Removal (Fig. 61)
Park machine on a level surface, lower cutting
decks, stop engine, apply parking brake and remove
key from the ignition switch.
2. Lubricate new O--rings(item 13)with cleanhydraulic
oil. Position O--rings on gear pump and pump spacer
flanges.
1.
3. Slide coupler onto the piston pump output shaft.
2.
pump from the underside of the machine.
Raise and support machine to gain access to gear
4. Apply Loctite #242 (or equivalent) to threads of cap
screws (item 19) used to secure gear pump to piston
pump.
3.
4.
Drain the hydraulic reservoir.
5.
Position pump spacer to gear pump. Align gearteeth
To prevent contamination of hydraulic system during
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
removal, thoroughly clean exterior of pump and fittings.
5.
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
Read the General Precautions for Removing and
113
N--m).
6.
Remove caps 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).
6.
caps or plugs on open hydraulic lines and fittings. Label
disconnected hydraulic lines for proper installation.
Disconnect hydraulic lines from gear pump and put
7.
ling.
Support gear pump assembly to prevent it from fal-
7.
8.
Lower machine to ground.
Replace hydraulic filter and fill hydraulic reservoir
8.
gear pump to piston pump. Lower and remove gear
pump, coupler, spacer and O--rings from machine.
Remove two (2) cap screws and washers securing
with new hydraulic oil.
9.
Disconnect engine run solenoid electrical connector
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.
9.
pump, mark fitting orientation to allow correct assembly.
Remove fittings from pump and discard O--rings.
If hydraulic fittings are to be removed from gear
Installation (Fig. 61)
10.Connect
engine run solenoid electrical connector,
start the engine and check for proper operation.
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).
11.
System in this section).
Properly fill hydraulic system (see Charge Hydraulic
12.Stop
hydraulic reservoir oil level.
engine and check for hydraulic oil leaks. Check
A. If 90o hydraulic suction fitting (item 8) was re-
moved, torque fitting nut from 103 to 118 ft--lb (140
to 160 N--m).
Groundsmaster 4000--D/4010--D
Page 4 -- 81
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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