Service and Repairs
General Precautions for Removing and Installing Hydraulic System Components
Before Repair or Replacement of Components
After Repair or Replacement of Components
1.
Before removing any parts from the hydraulic sys-
1. Check oil level in the transaxle and add correct oil if
necessary. Drain and refill transaxle and change oil filter
if component failure was severe or system is contami-
nated (see Flush Hydraulic System).
tem, park vehicle on a level surface, engage parking
brake, and stop engine. Remove key from the ignition
switch.
2.
Clean vehicle before disconnecting, removing, or
2. Lubricate O–rings and seals with clean hydraulic oil
before installing hydraulic components.
disassembling any hydraulic components. Make sure
hydraulic components, hoses connections, and fittings
are cleaned thoroughly. Always keep in mind the need
for cleanliness when working on hydraulic equipment.
3.
Make sure caps or plugs are removed from the hy-
draulic tubes, hydraulic fittings, and components before
reconnecting.
4.
draulic hoses and fittings (see Hydraulic Fitting Installa-
tion).
Use proper tightening methods when installing hy-
CAUTION
Before performing any service or repair on hy-
draulic system components, relieve system
pressure to avoid injury from pressurized hy-
draulic oil. Stop the engine, remove key from the
ignition switch, rotate the steering wheel in both
directions, lower or support the bed and operate
other hydraulic accessories.
5.
ponents, operate vehicle functions slowly until air is out
of system (see Hydraulic System Start Up).
After disconnecting or replacing any hydraulic com-
6. Check for hydraulic oil leaks. Shut off engine and cor-
rect leaks if necessary. Check oil level in transaxle and
add correct oil if necessary.
3.
Put caps or plugs on any hydraulic lines, hydraulic fit-
tings, and components left open or exposed to prevent
contamination.
4.
Put labels on disconnected hydraulic lines and hoses
for proper installation after repairs are completed.
5.
Note the position of hydraulic fittings (especially el-
bow fittings) on hydraulic components before removal.
Mark parts if necessary to make sure they will be aligned
properly when reinstalling hydraulic hoses and tubes.
Check Hydraulic Lines and Hoses
Check hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings,
weather deterioration and chemical deterioration. Make
all necessary repairs before operating.
WARNING
Keep body and hands away from pin hole leaks
or nozzles that eject hydraulic fluid under high
pressure. Use paper or cardboard, not hands, to
search for leaks. Hydraulic fluid escaping under
pressure can have sufficient force to penetrate
the skin and cause serious injury. If fluid is in-
jected into the skin, it must be surgically re-
moved within a few hours by a doctor familiar
with this type of injury. Gangrene may result from
such an injury.
Workman 3000/4000 Series
Page 9 – 25
Hydraulic System
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