Landoll 425B Series, Operator'S Manual

Page: 46 / 88

4-6 F-543-1011 Edition
MAINTENANCE AND LUBRICATION
6. Replace any missing or illegible decals. Replace any
missing or damaged reflective tape.
7. Use Troubleshooting Guide to check for
“SYMPTOMS” AND “PROBLEMS” of any semitrailer
system not functioning correctly, or where wear,
distortion, or breakage can be found. Administer
“REMEDY” according to right-hand column of
Troubleshooting guide.
8. After disassembling any components, thoroughly
clean dirt and old lubricant from all parts. Do not use
a wire brush on any bearing parts or surfaces — use
a stiff bristle brush. Do not use compressed air, or
spin bearing parts when cleaning. These practices
can throw solvents, dirt, or metal particles into your
eyes. Dry clean parts with lint free, clean, soft,
absorbent, cloth or paper. Wash and dry hands.
9. Inspect seals, seal wiping surfaces, bearing caps,
and bearing cones for wear, pitting, chipping, or other
damage.
Gooseneck, Frame, and Deck
Repairing Structural Defects
If any structural defect is found, the fault must be
corrected before further use of the vehicle. To continue
usage could endanger the trailer, its load, personnel,
traffic, and properties. If any cracks or breaks are found,
contact the Landoll factory for repairs. Inspect the deck
daily for broken or missing planks or missing
attachments. Replace any defective parts promptly.
Fifth Wheel Latch Adjustment
1. To adjust fifth wheel latch assembly, support fifth
wheel plate and adjust rear nut until the cam just
touches the flat surface on the latch
(See
Figure 4-2.)
2. Then tighten the front nut compressing the spring to
approximately 10-3/8” or until there is sufficient
tension to hold the fifth wheel plate in place.
IMPORTANT
To check the tension on the latch, place a pry bar
between the fifth wheel plate and the backing plate
and pry down until the latch release. If it releases too
easily, tighten the spring tension. If you are unable to
trip it, back off the spring tension until you are able to
trip the release.

WARNING
Figure 4-2: Fifth Wheel Latch Adjustment
1. Too much tension will cause excessive wear
on the release and possibly bend the latch
rod.
2. Stand clear of fifth wheel plate when prying it
down. Falling plate could cause serious
injury.
FIFTH WHEEL PLATE
FIFTH WHEEL LATCH CAM
HITCH SHIM
SPRING
HITCH PLATE BUSHING
1/4-28 GREASE FITTING
REAR HEX JAM NUT
FRONT HEX JAM NUT
LATCH ROD
m141609 op