user manual

Groundsmaster 4100--D Hydraulic SystemPage 4 -- 69
Removal (Fig 49)
1. Park machineon alevels urface, lowercutting deck,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Raiseseatandsecureitwithproprodtogainaccess
to gear pump.
3. Drain the hydraulic reservoir.
4. Topreventcontaminationofhydraulicsystemduring
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
capsor plugson openhydraulic linesand fittings.Label
disconnected hydraulic lines for proper installation.
7. Support gear pump assembly to prevent it from fal-
ling.
8. Removetwo(2)capscrewsandwashersthatsecure
gear pump to piston pump. Remove gear pump, cou-
pler,spacerandO--ringsfrommachinethroughtheseat
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 inputshaft 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 enginerunsolenoid electricalconnector
to prevent engine from starting. Prime the hydraulic
pumpbyturningtheignitionkeyswitchtostartandcrank
theengineforten(10)seconds.Wait15secondsandre-
peat cranking procedure again.
7. Connect engine run solenoid electrical connector,
start the engine and check for proper operation.
8. Properly fillhydraulic system(see ChargeHydraulic
System in this section).
9. Stopengineand checkforhydraulicoilleaks.Check
hydraulic reservoir oil level.
Hydraulic
System