ProPass 200Page 3 -- 26Hydraulic System
Service and Repairs
General Precautions for Removing and Installing Hydraulic System Components
Before Repair or Replacement of Hydraulic Compo-
nents
1. Before removing any components from the hydraulic
system, position ProPass machine on a level surface.
Engage tow vehicle parking brake, stop engine and re-
move key from the ignition switch. If ProPass is
equipped with wireless controller, power off wireless
controller.
2. Clean machine before disconnecting, removing or
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.
Before disconnecting or p erforming any work on
the hydraulic system, all pressure in the system
must be relieved and all rotating machine parts
must be stopped. See Relieving Hydraulic Sys-
tem Pressure in the General Information section
of this chapter.
WARNING
3. Put caps or plugs on any hydraulic lines, hydraulic fit-
tings and components left open or exposed to prevent
system contaminat ion.
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 installing hydraulic hoses and tubes.
After Repair or Replacement of Hydraulic Compo -
nents
1. Check oil level in the hydraulic reservoir and add c or -
rect oil if necessary. Drain and refill hydraulic system
reservoir and change oil filter if component failure was
severe or system is contaminated.
2. Lubricate O--rings and seals with clean hydraulic oil
before installing hydraulic components.
3. Make sure caps or plugs are removed from the hy-
draulic tubes, hydraulic fittings and components before
reconnecting.
4. Use proper tightening methods when installing hy-
draulic hoses and fittings (see Hydraulic Hose and Tube
Installation and Hydraulic Fitting Installation in the Gen-
eral Information section of this chapter).
5. After disconnecting or replacing any hydraulic com-
ponents, operate machine functions slowly until air is
out of hydraulic system.
6. Check for hydraulic oil leaks. Shut off engine and cor-
rect leaks if necessary. Check oil level in hydraulic reser-
voir and add correct oil if necessary.
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