Bolens 24638B Owner's Manual

 3-1/2 H.P Model Numbers
247-638-000
LOG SPLITTER 24638B
A IMPORTANT: Read Safety Rules and Instructions Carefully /
Thank you for purchasing an American-built product. FORM NO. 770-5204B
INDEX
Safe Operation Practices ................... 3 Off-Season Storage... ................ 10
Assembly Instructions . ..................., 5 Trouble Shooting Chart .............. 11
Operation .........eeerreereeeze0:enee a. 7 Illustrated Parts ..... AA 12, 14
Maintenance ........o e... 000 0d0reaiao 9 Repair Parts Lists... .............. 13, 14
A Instructions «jiven with this symbol are for personal
safety. Be suie to follow them. |
A y WARNING Y
This unit is equipped with an internal combustion engine and should not be used on or near any unim-
proved forest-covered, brush-covered or grass:covered land unless the engine's exhaust system is equipped
with a spark arrester meeting applicable loca or state laws (if any). If a spark arrester is used, it should be
maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources
Code). Other states may have similar laws. F :deral laws apply on federal lands. A spark arrester muffler is
available at your nearest engine authorized service center.
2
person operates the log splitter than at any other
time.
5. No one should operate this unit while intoxicated
or while taking medication that impairs the
senses or reactions. A clear mind is essential for
safety. Never allow a person who is tired or
otherwise not alert to use your splitter.
PREPARATION
1. Never wear loose clothing or jewelry that can
be caught by moving parts of your log splitter
and pull you into it. Keep clothing away from all
moving parts of your log splitter.
2. Wear proper head gear to keep hair away from
moving parts. Always wear protective hearing
devices as needed.
3. Always wear safety shoes. À dropped log can
seriously injure your foot.
™ Always wear safety glasses or goggles while
operating your splitter. A piece of splitting log
could fly off and hit your eyes.
5. If you wear gloves, be sure they are tight fitting
without loose cuffs or draw strings.
6. Use your log splitter in daylight, or under good
artificial light.
PPO OOP
A $ WARNING $
A 00000002
~ |
| To reduce the potential for any injury, comply with the following safety instructions. Failure to
comply with the instructions may result in personal injury.
SAFE OPERATION PRACTICES FOR LOG SPLITTERS
TRAINING 7. Never operate your splitter on slippery, wet,
1. Before operating this splitter, read and under- muddy or icy surfaces. Safe footing is essen-
stand this manual completely. Become familiar tial in preventing accidents. Never operate your
with it for your own safety. To fail to do so may splitter while attached to a towing vehicle.
cause serious injury. Do not allow anyone to 8. Only operate your splitter on level ground and
operate your splitter who has not read this not on the side of a hill. It could tip, or rolling
manual. Keep this manual in a safe place for logs or poor footing could cause an accident.
future and regular reference and for ordering Operating the splitter on level ground also
replacement parts. prevents the spillage of gasoline from the fuel
2. Never use your splitter for any other purpose tank. |
than splitting wood. It is designed for this use 9. Never attempt to move the log splitter over
and any other use may cause an injury. Your log hilly or uneven terrain without a tow vehicle or
splitter is a precision piece of power equipment, adequate help.
not a playtoy. Therefore, exercise extreme 10. Always block the wheels to prevent movement
caution at all times. of log splitter while in operation.
3. Never allow children to operate your log 11. Check the fuel before starting the engine.
splitter. Do not allow adults to operate it without Gasoline is an extremely flammable fuel. Do not
== proper instruction. Only persons well acquainted fill the gasoline tank indoors, when the engine
— with these rules of safe operation should be is running, or while the engine is still hot.
allowed to use your log splitter. Replace gasoline cap securely and wipe off any
4. Only the operator is to be near your log splitter splilled gasoline before starting the engine as it
during use. Keep ali others, including pets and may cause a fire or explosion.
children, a minimum of 20 feet away from your 12. Both ends of each log must be cut as square
work zone. Flying wood can be hazardous. If a as possible to help prevent the log from riding
helper is assisting in loading logs, never activate out of the splitter during operation.
the control until the helper is clear of the area. OPERATION
More accidents occur when more than one 1. Stand behind the ram when operating. See
illustrations.
CORRECT
Know how to stop the unit and disengage the
controls.
Never place hands or feet between log and split-
ting wedge or between log and ram during
forward or reverse stroke. To do so may result
in crushed or amputated fingers or toes, or
worse, you may lose an arm or foot.
Do not straddle the splitter when using it. A slip
in any position could result in a serious injury.
Do not step over your log splitter when the
engine is running. You may trip or accidentally
activate the ram if your step over. If you need
to get to the other side, walk around.
Never try to split two logs on top of each other.
One may fly out and injure you.
10.
11.
12.
13,
14.
15.
16.
17.
18.
When loading the log splitter, place your hands
on the side of the log, not at the ends. Never
attempt to load your splitter while the ram is in
motion. You may get caught by the ram and
injured.
Only use your hand to operate the ram or
control lever. Never use your foot or a rop: or
any other extension device. This could resu t in
your inability to stop your splitter quickly eno ugh
and cause an injury.
Always keep fingers away from any cracks 1hat
open in the log during splitting operation. They
can quickly close and pinch or amputate your
fingers.
Never attempt to split wood across the grain.
Some types of wood may burst or fly out of your
splitter and result in injury to you or a bystan der.
For logs that are not cut square, the longest
portion of the log should be rotated down and
the most square end placed against the ram.
Keep your work area clean. Immediately remove
split wood around your splitter so that yoL do
not stumble over it.
Never move the log splitter while the engine is
running.
Never leave your log splitter unattended with the
engine running. Shut off the engine if you are
leaving your splitter, even for a short period of
time. Someone could accidentally activate the
ram and be injured.
Do not run engine in an enclosed area. Exhe ust
gases contain carbon monoxide. This odorless
gas can be deadly when inhaled.
Be careful not to touch the muffler after the
engine has been running as it is HOT.
If the equipment should start to vibrate
abnormally, stop the engine and check im-
mediately for the cause. Vibration is generally
a warning of trouble.
When cleaning, repairing or inspecting, make
certain all moving parts have stopped.
Disconnect the spark plug wire, and keep the
wire away from the plug to prevent accidental
starting.
MAINTENANCE AND STORAGE
1.
2.
Do not operate your splitter in poor mechanical
condition or when in need of repair.
Periodically check that all nuts, bolts, screws,
hose clamps and hydraulic fittings are tight to
be sure equipment is in safe working condit on.
Where appropriate, check all safety guards ind
shields to be sure they are in the prcper
position. Never operate your splitter with siife-
ty guards, shields or other protective features
removed. These safety devices are for your
protection.
Replace all damaged or worn parts such as
hydraulic hoses and fittings immediately v/ith
manufacturer approved replacement parts.
Do not change the engine governor setting: or
overspeed the engine. This increases the hazard
of personal injury. The maximum engine sp zed
Is preset by the manufacturer and is within s. fe-
ty limits.
5.
10.
11.
12.
13.
14.
15.
16.
17.
Do not alter your splitter in any manner such
as attaching a rope or extension to the control
lever or adding to the width or height of the
wedge. Such alterations may cause your split- -
ter to be unsafe.
Perform all recommended maintenance pro-
cedures before you use your splitter.
Do not service or repair your log splitter without
disconnecting the spark plug wire.
Never store the equipment with gasoline in the
tank inside of a building where ignition sources
are present, such as hot water and space
heaters, clothes dryers and the like. Allow the
engine to cool before storing in any enclosure.
Always store gasoline in an approved, tightly
sealed container. Store the container in a cool,
dry place. Do not store in a building where
ignition sources are present.
To reduce fire hazard, keep engine free of grass,
leaves, wood chips, and excessive grease and
oil.
The hydraulic system of your log splitter requires
careful inspection, along with the mechanical
parts. Be sure to replace frayed, kinked, or
otherwise damaged hydraulic components.
Fluid escaping from a very small hole can be
almost invisible. Do not check for leaks with your
hand. Escaping fluid under pressure can have
sufficient force to penetrate skin, causing
serious personal injury. Leaks can be located by
passing a piece of cardboard or wood over the
suspected leak and looking for discoloration.
Should it become necessary to loosen or remove
any hydraulic fitting or line, be sure to relieve all
pressure by shutting off the engine and
moving the control handle back and forth several
times.
Do not remove the cap from the hydraulic tank
or reservoir while your log splitter is running. Hot
oil under pressure could cause injury.
The pressure relief valve on your splitter is pre-
set at the factory. Do not adjust the valve. Only
a qualified service technician should perform this
adjustment.
Completely drain fuel tank prior to storage. This
guards against accumulation of fuel fumes
which could result in a fire hazard.
Never store log splitter outside without a water-
proof cover. Rain will cause rust on the inside
of the cylinder.
TOWING
1.
This unit should not be towed on any street,
highway or public road. Any licensing needed
to comply with the existing federal, local or state
vehicle requirements is the sole responsibility of
the purchaser.
Before towing, be certain the log splitter is
correctly and securely attached to the towing
vehicle, and the safety chains (if so equipped
or where required by state law) are in place
Leave slack in chains for turning allowance.
Do not allow anyone to sit or ride on your
splitter. They can easily fall off and be serious-
ly injured.
ШИ) wore ASSEMBLY INSTRUCTIONS
Nn This unit is shipped WITHOUT
> GASOLINE or OIL. After assembly,
see separate engine manual for
proper fuel and engine oil
recommendations.
TOOLS REQUIRED
(1) Raw Hide or Plastic Hammer
(1) 3/4” Wrench
(1) Adjustable Wrench
(1) Pair of Pliers
OTHER MATERIALS NEEDED
Approximately 2 gallons of Dexron || automatic
transmission fluid (may be obtained at any local
service auto parts store).
Funnel
Engine oil and gasoline (refer to separate engine
manual)
CONTENTS OF HARDWARE PACK (See figure 1):
(1) Shoulder Bolt
(1) Rubber Washer
(1) Lock Washer
(1) Hex Nut
(1) Ferrule
(1) Hairpin Cotter
(2) Flat Washers
(1) Cotter Pin
(2) Axle Push Caps
(1) Spacer
CTIOTMONOWU»
«—-—— LOOSE PARTS IN CARTON (See figure 2):
L (2) Wheels
M (1) Axle Shaft
N (1) Engagement Rod
O (1) Engagement Handle
FIGURE 2
AXLE PUSH CAP (1)
1. Remove log splitter and loose parts from carton.
Make certain all parts and literature have been
\ | я removed from the carton before the carton is
< discarded. —
= | |
> = 2. Using a raw hide or plastic hammer, tap one axle
AXLE SHAFT (M)
push cap (lI) on one end of axle shaft (M). See
~~ figure 3.
3. Slide one wheel onto the axle shaft.
4. Slide the axle through the frame from the right
hand side of the splitter (as viewed from standing
FIGURE 3 behind it).
LEFT HAND SIDE
OF SPLITTER
\
5. Slide spacer {J} onto axle shaft on the left hand
side of the splitter. Spacer should be on the engine
<—— side of the splitter. See figure 4. Place the other
wheel on the axle.
/
SPACER (J)
FIGURE 4
ET
6. Secure wheel to axle with push cap (I). See figu
5.
PUSH CAP (1)
FIGURES
COTTER PIN (H)
FLAT WASHER {G) |
|
+= lial shay
4 1
| o - ENGAGEMENT /, Hook the bent end of the engagement rod (N)
Um Y > Na ROD (N) <«——— into the lever on top of the pump. See figure 6.
QC
'
8. Next, place one flat washer (G) over the rod.
Insert the cotter pin (H) into the hole in the rod
and secure by bending the ends of the cotter pin_
in opposite directions.
FIGURE 6
ENGAGEMENT HANDLE (0)
Place the flattened end of the engagement handle
(O) down through the slotted bracket beside the
beam. Place shoulder bolt (A) through the bottom
hole in engagement handle. Place rubber washer
(B) on shoulder bolt. Secure to bracket with lock
washer (C) and hex nut (D). See figure 7.
RUBBER WASHER (B)
LOCK WASHER (C) HEX NUT (D)
FIGURE 7
LEVER ON ENGAGEMENT
ВЫ > HANDLE
Ш 10. Place the engagement handle in the notch in the
ENGAGE e .
er MENT slotted bracket (Reverse position). See figures 8
| and 11. Thread the ferrule (E) onto the end of
| = engagement rod.
> ы с > LT 11. Push the lever on top of the pump as far toward -
E A A Dd NOTCH the rear of the unit as it will go as shown in figure
» ) ~~ 8. Hold it in this position and adjust the ferrule on
the engagement rod so the ferrule lines up with the
hole in the engagement handle.
| | Nx 12. Secure the ferrule to engagement handle with
FERRULE (E) Nx flat washer (G) and hairpin cotter (F).
FIGURE 8
OPERATION
BEFORE STARTING
FUNNEL
BREATHER pr,
1. Fill reservoir tank on log splitter with approx-
imately 2 gallons of Dexron II automatic
transmission fluid as follows. Check fluid level ;
before each use. `. |
A. Block up front of log splitter so the beam is | PLE CHECK
level.
B. Remove the fluid check plug from the back of
the log splitter. See figure 9. 1f fluid starts to
come out of the hole, fluid level is correct. If
it does not, replace the check plug loosely,
h pull the cap off the breather tube, and add
Dexron |! automatic transmission fluid until
fluid starts out of the hole when the plug is
removed.
C. Replace fluid check plug securely. Replace
cap on the breather tube. Remove block from
under front of beam.
NOTE
DO NOT operate log splitter with-
out proper amount of trans-
mission fluid in reservoir tank
(beam).
2. Service engine with oil as instructed in the
separate engine manual packed with your unit.
3. Fill fuel tank, using clean, fresh, regular grade
automotive gasoline. Fill tank completely. (Refer
to engine manual packed with log splitter for
complete instructions for the care and maintena ce
of engine. READ DIRECTIONS CAREFULLY.
4. Bleed the air from the hydraulic system as follcws.
a. Remove the breather cap.
b. Start the engine.
c. Slowly work the engagement handle forward
and backward until the ram moves smoothly
in both directions,
d. Stop the engine. Remove the fluid check p ug,
and check fluid level as specified in step cne.
Add fluid as necessary and bleed air from the
hydraulic system until oil level is correct and
the ram operates smoothly.
e. Replace breather cap securely.
Ep noe
Be certain to bleed the air from the
hydraulic system as instructed above
after any repair work is done on the
pump, valve or cylinder, if a hose is
removed for any reason or when adding
fluid to the reservoir.
e...
$ WARNING Y
Do not operate unit with tne breather
cap removed.
TO START ENGINE
1. Place throttle control lever (on engine) in CHCKE
position, towards the front of splitter. See ficure
10.
Em noTE
A warm engine may not require
choking. Simply place lever in RUN
position.
N=
1. CHoKe Run srop A | =
МЛ
М | { THROTTLE
CONTRCL
LEVER
A
\ ——
2 ``.
FIGURE 10
2. Grasp starter handle, place one foot on wheel and
pull starter handle with a quick, full arm stroke.
Return rope slowly to the engine.
3. After engine starts, move throttle control lever to
RUN position.
TO STOP ENGINE
1. Move throttle control lever to STOP position.
2. Disconnect spark plug wire from spark plug to
prevent accidental starting while equipment is
unattended.
USING YOUR LOG SPLITTER
Your log splitter is designed for safe, efficient
operation. BE CAREFUL TO KEEP HANDS AND
FEET AWAY FROM MOVING PARTS.
Engagement handle has three positions: {See figure 11)
Forward - ram moves toward wedge.
Neutral - ram stops in place.
Reverse - ram returns.
ENGAGEMENT HANDLE
ENGAGEMENT HANDLE HELD IN FORWARD
IN NEUTRAL POSITION. — ("~~ POSITION.
— PD
; \
— \
ENGAGEMENT HANDLE
LOCKED IN REVERSE
POSITION.
FIGURE 11
Maximum length that can be split is 20".
TO OPERATE LOG SPLITTER:
1. Set throttle at maximum speed.
2. "lace log on beam and hold in place with right
and.
3. Slowly move engagement handle forward until ram
rests against log. Release engagement handle
(Neutral).
4. Remove your hand from the log and step behind
the ram.
5. Move engagement handle forward until log is split.
6. Move the engagement handle to the rear to return
ram.
The ram should take approximately 22 seconds to
make a complete cycle. This speed may vary depending
on throttle setting and temperature of hydraulic fluid.
mm) NOTE
If you lock the engagement handle in
the reverse slot, the ram will return
until it hits the engagement bracket,
which will throw the engagement
handle into neutral automatically.
A $ WARNING Y
Never attempt to cut a log in half with
the log splitter.
Never stand next to the ram when
operating. Always stand behind the
ram.
MAINTENANCE
A $ WARNING $
Always stop engine and disconnect
spark plug wire before performing any
maintenance or adjustments.
ENGINE OIL
Change oil first two (2) hours of operation. Check
oil level every five (5) operating hours or each time
equipment is used.
Change oil every twenty-five (25) operating hours or
sooner if equipment is operated in extremely dusty
or dirty conditions.
Refer to engine manual for quantity and type of oil.
~ LOG SPLITTER RESERVOIR FLUID
~Check fluid level in log splitter reservoir before every
se. Refer to “Before Starting” under OPERATION
section.
Change the hydraulic fluid in the reservoir every 100
hours of operation. Remove the six hex bolts, lock
washers and hex nuts which hold the end plate to
the beam. Remove the plate and drain the fluid. Be
prepared to catch the fluid in a suitable container.
NOTE
Drain the hydraulic fluid and flush the
reservoir tank assembly and hoses
each time repair work is performed in
the tank, hydraulic pump or valve.
Contaminants in the fluid will damage
the hydraulic components.
E FITTING 4
HEX BOLTS|
LOCK WASHERS
HEX NUTS
FIGURE 12
When the hydraulic fluid is drained from the
reservoir, clean the strainer tube assembly as follows.
1. Remove the hose clamp at the inlet hose (bottom
hose). See figure 12.
2. Pull the inlet hose off the fitting at the beam.
Using an adjustable wrench, remove the fitting
from the beam.
3. Reach inside the end of the beam and pull out the
strainer tube assembly.
4. Clean the strainer tube assembly and reassemble in
reverse order.
Reassemble the end plate. Refill reservoir with ap-
proximately 2 gallons of Dexron |i automatic
transmission fluid and bleed the air from the hydraulic
system as instructed in "Before Starting" under
OPERATION section.
HOSE CLAMPS
Check the hose clamps on the bottom of the pump
for proper tightness before each use.
Hose clamps on the return hose should be checked
once a season.
CARBURETOR ADJUSTMENTS
A Gian]
If any adjustments are made to the
engine while the engine is running
(e.g. carburetor), keep clear of all
moving parts. Be careful of heated
surfaces and muffler.
Refer to engine manual packed with your unit for
carburetor adjustment information.
BELT ADJUSTMENT
1. Disconnect the spark plug wire from the spark
plug and ground against the engine block.
2. Drain the gasoline from the fuel tank or place a
piece of plastic under the cap to prevent leakage.
3. Tip the splitter on one side.
Remove four self-tapping screws from the bottom
belt cover and frame. Refer to figure 13.
5. Loosen the three engine mounting bolts using a
1/2" wrench. Refer to figure 15.
6. Slide the engine outward to tighten the belt until
there is approximately 1/2" deflection. Tighten
engine mounting bolts securely.
BELT REPLACEMENT
|1. Disconnect the spark plug wire from the spark
plug and ground against the engine block.
2. Drain the gasoline from the fuel tank or place a
piece of plastic under the cap to prevent leakage.
Tip the splitter on one side.
4. Remove four self-tapping screws from the bottom
belt cover and frame. See figure 13.
о
ENGINE
MOUNTING
BOLTS
SELF-TAPFING
SCREWS
FIGURE 13 FIGURE 15
5. Using a 9/16" wrench, remove the engine pulley 7. Install the new belt and replace the engine pulley.
by removing the hex bolt and lock washer. See . _ ,
figure 14. Slip the pulley and belt off 8. Slide the engine outward to tighten the new belt
- until there is approximately 1/2" deflection.
Tighten engine mounting bolts securely.
OFF-SEASON STORAGE
IE) vor: In event engine is to be stored for any length of time ~~
| (30 days or more), prepare as follows:
et -
1. Drain gasoline by tipping or by siphon hose, the
run engine until remainder is used and tank ana
carburetor are empty.
A...
Drain gasoline into container outdoors,
away from fire or flame.
Be careful not to lose the square key
on the crankshaft.
HEX BOLT
LOCKWASHER
|
2. Drain carburetor by running engine until it stops
from lack of fuel.
J 3. Protect the inside of engine for storage by
removing spark plug and pouring one ounce of
SAE 30 oil through spark plug hole into cylinder.
Crank engine, without starting, several times to
spread oil over cylinder walls.
4. Never store outside without a waterproof cover.
more
When storing any type of power equip-
FIGURE 14 ment in an unventilated or metal
| storage shed, care should be taken to
rustproof the equipment. Using a light
oil or silicone, coat the equipment,
6. Loosen the three engine mounting bolts usi1g a especially the beam and all moving
1/2" wrench. See figure 15. parts.
10
TROUBLE SHOOTING CHART
De SYMPTOM POSSIBLE CAUSE (S) SOLUTION
| Engine fails to start A. Check fuel tank for gas. A. Fill tank if empty.
B. Spark plug lead wire B. Connect lead wire.
disconnected.
C. Faulty spark plug. C. Clean, adjust gap or replace.
See engine manual.
2. Hard starting or loss of A. Spark plug wire loose. A. Connect and tighten spark plug wire.
power B. Dirty air cleaner. B. Clean air cleaner as described in
engine manual.
3. Engine overheats A. Carburetor not adjusted A. Adjust carburetor. See engine manual.
properly.
B. Air flow restricted. B. Remove blower housing and clean as
described in the engine manual.
C. Engine oil level low. C. Fill crankcase with the proper oil.
4. Will not split logs A. Reservoir fluid level low. A. Check and fill reservoir tank as
instructed in Operation Section.
В. Belt is slipping. B. Tighten belt or replace if worn. See
maintenance section.
C. Pump setting incorrect. С. Adjust pump setting to 3,000 p.s.i.”
“. Leaking cylinder A. Broken seals. A. Replace seals.”
mm B. Scored cylinder. B. Replace cylinder.*
OTE: For repairs beyond minor adjustments, please contact your local service dealer.
should be performed by an authorized service dealer oniv.
11
Model 638
и) МОТЕ
This instruction manual covers various models
and ail specifications shown do not necessari-
ly apply to your model. Specifications subject
to change without notice or obligation.
NOTE: The engine is not under warranty by
the log splitter manufacturer . . . If repairs or A} )
service is needed on the engine, please
contact your nearest author-
Find It Fast
in The
Yellow Pages
а
ized engine service outlet.
Check the “Yellow Pages” of
your telephone book under
“Engines—Gasoline.”
Model 638
PARTS LIST FOR MODEL 638 LOG SPLITTER
KEF.| PART | COLOR NEWIREF.! PART | COLOR! NEW
NO. | NO. | CODE DESCRIPTION PART| NO. | NO. | CODE DESCRIPTION PART
1 717-0816 2-1/2" Cylinder Ass'y. Comp. 46 | 741-0116 Flange Brg. w/ Flats .631" 1.D.
2 | 720-0157 Grip 47 | 726-0214 | Push Cap 5/8" Dia. Rod
3 | 737-0196 90* Elbow Adapter 48 | 781-0002 Frame - Engine
4 | 719-0270 Pusher Plate 49 | 714-0133 Sq. Key 3/16" x 3/16" x
5 738-0601 Shoulder Bolt 5/8" Dia. | 1.60" Lg.*
| x .660" Lg. 1/2-13 Thd. 51 712-0267 Hex Nut 5/16-18 Thd.*
6 | 749-0663 Engagement Handle 52 | 736-0119 L.-Wash. 5/16" 1.D.*
7 | 711-0628 Adjustment Ferrule 53 727-0302 High Pressure Hose
8 | 712-0267 Hex Nut 5/16-18 Thd.* 54 | 737-0183 Adapter - or Boss to MJIC
9 | 736-0119 L.-Wash. 5/16" 1.D.* | —| 9/16-18 to 7/16-20
10 | 781-0021 Strainer Tube Ass y. 55 | 737-0182 Adapter 3/4" Tubing to 3/4
11 781-0069 Oil Tank Ass’ y. Comp -16 M-Boss
12 | 781-0038 Wedge Ass'y. 56 726-0132 Hose Clamp 5/8" 1.D.
13 710-0298 Hex Bolt 5/8-18 x 3.50" 57 737-0184 Adapter 1/2" Tube 9/16-18
Lg. (Grade 5) | or M-Boss
14 | 736-0158 L.-Wash. 5/8" 1.D. 58 | 717-0803 | Valve Ass'y.
15 712-0337 Hex Nut 5/8-18 Thd.* 59 714-0507 Cotter Pin 3/32" Dia. x .75"
16 712-0798 Hex Nut 3/8-16 Thd.* Lg.”
17 736-0169 L.-Wash. 3/8" 1.D.* 60 736-0264 Fl.-Wash. 344" 1.D. x 62"
18 | 735-0144 Rubber Wash. O.D. x .063
| 19 | 738-0143 Shoulder Bolt .498 x .340 61. | 727-0301 Return Hose .50" 1.D.
“20 | 781-0024 Engagement Brkt. 62 | 727-0300 Suction Hose .75" 1.D.
121 | 738-0140 Shoulder Bolt .437" Dia. 63 | 726-0146 Hose Clamp 1/4" 1.D.
+ x .180" Lo. 64 | 737-0191 Adapter 1.0" Tube 1-1/16-
2 | 732-0352 Extension Spring .50" O.D. 12 "O"-Ring
x 4.25" Lo. 65 | 712-0267 Hex Nut 5/16-18 Thd.*
29 — Engine - B8RS 66 | 736-0119 L.-Wash. 5/16" 1.D.*
30 734-0736 Wheel Ass'y. Comp. 10.0" 67 736-0275 Fi.-Wash. .343" 1.D. x .687"
| x 2.75 O.D. x .062
31 750-0118 Sleeve .632" 1.0. х 875" 68 710-0442 Hex Bolt 5/16-18 x 1.60"
O.D. x .90" Lg. Lg.*
32 710-0599 Hex Wash. Hd. Self Tap. 69 710-0604 Hex Hd. Tap Scr. 5/16"
Ser. 1/4-20 x .50" Lg. 70 721-0205 | Gasket
33 | 756-0425 1/2" V-Pulley 7/8" 1.D. x 71 | 781-0023 End Plate
7/8" 1.D. x 3-1/4" O.D. | 72 721-0203 Gasket
34 754-0278 “V"-Belt (4L) 1/2" V X 73 712-0203 Hex Nut 3/4" Thd.*
30" Lg. 74 | 736-0364 | L.-Wash. 3/4" 1.D.*
35 | 781-0008 Belt Cover 75 | 781-0036 Filler Tube Ass'y.
36 736-0119 L.-Wash. 5/16" 1.D.* 76 745-0174 Oil Fill Cap
37 710-0152 Hex Bolt 3/8-24 x 1.0" Lg.* 77 737-0197 45° Male Adapter 7/16-20
38 | 756-0426 1/2 (4L}) "V"-Pulley 5/8" MJ-1/4-18 NP
!.D. x 3-1/2" O.D. 78 | 721-0204 |"O"-Ring .92" |.D. x 1.16”
39 | 710-0938 Set Scr. 1/4-28 x .25" Lg. O.D. x .116 Dia.
40 736-0105 Bell.-Wash. 40" |.D. x 88” 79 710-0920 Hex Bolt 3/4" x 4.0" Lg.
O.D. 80 712-0338 Hex Nut 11/16-12 Thd.
41 710-0649 :j Hex Wash. Hd. TT-Tap Scr. 81 710-0117 Hex Bolt 5/16-24 x 1.00" Lg.
3/8-16 x .87" Lg. (Grade 5)
42 | 712-0123 Hex Nut 5/16-24 Thd.* 82 747-0493 Engagement Rod 16.75" Lg.
43 710-0376 Hex Bolt 5/16-18 x 1.00" Lg.* 83 736-0264 Fl.-Wash. .344" 1.0. х .62"
| 44 736-0119 L.-Wash. 5/16" 1.0." | O.D. x .063
"5 | 747-0458 Axle Shaft 5/8" Dia. x 25.56" Lg. | 84 | 714-0104 | Hair Pin Cotter 5/16" Dia.
{
*For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part
number and size as shown on parts list.
13
Model 638
2-1/2" DIA. CYLINDER
PARTS LIST FOR MODEL 638
REF. NEW
NO. PART NO. DESCRIPTION PART
1 717-0816 | Cylinder Ass'y. Comp.
2 | 753-0392 | 2-1/2" Cyl. Kit "O"-Ring Set
14
MTD PRODUCTS INC +0000000000000000000000 YARD-MAN COMPANY
P.O. BOX 36900 * CLEVELAND OHIO 44136