MAINTENANCE AND LUBRICATION
3-7
TABLE OF CONTENTS
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.
Hydraulic System
General
1. Check the oil level of the tractor wet kit or hydraulic
engine power hydraulic tank weekly, or after any
leakage. See Table 4-1 for proper hydraulic oil.
Check the hydraulic oil level with the undercarriage
cylinder in the retracted position and the hydraulic
pump disengaged.
2. Overfilling can cause hydraulic fluid overflow during
operation.
3. Hydraulic system pressure relief valves should be set
at 2500 psi.
Hydraulic Engine Package
1. Check the hydraulic oil level weekly, or after any
leakage. See Table 4-3 for proper hydraulic oil.
Check oil level with the undercarriage cylinder in
retracted position and with the engine stopped.
2. Check hoses weekly for cracks or leaks. If a valve or
line leaks, it should be replaced immediately.
3. Check the engine oil each time before using. Oil level
should be maintained between the “L” and “F” marks
on the oil dip stick. For further maintenance
procedures and proper lubrication specifications,
please refer to the engine owner’s manual that was
supplied with the hydraulic engine package.
4. Replace hydraulic filter with new filter at least every 6
months or more often under adverse conditions (See
Table 4-3.)
5. Use the fuel recommended for the engine package
installed on your semitrailer.
Electrical System
1. Maintenance of the electrical system consists of
inspection and minor servicing. Any wire, connection
or electrical component showing signs of corrosion,
wear, breakage or unraveling must be repaired or
replaced. (See Figures 4-3 and 4-5) for electrical
wiring diagrams.
2. Frayed or unraveling wire must have the defective
section removed and replaced with wire of the same
color and gauge. Seal all connections and insulate.
3. Corroded terminals must have the corrosion
removed, source of corrosion neutralized and the
terminals resealed, protected, and insulated.
4. Fuse or circuit breaker burn-out or blow-out usually
indicates an electrical short-circuit, although a fuse
can occasionally fail from vibration. Insert a second
fuse or reset the breaker. If this fuse immediately
burns out or the breaker trips, locate the cause of the
electrical short and repair.
5. A light that repeatedly burns-out usually indicates a
loose connection, poor system ground, or a
malfunctioning voltage regulator. Locate the source
of the problem and repair. System grounds must be
grounded to bare metal surfaces. Paint, grease, wax,
and other coatings act as insulators. Replacement
lamps must be equivalent to the factory installed
lamp.
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