caution - Toro
caution - Toro
caution - Toro
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Removal (Fig. 53)<br />
1. Park machine on a level surface, lower cutting deck,<br />
stop engine, apply parking brake and remove key from<br />
the ignition switch.<br />
2. To prevent contamination of hydraulic system during<br />
removal, thoroughly clean exterior of pump assembly.<br />
3. Remove traction rod from control arm on piston<br />
pump by removing lock nut, spacer and cap screw (Fig.<br />
54).<br />
4. Disconnect wire harness connector from neutral<br />
switch on piston pump.<br />
5. Read the General Pre<strong>caution</strong>s for Removing and<br />
Installing Hydraulic System Components at the beginning<br />
of the Service and Repairs section of this chapter.<br />
6. For installation purposes, label all hydraulic lines that<br />
connect to gear pump and piston pump.<br />
7. Put a drain pan below the pump assembly. Remove<br />
hydraulic hoses and fittings connected to piston and<br />
gear pumps. Put plugs or caps on disconnected hydraulic<br />
hoses to prevent contamination of the system. Put<br />
plugs in open ports of pumps.<br />
NOTE: If fuel tank is loosened and raised from the machine,<br />
the gear pump and piston pump can be removed<br />
as a complete assembly.<br />
8. Remove gear pump from machine (see Gear Pump<br />
Removal in this section).<br />
9. Support the piston pump to prevent it from falling<br />
while removing two (2) cap screws and washers retaining<br />
pump assembly to engine flywheel plate. Carefully<br />
pull pump assembly from flywheel plate and raise it out<br />
of the machine.<br />
Installation (Fig. 53)<br />
1. Carefully lower piston pump into the machine, align<br />
pump input shaft to spring coupler on engine and position<br />
it to the engine flywheel plate. Support pump to prevent<br />
it from producing any side load into coupler and<br />
also to align pilot diameter of pump to flywheel plate<br />
bore.<br />
2. While maintaining pump alignment with spring coupler<br />
and flywheel plate, install two (2) cap screws and<br />
washers to secure piston pump to engine flywheel plate.<br />
Torque screws from 79 to 84 ft -lb (108 to 113 N -m).<br />
3. Install gear pump to piston pump (see Gear Pump<br />
Installation).<br />
4. Position traction rod to control arm on piston pump<br />
by installing cap screw, spacer and lock nut (Fig. 54).<br />
5. Connect wire harness connector to neutral switch on<br />
traction pump.<br />
6. Remove plugs or caps from disconnected hydraulic<br />
hoses and open ports of the pump assembly. Install fittings<br />
and hoses to correct location on gear and piston<br />
pumps.<br />
7. Install new filter and fill hydraulic reservoir with correct<br />
oil.<br />
8. Disconnect engine run solenoid electrical connector<br />
to prevent engine from starting. Prime pumps by turning<br />
ignition key switch to crank engine for 10 seconds. Repeat<br />
cranking procedure again.<br />
9. Connect engine run solenoid electrical connector,<br />
start the engine and check for proper operation.<br />
10.Properly fill hydraulic system (see Charge Hydraulic<br />
System in this section).<br />
11.Stop engine and check for hydraulic oil leaks. Check<br />
hydraulic reservoir oil level.<br />
6<br />
7<br />
5<br />
1. Piston pump<br />
2. Cap screw<br />
3. Pump control arm<br />
4. Spacer<br />
4<br />
8<br />
3<br />
Figure 54<br />
2<br />
5. Lock nut<br />
6. Jam nut<br />
7. Traction rod<br />
8. Rod end<br />
1<br />
Hydraulic<br />
System<br />
Groundsmaster 4100--D<br />
Page 4 - 75<br />
Hydraulic System
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