Multi Pro 5800 Hydraulic SystemPage 5 − 51
Service and Repairs
General Precautions for Removing and Installing Hydraulic System Components
Before Repair or Replacement of Components
1. Before removing any parts from the hydraulic sys-
tem, park machine on a level surface, engage parking
brake and stop engine. Remove key from the ignition
switch.
2. Clean machine before disconnecting, removing or
disassembling any hydraulic components. Make sure
that hydraulic components, hose connections and hy-
draulic fittings are cleaned thoroughly. Always keep in
mind the need for cleanliness when working on hydrau-
lic components.
CAUTION
Rotate steering wheel and depress traction ped-
al in both forward and reverse to relieve hydrau-
lic system pressure and to avoid injury from
pressurized hydraulic oil.
3. After turning engine Off, operate all hydraulic con-
trols to relieve hydraulic system pressure.
4. Put caps or plugs on any hydraulic lines, hydraulic fit-
tings or components left open or exposed to prevent
contamination.
5. Put labels on disconnected hydraulic lines and
hoses for proper installation after repairs are completed.
6. Record the position of hydraulic fittings (especially
elbow fittings) on hydraulic components before removal.
Mark parts if necessary to make sure they will be aligned
properly when reinstalling hydraulic lines.
After Repair or Replacement of Components
1. Check oil level in the hydraulic reservoir and add cor-
rect oil if necessary. Drain and refill hydraulic reservoir
and change oil filter if component failure was severe or
system is contaminated (see Flush Hydraulic System in
this section).
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 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 repairs, check control linkages and cables for
proper adjustment, binding or broken parts.
6. After disconnecting or replacing any hydraulic com-
ponent(s), operate machine functions slowly until air is
out of system (see Charge Hydraulic System in this sec-
tion).
7. 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 (see machine
Operator’s Manual).
Check Hydraulic Lines and Hoses
WARNING
Keep body and hands away from pin hole leaks
or nozzles that eject hydraulic fluid under high
pressure. Use paper or cardboard to search for
leaks. Hydraulic fluid escaping under pressure
can have sufficient force to penetrate the skin
and cause serious injury. If fluid is injected into
the skin, it must be surgically removed within a
few hours by a doctor familiar with this type of in-
jury. Gangrene may result from such an injury.
Check hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings and
deterioration. Make all necessary repairs before operat-
ing the machine.
Hydraulic
System
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