operating and maintenance procedures for landing gear

operating and maintenance procedures for landing gear
OPERATING AND MAINTENANCE
PROCEDURES FOR
LANDING GEAR
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CAUTION: Before attempting to operate the landing gear, you must read
and understand the following procedures:
Perform all procedures in a lighted area clear of obstacles and other personnel.
Always grip the crank handle securely with both hands.
Maintain proper footing at all times.
Never attempt to shift the landing gear while under load.
Lifting and lowering of the trailer must always be done in LOW GEAR.
DO NOT ATTEMPT TO LIFT OR LOWER TRAILER WITH LANDING GEAR IN
HIGH GEAR, AS SERIOUS PERSONAL INJURY COULD OCCUR.
Always secure the crank handle when not in use.
OPERATING INSTRUCTIONS
BEFORE OPERATING, IDENTIFY THE MOUNTING STYLE OF YOUR LANDING GEAR — INSIDE
OR OUTSIDE MOUNT (SEE FIGURES BELOW).
FIGURE 1
TRAILER
RETRACT
TRAILER
COUNTER CLOCKWISE
RETRACT
CLOCKWISE
LOW
HIGH
LOW
HIGH
EXTEND
EXTEND
COUNTER CLOCKWISE
CLOCKWISE
OUTSIDE MOUNT
INSIDE MOUNT
• Push crank handle in for low speed.
• Push crank handle in for high speed.
• Pull crank handle out for high speed.
• Pull crank handle out for low speed.
• Turn crank:
• Turn crank:
counterclockwise = retract
clockwise = extend
XL-LG305
counterclockwise = extend
clockwise = retract
1
COUPLING INSTRUCTIONS
STEP 4
Inflate tractor air suspension and back up
close to the trailer centering the kingpin
with the throat of the fifth wheel and STOP!
DO NOT ATTEMPT TO COUPLE UNTIL
STEPS 2 THROUGH 4 ARE COMPLETED.
Adjust trailer height so that the fifth wheel
will lift the trailer.
➠
STEP 1
FIFTH WHEEL
MUST LIFT
TRAILER
4"- 6"
KINGPIN
➠
TRAILER
(TOP)
FIFTH WHEEL
WILL NOT LIFT
TRAILER
FIFTH WHEEL
TILTED DOWN
USE LOW
GEAR
STEP 5
STEP 2
➊ Chock trailer wheels.
➋ Connect brake lines and light cord.
➌ Support slack in lines to prevent
Couple and verify that
the fifth wheel locks are
properly closed around
the kingpin.
interference.
➍ Set trailer brakes.
➌
➋
STEP 6
➍
➊
While still in low
gear, retract
landing gear until
pads just come
off the ground.
USE LOW GEAR
UNTIL PADS JUST
COME OFF GROUND.
STEP 3
Make sure
that the
landing gear is
in low speed
(see Figure 1)
and engage
crank handle.
HANDLE ENGAGED
HANDLE DISENGAGED
2
STEP 7
Switch to high
gear, fully
retract and
secure crank
handle.
SECURE HANDLE
UNCOUPLING INSTRUCTIONS
STEP 3
STEP 1
Position the
tractor and
trailer on
level ground,
clear of
persons and
obstacles.
Shift landing
gear to high
speed and
engage crank
handle.
OK
HANDLE
ENGAGED
HANDLE
DISENGAGED
STEP 4
Extend landing gear
until pads just touch
the ground.
STEP 2
➊ Set trailer brakes.
USE HIGH GEAR
UNTIL PADS TOUCH
GROUND.
Slowly back tractor tightly against trailer.
➋ Set tractor brakes.
STEP 5
➌ Chock trailer wheels.
Switch to low gear
and crank an
additional 4-8 turns.
Secure crank
handle.
➊
USE
LOW
GEAR
SECURE HANDLE
STEP 6
➌
➋
• Pull fifth wheel release handle
• Disconnect air lines and light cord
• Release tractor brakes and slowly drive
away from trailer
MAINTENANCE PROCEDURES
LUBRICATION
Lubrication should be performed at least every six months and more frequently in applications where the
landing gear are exposed to excessive moisture, waterspray, dust, or if they are not used for extended
periods. Lubricate with the trailer securely coupled to a tractor (see coupling instructions).
Employ a lubricant compatible with the original
GEARBOX
BEVEL GEARS
(maintain 1 lb.)
type of grease used:
(maintain 1 lb.)
Standard = Lithium base EP-2
Low Temperature = Lubriplate aero-grade
1. Fully retract the landing gear, then using high
gear extend 2-3 turns.
2. Lubricate through the grease fittings as shown.
LIFT SCREWS
3. Extend and retract the landing gear to apply
(maintain 1/2 lb.)
grease to the entire length of the screw
3
HARDWARE:
ALIGNMENT:
• Tighten or replace mounting bolts as
necessary.
• Inspect the mounting bracket for cracks or
other signs of damage.
• Repair or replace any broken or damaged
part of the landing gear assembly or
mounting structure.
• Inspect the crank handle bolt and lock nut.
Tighten or replace as necessary.
• Cross shaft connection bolts and lock nuts
should be secure, but allow side-to-side
play in the cross shaft.
• Check for proper crank shaft engagement in
both high and low gear.
• Landing gear with excessive play should be
rebuilt or replaced.
• Using a square,
check that both
landing gear legs
are square with
the trailer and
parallel with each
other as shown.
Bent or damaged
legs are an
indication of
possible damage
to the lift screw,
lift nut or other
internal
components
and should be
replaced.
TRAILER
END
VIEW
SQUARE
CORRECT
SQUARE
TRAILER SIDE VIEW
SQUARE
TROUBLE-SHOOTING POINTS
Problem
Cause
Correction
Hard to crank landing gear
1. Turning crank in wrong direction.
2. Attempting to raise or lower trailer
in high gear.
3. Cross shaft binding
- over-tightened bolts
- cross shaft bent or too long
4. Mis-aligned landing gear legs.
1. See Figure 1 on page 1 for proper crank rotation.
2. Shift into low gear (see Figure 1). DO NOT ATTEMPT
TO LIFT OR LOWER IN HIGH GEAR.
3. Inspect cross shaft bolts. Back off bolts to allow lateral
(side-to-side) movement of the cross shaft.
5. Lack of grease.
6. Mis-aligned crank shaft holder
or crank shaft extension.
7. Damaged lift screw or lift nut.
8. Interference between powder metal
bushing and trailer mounting
surface.
4. Legs must be parallel and extend and retract evenly. Remove
cross shaft, adjust landing gear legs to same height.
5. Grease landing gear legs as provided above in Maintenance
section of manual.
6. Inspect and align crank shaft holder or extension with the
crank shaft.
7. Check landing gear for signs of impact (accident) damage.
Disconnect cross shaft and crank legs individually to
determine which leg is damaged. Replace damaged leg.
8. Hole in trailer mounting surface may need to be enlarged.
See Holland Service Bulletin #30.
Shaft turns but legs
do not operate
1. Broken shaft or shaft bolt.
2. Broken pinion gear or bevel gear
or gear pins.
1. Replace broken bolt(s) and shaft as needed.
2. Replace broken gear(s) or pin.
Shaft does not turn
1.
2.
3.
4.
1.
2.
3.
4.
Crankshaft skips when cranking
1. Broken gear teeth.
Broken gear teeth.
Damaged lift screw or nut.
Seized lift screw or nut.
Bent inner or outer leg tube.
Replace broken gear(s).
Replace inner leg or entire landing gear leg.
Replace inner leg or entire landing gear leg.
Replace bent inner or outer leg, or entire landing gear leg.
1. Replace broken gear(s).
Copyright © March 2000 The Holland Group, Inc.
★ Holland Hitch Co.
Holland, MI 49423
Whitehouse Station, NJ 08889
Denmark, SC 29042
Wylie, TX 75098
Milpitas, CA 95035
888-396-6501
FAX 800-769-3299
4
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Warrenton, MO 63383
636-456-3455
FAX 636-456-6792
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Axle Products Division
Delphos, OH 45833
419-692-6015
FAX 419-692-0503
✚ Holland Neway
International, Inc.
Muskegon, MI 49442
231-773-3271
FAX 231-766-3893
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Norwich, Ontario
Canada N0J 1P0
519-863-3414
FAX 519-863-2398
✚ Euro-Hitch, GmbH
✚ Eurohitch (U.K.), Ltd.
Schloss Holte
Tipton, West Midlands
Germany
United Kingdom
49-(0)5207-89560
44-(0)121-520-6116
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FAX 44-(0)121-520-6070
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Hartlebury, United Kingdom
44-(0)1299-254400
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Holland Transtrade
Far East SDN BHD
Shah Alam, Malaysia
60-(0)3-734-2888
FAX 60-(0)3-736-5588
★ Holland Hitch of Canada, Ltd.
Woodstock, Ontario
Canada N4S 7Z5
519-537-3494
FAX 800-565-7753
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(Thailand) Company, Ltd.
Bangkok, Thailand
66-(0)2-513-8758
FAX 66-(0)2-513-8757
★ Holland Hitch Western, Ltd.
Surrey, British Columbia
Canada V3S 5K1
604-574-7491
FAX 604-574-0244
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Tokyo, Japan
Melton, Victoria, Australia
81-(0)3-3461-9130
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FAX 81-(0)3-3463-1407
FAX 61-(0)3-9747-9617
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