Greensmaster 3250--DHydraulic System Page 4 -- 52
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. Clean machine before disconnecting, removing or
disassembling any hydraulic components. Make sure
hydraulic components, hose 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 hy-
draulic oil. Controls must be operated with the
ignition switch in RUN and the engine OFF. Make
sure all electrically operated control valves are
actuated. Return ignition switch to OFF when
pressure has been relieved. Remove key from
the ignition switch.
3. Putcapso rplugsonanyhydrauliclines,hydraulicfit-
tings and components left open or exposed to prevent
contamination.
4. Put labels on disconnected hydraulic lines 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 o r Replacement of Components
1. Checkoillevelinthehydraulicreservoirandaddcor -
rect oil if necessary. Drain and refill hydraulic system
reservoir.Also,changeoilfilterifcomponentfailurewas
severe or system is contaminated (see Flush Hydraulic
System).
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 m ethods when installing hy-
draulichoses and fittings (see Hydraulic Fitting Installa-
tion).
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
outof system(seeChargeHydraulicSysteminthissec-
tion).
7. Checkforhydraulicoilleaks.Shutoffengineandcor-
rectleaksifnecessary.Checkoillevelinhydraulicreser-
voir and add correct oil if necessary.
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