User manual

Groundsmaster 4000--D/4010--D Hydraulic SystemPage 4 -- 81
Removal (Fig. 61)
1. Park machine on a level surface, lower cutting
decks, stop engine, apply parking brake and remove
key from the ignition switch.
2. Raise and support machine to gain access to gear
pump from the underside of the machine.
3. Drain the hydraulic reservoir.
4. Topreventcontaminationofhydraulicsystemduring
removal, thoroughly clean exterior ofpump and fittings.
5. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
6. Disconnect hydraulic lines from gear pump and put
capsorplugsonopenhydraulic linesand fittings.Label
disconnected hydraulic lines for proper installation.
7. Support gear pump assembly to prevent it from fal-
ling.
8. Remove two ( 2) cap screws and washers securing
gear pump to piston pump. Lower and remove gear
pump, coupler, spacer and O--rings from machine.
9. If hydraulic fittings are to be removed from gear
pump,markfittingorientationtoallowcorrectassembly.
Remove fittings from pump and discard O--r ings.
Installation (Fig. 61)
1. If fittings were removed from gear pump, lubricate
and place new O--rings onto fittings. Install fittings into
pump openings using marks made during the removal
process to properly orientate fittings. Tighten fittings
(see Hydraulic Fitting Installation in the General Infor-
mation section of this chapter).
A. If 90
o
hydraulic suction fitting (item 8) was re-
moved, torque fitting nut from 103 to 118 ft--lb (140
to 160 N--m).
2. LubricatenewO--rings(item13)withcleanhydraulic
oil. Position O--rings on gear pump and pump spacer
flanges.
3. Slide coupler onto the piston pump output shaft.
4. Apply Loctite #242 (or equivalent) to threads of cap
screws (item 19) used to secure gear pump to piston
pump.
5. Positionpumpspacertogearpump.Aligngearteeth
and slide gear pump input shaft into coupler. Secure
gear pump to piston pump with two (2) cap screws and
flat washers. Torque screws from 79 to 84 ft--lb (108 to
113 N--m).
6. Removecaps and plugs from hydraulic lines and fit-
tings.Usinglabelsplacedduringpumpremoval,proper-
ly install lines to gear pump (see Hydraulic Hose and
Tube Installation in the General Information section of
this chapter).
7. Lower machine to ground.
8. Replace hydraulic filter and fill hydraulic reservoir
with new hydraulic oil.
9. Disconnectengine runsolenoidelectricalc onnector
to prevent engine from starting. Prime the hydraulic
pump by turning the ignition key switch to start and
crankingtheengineforten(10)seconds.Letstartercool
and then repeat cranking procedure again.
10.Connect engine run solenoid electrical connector,
start the engine and check for proper operation.
11.Properly fill hydraulic system(seeChargeHydraulic
System in this section).
12.Stopengineandcheck forhydraulicoilleaks.Check
hydraulic reservoir oil level.
Hydraulic
System