Greensmaster 3300/3400Hydraulic System Page 5 -- 56
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, disengage and
lowercuttingunits,movefunctionalcontrollevertoneu-
tral(N), engage parkingbrake andstopthe engine.Re-
move the key from the ignition switch. Wait for all
machine movement to stop before getting off machine.
2. Clean machine before disconnecting, removing or
disassembling any hydraulic components. Make sure
hydraulic components, hose c onnections and fittings
are cleaned thoroughly. Always keep in mind the need
for cleanliness when working on hydraulic equipment.
CAUTION
Beforeopeninghydraulicsystem,operateallhy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
RelievingHydraulicSystemPressureintheGen-
eral Information section of this chapter.
3. Putcapsorplugsonanyhydrauliclines,hydraulicfit-
tings and components left open or exposed to prevent
contamination.
4. Put labels on disconnected hydraulic tubes and
hosesforproperinstallationafterrepairsarecompleted.
5. Note the position of hydraulic fittings (especially el-
bow fittings) on hydraulic components before removal.
Markpartsifnecessarytomakesuretheywillbealigned
properly when reinstalling hydraulic hoses and tubes.
After Repair or Replacement of Components
1. Checkoillevelinthehydraulicreservoirandaddcor-
rect oil if necessary. D rain and refill hydraulic system
reservoir and change oil filter if component failure was
severe or systemis 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 lines, hydraulic fittings and components before
reconnecting hydraulic lines.
4. Use proper tightening methods when installing hy-
draulic fittings and lines (see Hydraulic Fitting Installa-
tion and Hydraulic Hose and Tube Installation in the
General Information section of this chapter).
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
outofsystem(seeChargeHydraulicSysteminthissec-
tion).
7. Checkforhydraulicoilleaks.Shutoffengineandcor-
rectleaksifnecessary.Checkoillevelinhydraulicreser-
voir and add correct oil if necessary.
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