
Service and Repairs
General Precautions for Removing and Installing Hydraulic System
Components
Before Repair or Replacement of Hydraulic Components
1. Before removing any parts from the hydraulic system, park machine on a
level surface, engage parking brake, lower cutting units and stop engine.
Remove key from the key switch.
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.
CAUTION
Operate all hydraulic controls to relieve system pressure and avoid
injury from pressurized hydraulic oil. Controls must be operated with
the key switch in RUN and the engine OFF. Make sure all electrically
operated control valves are actuated. Return key switch to OFF
when pressure has been relieved. Remove key from the key switch.
3. Put caps or plugs on any hydraulic lines, hydraulic fittings and components
left open or exposed to prevent system contamination.
4. Put labels on disconnected hydraulic lines and hoses for proper installation
after repairs are completed.
5. 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 installing hydraulic hoses and tubes.
After Repair or Replacement of Hydraulic Components
1. Check fluid level in the hydraulic tank and add correct fluid if necessary.
Drain and refill hydraulic tank and change fluid filter if component failure was
severe or system is contaminated (see
Flush Hydraulic System (page 5–65)
).
2. Lubricate O−rings and seals with clean hydraulic fluid before installing
hydraulic components.
3. Make sure caps or plugs are removed from the hydraulic tubes, hydraulic
fittings and components before reconnecting.
4. Use proper tightening methods when installing hydraulic hoses and fittings
(see
Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fittings)
(page 5–8)
).
5. After repairs, check control linkages or cables for proper adjustment, binding
or broken parts.
6. After disconnecting or replacing any hydraulic components, operate machine
functions slowly until air is out of system (see
(page 5–69)
).
7. Check for hydraulic fluid leaks. Shut off engine and correct leaks if necessary.
Check fluid level in hydraulic tank and add correct fluid if necessary.
Hydraulic System: Service and Repairs
Page 5–62
Reelmaster
®
3100-D/3105-D
20252SL Rev A
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