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Groundsmaster 3505--D Hydraulic SystemPage 4 -- 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, lower cutting units or attachments and stop en-
gine. Remove key from the ignition switch.
2. Thoroughly clean machine before disconnecting, re-
moving or disassembling any hydraulic components.
Make sure hydraulic components, hoses, connections
and fittings arecleaned thoroughly. Alwayskeep in mind
the need for cleanliness when working on hydraulic
components.
WARNING
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hy-
draulic System Pressure in the General Infor -
mation section.
3. Putcaps or plugs onany hydraulic lines, hydraulicfit-
tings and components left open or exposed to prevent
contamination.
4. Put labels on disconnected hydraulic lines and
hoses forproper installation after repairsare completed.
5. Note the position of hydraulic fittings (especially el-
bow fittings) on hydraulic components before removal.
Mark partsif necessary to makesure they willbe aligned
properly when reinstalling hydraulic fittings, hoses and
tubes.
After Repair or Replacement of Components
1. Check oillevel in the hydraulicreservoir and add cor-
rect oil if necessary. Drain and refill hydraulic system
reservoir and change oil filter if component failure was
severe or system is contaminated (see Flush Hydraulic
System).
2. Lubricate o--rings and seals with c lean 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 Fitting Installa-
tion in the General Information section).
5. After repairs, check control linkages or cables for
proper adjustment, binding or broken parts.
6. After disconnecting or replacing any hydraulic com-
ponents, operate machine functions slowly until air is
out of system (see Charge Hydraulic System).
7. Checkfor hydraulicoil leaks.Shut offengine andcor-
rect leaksif necessary. Check oil levelin hydraulicreser-
voir and add correct oil if necessary.
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, 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 thistype of injury.Gangrene may resultfrom
such an injury.
Check hydraulic lines and hoses daily for leaks, kinked
lines, loose mounting supports, wear, loose fittings,
weather deterioration and chemical deterioration. Make
any necessary repairs before operating equipment.
Hydraulic
System