly increases self-discharge. If wet batteries are discharged, the electrolyte will freeze when stored below 20° F(-7° C).
IMPORTANT
The battery should be checked every 60 to 90 days while in storage, and should be recharged if necessary.
22
9.4TRACTOR
Wash, clean and completely lubricate the tractor. Paint exposed metal with National Mower paint.
9.5TIRES
1.
Before storing the vehicle, clean the tires thoroughly.
2.
Jack up the vehicle so that the load is off the tires.
If it is not jacked up, check the tires at regular intervals and re-inflate as necessary to keep them at the recommended pressure.
3.
Store the vehicle so that tires are protected from the sunlight.
9.6STARTING THE ENGINE
AFTER STORAGE
1.
Check and recharge the battery according to recommendations given by battery manufacturer.
a.Refer to Section 8.3 in this manual.
b.Reinstall the battery.
2.
Check oil level in crankcase and hydraulic oil tank.
3.
Fill the fuel tank with fresh gasoline. Check fuel filter.
4.
Remove the spark plug and wipe dry. Crank the engine (with spark plug removed), using starter, until excess oil has been expelled through the spark plug hole. Replace the plug and connect the ignition lead wires.
5.
Before driving the vehicle, check to make certain that the tires are properly inflated to the proper pressure.
6.
Either move the vehicle outside before starting engine or keep doors and/or windows wide open to provide sufficient ventilation to prevent danger from carbon monoxide gas in the exhaust. Start the engine but do not operate at high speed immediately after starting. Allow time for it to become properly warmed and lubricated.
HY70OM-8/99
10TROUBLE SHOOTING GUIDE
10.1ENGINE WILL NOT START
Check fuel in tank.
Check if fuel is at end of fuel line at carburetor.
If not, clean filter on fuel shutoff on bottom of tank.
If not, replace fuel filter.
Check spark plugs.
Check for spark at spark plug.
Check for foul condition.
Replace spark plug if necessary, refer to Briggs and Stratton engine manual for recommended spark plug number and gap.
Check position of reel engagement lever and traction pedal, both must be in disengaged
(lever) and neutral (pedal) position.
Check electrical wiring and switch operation.
Check positioning of reel control safety switch and traction pedal neutral safety switch. Both must be adjusted to allow current flow from the s terminal to the starter solenoid.
Refer to Page 26 for circuit diagram.
Check for continuity of each safety switch.
Replace switch as required.
Check battery for charge level. Replace or charge if necessary.
Check for corrosion on battery terminals, clean as necessary.
slippage still occurs as a result of belt wear and belt stretch, replace the belt.
Check drive belts between engine and countershaft pulley. If adjustment is necessary, this can be accomplished by adjusting the clevis on the reel engagement lever for more tension on the belts. If clevis needs to be adjusted beyond the thread length available, replace the belt.
10.4REEL WILL NOT CUT
Check reel to bedknife clearance with paper, (common newspaper), the reel should cut the entire length of the bedknife. If adjustment is necessary adjust clearance by turning (equal turns on each side of the reel) hex reel adjusters located on each side of the reel. Turn a 1/8 turn at time, periodically checking with paper.
Inspect condition of the reel and bedknife and service as necessary.
To avoid possible serious injury, before making any adjustments or performing maintenance, place all controls in neutral, fully lower cutting units to the ground, turn ignition switch OFF and remove key.
10.2TRACTOR WILL NOT MOVE
Disengage parking brake.
Check towing valve assuring that the valve is totally closed.
Check linkage from traction pedal to the pump control mechanism to assure complete attachment of all linkages.
10.3REEL NOT TURNING:
Check for debris jammed between reel and bedknife.
Check for proper belt tension. Tensioning on belts for countershaft to reel is non-adjustable. Check the condition of the slider shaft (under spring) of the push and pull arms for free movement, if necessary clean shaft and apply grease to mating surfaces. If
23
11LUBRICATION
24
Grease Items 1 through 9 (use pressure gun) every
40 hours.
Clean fittings and slowly fill until grease begins to seep out.
Apply several drops of SAE 30 oil to all linkage friction points.
Item
7
8
5
6
9
3
4
1
2
Description
Fork pivot bearing
Rear wheel hub bearing
Handle bar shaft pivot
Pivot bearings
Push arm brackets
Reel engagement
Neutral control bearing
Countershaft bearing
Countershaft bearing
No. of Fittings
2
9
1
1
4
1
2
HY70OM-8/99
Grease Items 1 through 7 (use pressure gun) every
40 hours.
Clean fittings and slowly fill until grease begins to seep out.
Item
5
6
7
3
4
1
2
Description No. of Fittings
Reel shaft bearing
Reel to bed knife adjuster
Roller bearing (per cutting unit) 4
Roller adj. bracket (per cutting unit) 4
2
2
Pull arm, rear
Pull arm, front
Pull arm bracket
2
4
4
25
12ELECTRICAL SCHEMATIC
GROUND WIRE
(07104)
REEL CONTROL
SWITCH (#07325)
SEAT
SWITCH
(#07332)
HOUR METER
(#07063)
IGNITION SWITCH
(#07065)
AMMETER
(#07064)
BATTERY
GRD.
Yellow
GRD.
STARTER
SOLENOID
(#07057)
SOLENOID WIRE
(#07384)
TRACTION
PEDAL
SWITCH
(#302533)
30 AMP FUSE
TOGGLE
SWITCH
(#07386)
SOLENOID
VALVE
(#07395)
REGULATOR ANTI AFTER
FIRE
SOLENOID
STOP
SWITCH
ENGINE
STARTER
GROUND
WIRE
(#07385)
SOLENOID
WIRE
(#07383)
26
WIRE HARNESS
(#07328)
STARTER WIRE
(#07104)
NOTE
THIRD WHEEL ASSIST
MODEL ONLY
HY70OM-8/99
PARTS LIST
Note: For your records and future ordering, fill in the following information.
DATE PURCHASED MODEL NO.
SERIAL NO.
ORDERING INFORMATION
When ordering replacement parts, always furnish:
1. Your complete name, address and phone number.
2. Model Number and Serial Number (plate located on the main frame between the oil tank and the fuel tank).
3. Part Number (it is recommended that the correct number be verified with a current Master Price List).
4. The full Description of the part.
5. Quantity desired (quantity shown is the total number of parts contained in the particular view shown).
If the Part Number and the Description of your order do not agree, the Part Number will be used to fill your order.
27
28
HY70OM-8/99
TANK AND REAR FORK ASSEMBLY
Item Part No.
Description Qty.
1
2
3
4
5
11
12
13
302228
302133
302552
302551
SUPPORT, Seat Spring
BASE, Seat, (includes #6)
17
18
19
302162
06130
06131
302043
302068
07318
302067
302069
FORK
SPACER, Rear Wheel
HUB, Rear Wheel
SPACER, Rear Wheel
AXLE, Rear Wheel
1
2
4
4
2
14
15
16
__________________________________________________________________________________________________________________________________________________ 1
1
1
1
1
1
2
6
7
8
9
10
07333
07258
07260
302607
SEAT
CAP, Bearing
CAP, Gas
TANK, Gas (includes #27)
STRAP, Rubber
STRAP, Tank
BASE, Spring
CONE, Bearing
CUP, Bearing
1
1
1
1
___________________________________________________________________________________________________________________________________________________
Item Part No.
Description Qty.
20
21
22
23
24
07355
07101
TANK BASE, Rubber
SLIDE, Seat
2
1
25
26
27
28
29
30
*34
*35
*36
*37
*38
*39
07244
302669
302678
07068
302560
07389
07390
302620
07426
07269
TIRE AND WHEEL ASSEMBLY
OIL TANK ASSEMBLY (with Fittings)
FUEL LINE
VALVE, Fuel Shutoff
FORK
TIRE AND WHEEL ASSEMBLY
MOTOR, Wheel
BRACKET, Fitting
RIM
BOLT, Wheel
1
1
1
1
1
1
1
1
2
1
31
*32
*33
07424
07425
TIRE, Rear (Tire Only)
RIM
1
1
* Three Wheel Drive
30
HY70OM-8/99
STEERING TOWER ASSEMBLY
Item Part No.
Description Qty.
1
2
3
4
5
6
7
8
09114
302566
07241
04012
06030
04073
07364
302205
COVER, Tower
HANDLE BAR
CONTROL, Throttle
KEY, Woodruff
1
1
1
2
___________________________________________________________________________________________________________________________________________________
12
13
BUSHING
CLEVIS AND PIN
CLAMP, Cable
LEVER
SWITCH
ROD, Lever
SWITCH, Ignition
TOWER (includes #5)
1
1
2
1
9
10
07007
200676
GRIP
SPACER
1
1
11
___________________________________________________________________________________________________________________________________________________
14
07325
302208
07065
302041
1
1
1
1
___________________________________________________________________________________________________________________________________________________ 15
16
17
18
19
07249
302070
07346
07347
07348
GROMMET
FRAME
LEVER, Brake
CABLE, Brake, R.H.
CABLE, Brake, L.H.
1
1
1
1
1
Item Part No.
Description Qty.
20
21
22
23
24
302743
04074
TUBE, Steering
END, Rod
1
2
25
26
27
28
29
30
07408
302051
04544
302659
DECAL, Instruction
ARM, Steering
SPRING
SPACER, Spring
34
35
*36
07405
07406
07457
07386
DECAL, LPA
DECAL, Slope
GRIP, Handle Bar
SWITCH, 3 WD
1
1
2
1
1
1
1
1
31
32
33
07407
07353
DECAL, Dash
COVER, Switch
1
1
* Three Wheel Drive
32
HY70OM-8/99
ENGINE AND FOOTREST ASSEMBLY
Item Part No.
Description Qty.
1
2
3
4
5
6
7
8
9
10
11
14
09158
302070
302745
591181
302437
302093
302301
08061
HEATSHIELD
GUIDE, Belt
1
2
12
13
18
19 302065
COVER
FRAME
COUPLER, Pump
DISK, Coupler
KEY
FRONT PLATE, Air Duct
15
16
17
302435
03628
302128
494664
KEY
PULLEY
PIPE, Exhaust
MUFFLER
1
1
FOOTREST, L.H.
1
1
1
1
1
1
1
1
1
Item Part No.
Description Qty.
20
21
22
23
24
302096
302095
SHROUD, L.H.
SHROUD, R.H.
1
1
25
26
27
28
29
30
31
32
33
07262
07257
302064
07261
302557
07360
302623
07430
34
35 302706
36
NON-SKID, L.H.
DECAL, Up
FOOTREST, R.H.
NON-SKID, R.H.
GUARD, Muffler
CLAMP
STOP, Pedal
CLAMP, Muffler, 1-1/8
GUIDE, Hose
ENGINE AND PARTS
1
1
1
1
1
1
1
1
1
1
34
HY70OM-8/99
TRACTION PEDAL AND PUMP ASSEMBLY
Item Part No.
Description Qty.
1
2
3
4
5
6
7
8
9
10
11
13
14
15
16
17
18
09128
07263
07248
07275
302156
07264
07274
302070
07276
07277
07278
07350
07351
07269
07243
19
20 06037
PEDAL, Traction
NON-SKID, Pedal
GROMMET
CYLINDER, Lift
PEDAL, Lift
NON-SKID, Pedal, Left
VALVE, Lift
FRAME
HEAD, Oil Filter
ELEMENT, Oil Filter
CALIPER, R.H.
CALIPER, L.H.
BOLT, Wheel
TIRE & WHEEL ASSEMBLY
BEARING, Thrust
1
1
1
1
1
2
1
1
1
1
1
1
10
2
1
Item Part No.
Description Qty.
21
22
23
24
25
08068
04539
ROD
SPRING
1
1
26
27
28
29
30
31
35
36
37
38
39
40
302479
06129
04069
06126
07394
302624
07425
07427
302855
302884
ARM
BEARING, Ball
KEY
BLOCK, Bearing
BLOCK, 2WD
SPACER
RIM
STEM, Valve
HEX ADJUSTER, Pump
WASHER, Plated
1
4
1
1
1
1
1
6
1
1
32
33
34
302703
07360
BRACKET, Switch
CLAMP, Cable
1
1
* Three Wheel Drive
36
HY70OM-8/99
LIFT ARM AND DRIVE ASSEMBLY
Item Part No.
Description Qty.
1
2
3
4
5
6
7
8
9
10
11
302076
07458
302325
06127
302161
302070
302082
07365
03631
06038
12
13
14
03629
302455
ARM, Lift
CHAIN* Three Wheel Drive (5 Links)
SUPPORT, Bearing
BLOCK, Bearing
STRAP, Lift
FRAME
ARM, Idler
CHAIN
PULLEY, Idler
BEARING, Thrust
PULLEY
BAR, Lift
4
1
1
1
3
6
12
1
1
1
1
1
Item Part No.
Description Qty.
15
16
19
20
21
26
27
28
03630
04012
302227
05073
06125
06032
06124
302114
04073
302702
07265
302611
PULLEY
KEY, Woodruff
SHAFT
SHAFT, Push Arm
BUSHING
BEARING, Flange
1
1
1
2
2
3
3
17
18
BEARING, Pillow Block
BRACKET
CLEVIS AND PIN
ROD, Lift Link
CHAIN (6 Links)
SPACER
2
4
1
1
1
23
24
25
___________________________________________________________________________________________________________________________________________________
* Three Wheel Drive
38
HY70OM-8/99
FRONT CUTTING UNIT ASSEMBLY
Item Part No.
Description Qty.
1
2
3
___________________________________________________________________________________________________________________________________________________
5
6
302840
302841
302827
302826
302336
302360
302601
SIDEPLATE, L.H.
SIDEPLATE, R.H.
BRACKET, Rear Roller, L.H.
BRACKET, Rear Roller, R.H.
SHAFT
SCRAPER, Pulley
SLEEVE, Rubber
1
1
1
1
1
1
1
7
8
9
___________________________________________________________________________________________________________________________________________________ 10
11
12
15
16
17
04077
04071
02644
302639
302171
05072
05080
302846
END, Rod
RING, Snap
WASHER
CROSSLINK
PULL ARM (includes #13)
PLATE, Side, R.H.
PLATE, Side, L.H.
SPACER
SHAFT, Front Roller
ADJUSTER, Roller (Shown)
3
1
2
1
1
13
14 302185
302186
__________________________________________________________________________________________________________________________________________________ 1
1
1
1
2
___________________________________________________________________________________________________________________________________________________
18
19
20
21
22
201802
302310
02109
302504
02641
NUT
BEDKNIFE
SCREW, Bedknife
SPACER
WASHER
8
1
8
17
16
23
24
25
302311
302904
BEDBAR & KNIFE ASSEMBLY
SKIDBAR, R.H. (Shown)
1
1
Item Part No.
Description Qty.
26
302905
302829
SKIDBAR, L.H.
FRAME, Cutting Unit, R.H.
1
1
___________________________________________________________________________________________________________________________________________________
27
28
302491
302738
REEL, 6 Blade
REEL, 8 Blade
1
1
29
30
32
06120
06121
302836
302838
200236
CUP, Bearing
CONE, Bearing
2
2
BRACKET, Rear Roller, L.H.
ADJUSTER, Reel
1
2
33
34
35
36
37
302549
06119
302507
REEL CARRIER, R.H.
BEARING, Roller
ROLLER, Rear (includes #38)
1
4
1
38
39
40
41
42
43
302550
06119
302181
REEL CARRIER, L.H.
BEARING
SHIELD
1
47
48
49
302513
302653
200256
07437
ROLLER (includes No's. 16, 2123, 46
CAP, End
SCREW and NUT
DECAL, Hydro 70
1
2
2
1
4
1
44
45
46
04543
302179
SPRING
CROSSBAR
1
1
40
HY70OM-8/99
CENTER (REAR) CUTTING UNIT ASSEMBLY
Item Part No.
Description Qty.
1
2
3
4
5
302820
302840
302738
06120
CROSSBAR
SIDE PLATE, L.H.
REEL, 8 Blade
CONE, Bearing
1
1
1
2
___________________________________________________________________________________________________________________________________________________
6
7
8
9
10
201437
302838
WASHER, Backup
BRACKET, Rear Roller
1
1
11
12
13
04077
302639
END, Rod
ROD, Pull
2
1
14
15
16
302830
302311
FRAME, Cutting Unit
BEDBAR & KNIFE ASSEMBLY
1
1
17
18
19
05080
201802
SHAFT, Roller
NUT, Bedbar
1
8
20
21
22
302310
302504
BEDKNIFE
SPACER
1
17
23
24
25
02272
04541
302255
06031
NUT, Roller Shaft
SPRING
SLEEVE
BUSHING
2
1
26
27 02644 WASHER
1
1
3
Item Part No.
Description Qty.
28
29
30
31
32
33
34
35
38
302836
03606
302847
06119
200236
BRACKET, Rear Roller
PULLEY
ADJUSTER, Roller
BEARING
ADJUSTER, Reel
SPRING, Reel Adjuster
___________________________________________________________________________________________________________________________________________________
PLATE, Side, R.H.
2
1
1
1
___________________________________________________________________________________________________________________________________________________
37
39
40
41
302248
302511
302360
201383
04542
05075
302507
05078
302181
ARM, Pull (includes #47)
PLATE, Side
SCRAPER, Pulley
CAPSCREW
ADJUSTER, Hex Reel
ROLLER, Rear (includes #40)
PIN, Roller
SHIELD
1
1
1
1
2
___________________________________________________________________________________________________________________________________________________
43
45
46
302401
302658
04544
302273
302272
GUARD, Rear
___________________________________________________________________________________________________________________________________________________
302653
302513
302680
302681
200256
SLEEVE
SPRING
CARRIER, Reel, R.H.
CARRIER, Reel, L.H.
BUSHING
BELT, BX-38
CAP, End
ROLLER (includes #15, 19-21, 49)
REEL GUARD ASSEMBLY, R.H.
REEL GUARD ASSEMBLY, L.H.
SCREW AND NUT
1
1
47
48
50
51
06035
03930
49
___________________________________________________________________________________________________________________________________________________
52
53
1
1
2
2
1
2
1
1
1
1
1
2
2
1
1
44
__________________________________________________________________________________________________________________________________________________
WHEEL
MOTOR
WHEEL
MOTOR
FILTER
PUMP
LIFT
CYLINDER
LIFT
VALVE
NEEDLE
VALVE
TANK
REAR
WHEEL
MOTOR
HYDRAULIC HOSE AND LINE ASSEMBLY
Item Part No.
Description Qty.
Item Part No.
Description Qty.
1
2
3
4
5
6
7
8
9
10
11
07303
07309
07310
07299
07306
07311
07307
07300
07375
07376
07301
HOSE, Motor
LINE, Pump to Tee
LINE, Pump to Tee
HOSE, Case Drain, R.H.
LINE, Case Drain
LINE, Pump to Filter
LINE, Tank to Pump
HOSE, Suction
LINE, Pump to Valve
LINE, Filter to Valve
HOSE, Lift Cylinder
1
1
1
1
1
1
3
1
1
1
1
16
17
*18
*19
*20
*21
*22
12
13
14
15
07304
07308
07302
07377
07378
07305
07380
07379
07382
07381
302688
HOSE, Lift Cylinder
LINE, Case Drain
HOSE, Case Drain, L.H.
LINE, Tee to Block
LINE, Tee to Block
HOSE, Motor
LINE, Block to Bulkhead
LINE, Block to Bulkhead
HOSE, Bulkhead to Bulkhead
HOSE, Rear Motor
SLEEVE, Hoses
1
1
1
1
1
1
1
1
2
2
1
* Three Wheel Drive
PUMP
WHEEL
MOTOR
FILTER
WHEEL
MOTOR
LIFT
CYLINDER
LIFT
VALVE
NEEDLE
VALVE
TANK
REAR
WHEEL
MOTOR
HYDRAULIC FITTING ASSEMBLY
Item Part No.
Description Qty.
1
2
3
4
5
9
10
11
07283
07284
07297
07285
07286
FITTING, Reducer
FITTING, Straight
FITTING, 45°
FITTING, Straight
FITTING, 90°
12
13
14
15
16
07287
07288
07369
07356
07290
07341
07317
07316
07279
FITTING, 90°
FITTING, Straight
FITTING, 45°
FITTING, 90°
FITTING, 90°
FITTING, Plug
GAUGE, Sight
SCREEN, Tank
VALVE, Needle
2
1
1
1
1
1
1
1
1
2
4
2
2
2
6
7
8
___________________________________________________________________________________________________________________________________________________
Item Part No.
Description Qty.
17
18
19
20
21
07388
07275
MOTOR, Wheel
CYLINDER, Lift
2
2
22
23
24
25
26
27
28
*29
*30
07293
07292
07278
07298
07282
07357
07393
07392
*31
*32 07390
NIPPLE
FITTING, 90°
CARTRIDGE, Filter
FITTING, Tee
FITTING, Tee
FITTING, 90°
FITTING, Straight Bulkhead
FITTING, 90° Bulkhead
MOTOR, Wheel
3
1
1
2
1
1
1
2
1
* Three Wheel Drive
Item Part No.
BASKET ASSEMBLY Kit No. 070001
Description Qty.
1
2
07337
302526
BASKET, Rear
HANGER
1
1
________________________________________________________________________________________________________________________________________
4 302527 BRACKET, Basket 1
5 302528 BRACKET, Basket 1
_______________________________________________________________________________________________________________________________________
7 302529 BRACKET, Basket 1
8 07338 BASKET, Front 2
________________________________________________________________________________________________________________________________________
10 302525 HANGER 1
11 07499 BUSHING 6
12 04080 COTTER, Hairpin 1
BELT TOOL KIT KIt No. 070008
46
HY70OM-8/99
Item Part No.
1
2
02129
02128
HEIGHT OF CUT BAR Kit No. 070009
Description
SCREW, Machine
CAPSCREW, Hex Head
Qty.
1
1
Item Part No.
Description Qty.
4
5
302654
02282
DECAL
NUT, Wing
1
2
___________________________________________________________________________________________________________________________________________________
Item Part No.
1
2
302760
302761
Description
SNAP RING
RING, Retaining
PUMP Part No. 07272
Qty.
2
1
Item Part No.
Description Qty.
4
5
302762
302759
SEAL
SHAFT, Input
1
1
___________________________________________________________________________________________________________________________________________________
47
Item Part No.
1
2
302718
302715
WHEEL MOTOR Part No's. 07273, 07388 07390
Description
KEY
BEARING HOUSING
Qty.
1
1
Item Part No.
Description Qty.
4
5
302717
302714
NUT, Hex
SEAL KIT
1
1
___________________________________________________________________________________________________________________________________________________
Item Part No.
1
2
302725
302726
Description
SHIM, Mylar
O'RING KIT
LIFT VALVE Part No. 07274
Qty.
AR
1
Item Part No.
4
5
6
302728
302729
Description
RETAINER
O'RING
48
Qty.
2
1
HY70OM-8/99
Item Part No.
1
2
302709
302711
LIFT CYLINDER Part No. 07275
Description
SHAFT WELDMENT
SEAL KIT
Qty.
1
1
Item Part No.
4
5
302712
302713
Description
PISTON
LOCK NUT, 1/2"13UNC
Qty.
1
1
Item Part No.
1
2
3
302693
02012
02402
FRONT ROLLER SCRAPER KIT Part No. 070005
Description
HANGER
CAPSCREW, Hex Head
WASHER, Flat
Qty.
6
12
12
Item Part No.
4
5
02302
302692
Description
WASHER, Lock
SCRAPER, Roller
Qty.
12
3
49
REAR ROLLER SCRAPER KIT Part No. 070013
Item Part No.
1
2
302864
02228
Description
ADJUSTER, Rear Roller
NUT, Jam
Qty.
3
12
Item Part No.
3
4
09169
302865
Description
CABLE, Roller Scraper
ADJUSTER, Rear Roller
Qty.
3
3
Item Part No.
1
2
3
4
302719
302720
N/A
302722
Description
VALVE, Needle
SEAL KIT
BLOCK, Valve
SEAL KIT, 3 WD
VALVE BLOCK Part No. 07395
Qty.
1
1
1
1
Item Part No.
5
6
302723
302724
Description
CARTRIDGE, Valve, 3 WD
COIL, Valve, 3 WD
Qty.
1
1
50
HY70OM-8/99
NATIONAL MOWER COMPANY
ONE YEAR
LIMITED WARRANTY
For the period of one year from the date of purchase (45 days if the product is used for rental purposes), National Mower Company will repair or replace free of charge, for the original purchaser, any part or parts found by inspection to be defective by our Factory Authorized Service Station or by the Factory at St. Paul,
Minnesota to be defective in material or workmanship or both. All transportation charges on parts submitted for repair or replacement under this warranty shall be paid for by the purchaser.
This warranty does not include engines, engine parts or tires which are covered under separate warranties furnished by their manufacture or supplier.
All service under this warranty will be furnished and performed by our Factory
Authorized Service Stations.
-THERE IS NO OTHER EXPRESS WARRANTY-
IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR
FROM PURCHASE OR 45 DAYS IF THE PRODUCT IS RENTED AND TO THE
EXTENT PERMITTED BY LAW, ANY AND ALL IMPLIED WARRANTIES ARE
EXCLUDED. THE ABOVE REMEDY OF REPAIR AND REPLACEMENT OF
DEFECTIVE PARTS IS THE PURCHASERS EXCLUSIVE REMEDY FOR ANY
DEFECT, MALFUNCTION OR BREACH OF WARRANTY. LIABILITY FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES UNDER ANY AND ALL
WARRANTIES IS EXCLUDED TO THE EXTENT PERMITTED BY LAW.
NATIONAL MOWER COMPANY
700 Raymond Avenue, St. Paul, Minnesota 55414, U.S.A.
51
Advertisement
Key Features
- 70" Cutting Width
- Three 25" Reels
- Adjustable Cutting Height (1/2" - 2")
- Briggs & Stratton Vanguard Engine (16hp)
- Variable Displacement Hydraulic Pump
- Timken Tapered Roller Bearings
