5.
switch on piston pump.
Disconnect wire harness connector from neutral
6. Connect wire harness connector toneutral switch on
traction pump.
6.
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
Read the General Precautions for Removing and
7. Remove plugs or caps from disconnected hydraulic
hoses and open ports of the pump assembly. Install fit-
tings and hoses to correct location on gear and piston
pumps (see Hydraulic Fitting Installation and Hydraulic
Hose and Tube Installation in the General Information
section of this chapter).
7.
connect to gear pump and piston pump.
Forinstallationpurposes,labelallhydrauliclinesthat
8.
Put a drain pan below the pump assembly. Remove
8.
Lower machine to ground.
hydraulic hoses and fittings connected to piston and
gear pumps. Putplugs orcaps on disconnected hydrau-
lic hoses to prevent contamination of the system. Put
plugs in open ports of pumps.
9. Install new filter and fill hydraulic reservoir with cor-
rect oil.
IMPORTANT: Refer to Traction Circuit Component
Failure in the General Information section of this
chapter for information regarding the importance of
removing contamination from the traction circuit.
NOTE: If fuel tank is removed from the machine, the
gear pump and piston pump can be removed as a com-
plete assembly.
9.
Removal in this section).
Remove gear pump from machine (see Gear Pump
10.Disconnect engine run solenoid electrical connector
to prevent engine from starting. Prime pumps by turning
ignition key switch to crank engine for ten (10) seconds.
Let starter cool and then repeat cranking procedure
again.
10.Support
the piston pump to prevent it from falling
while removing two (2) cap screws and washers retain-
ing pump assembly to engine flywheel plate. Carefully
pull pump assembly from flywheel plate and raise it out
of the machine.
11.Connect engine run solenoid electrical connector,
start the engine and check for proper operation.
Installation (Fig. 68)
12.Properly fill hydraulic system (see Charge Hydraulic
System in this section).
IMPORTANT: To prevent spring coupler damage,
make sure that piston pump is properly supported
anddoesnotputsideloadintocouplerduringpump
installation.
13.Stop engine and check for hydraulic oil leaks. Check
hydraulic reservoir oil level.
1.
Carefully raise piston pump into the machine, align
5
8
3
1
pump input shaft to spring coupler on engine and posi-
tion it to the engine flywheel plate. Support pump to pre-
vent it from producing any side load into coupler and
also to align pilot diameter of pump to flywheel plate
bore.
2
6
2.
screws (item 6) used to secure piston pump to engine
flywheel plate.
Apply Loctite #242 (or equivalent) to threads of cap
4
3.
While maintaining pump alignment with spring cou-
7
pler and flywheel plate, install two (2) cap screws and
washers to secure piston pump to engine. Torque
screws from 79 to 84 ft--lb (108 to 113 N--m).
Figure 69
4.
Install gear pump to piston pump (see Gear Pump
Installation).
1.
2.
3.
4.
Piston pump
Cap screw
Pump control arm
Spacer
5.
6.
7.
8.
Lock nut
Jam nut
Traction rod
Rod end
5.
Position traction rod to control arm on piston pump
by installing cap screw, spacer and lock nut (Fig. 69).
Groundsmaster 4000--D/4010--D
Page 4 -- 87
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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