MAINTENANCE AND LUBRICATION
4-7
Hydraulic System
General
1.
Check the oil level of the tractor wet kit or hydraulic
engine power hydraulic tank weekly, or after any
leakage.
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for proper hydraulic oil.
Check the hydraulic oil level with hydraulic cylinders
in the retracted position and the hydraulic pump
disengaged. Enough volume in tank (approximately
15 gallons) above hydraulic oil level must be available
to accept extra oil from cylinders when retracted.
2.
Overfilling can cause hydraulic fluid overflow during
operation.
3.
Dock level valve only receives 5 GPM flow from the
main control valve.
4.
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.
(
for proper hydraulic oil.
Check oil level with the undercarriage cylinders
extended and all other hydraulic cylinders in the
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
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5.
Use the fuel recommended for the engine package
installed on your semitrailer.
WARNING
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.
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.
Figure 4-3: 7-Pin Connector
If more oil than specified is sent to dock leveler
valve, damage to dock levelers and personal
injury can occur. If less oil than specified is sent
to dock leveler, they will not operate or operation
will be erratic.
7-PIN CONNECTOR
WIRE DIAGRAM
BLUE
B
AUX
CLEARANCE
LEFT TURN
LACK
W
GROUND
TAIL LTS
RIGHT TURN
STOP LTS
HITE
BROWN
GREEN
RED
YELLOW