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Groundsmaster 4100--D Hydraulic SystemPage 4 -- 69
Removal (Fig 49)
1. Park machine on a level surface, lower cutting deck,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Raise seat and secure it with prop rod to gain access
to gear pump.
3. Drain the hydraulic reservoir.
4. To prevent contamination ofhydraulic system during
pump removal, thoroughly clean exterior of pump and
fittings.
5. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of this section.
6. Disconnect hydraulic lines from gear pump and put
caps or plugs on open hydraulic lines and fittings. Label
disconnected hydraulic lines for proper installation.
7. Support gear pump assembly to prevent it from fal-
ling.
8. Removetwo (2)capscrews andwashers thatsecure
gear pump to piston pump. Remove gear pump, cou-
pler, spacer and O--rings from machinethrough the seat
opening.
Installation (Fig 49)
1. Lubricate new O--rings with clean hydraulic oil and
position on pump.
2. Slide coupler onto the piston pump output shaft.
3. Position O--rings and spacer to gear pump. Align
gear teeth and slide gear pump input shaft into coupler.
Secure gear pump to piston pump with two (2) cap
screws and washers. Torque cap screws from 79 to 84
ft--lb (108 to 113 N--m).
4. Remove caps or plugs from hydraulic lines and fit-
tings. Install hydraulic lines to gear pump.
5. Replace hydraulic filter and fill hydraulic reservoir
with new hydraulic oil.
6. Disconnect engine run solenoid electrical connector
to prevent engine from starting. Prime the hydraulic
pump byturning the ignitionkeyswitch to startandcrank
theenginefor ten(10)seconds. Wait 15secondsand re-
peat cranking procedure again.
7. Connect engine run solenoid electrical connector,
start the engine and check for proper operation.
8. Properly fill hydraulic system (see Charge Hydraulic
System in this section).
9. Stop engine and check for hydraulic oil leaks. Check
hydraulic reservoir oil level.
Hydraulic
System