Toro Greensmaster 3150 Service Manual page 72

12. Loosen both set screws (23) on the pump hub (24)
enough to allow the hydrostat shaft to be removed.
CAUTION
Support the hydrostat when removing its sup-
porting fasteners to prevent it from falling and
causing personal injury.
13. Remove both cap screws (35), lock washers (34),
and flat washers (33).
14. Separate hydrostat from the pump adapter and
pump hub (24). Remove key (21) from the hydrostat
shaft.
Installation (Fig. 17)
1. Make sure the inside of the pump hub (24) is clean.
Apply antiseize lubricant to both the hydrostat (12) shaft
and the inside of the pump hub.
2. Coat key (21) with petroleum jelly and insert it into
the hydrostat shaft. Position hydrostat to the pump
adapter and pump hub (24). Slide the shaft into the hub
with the key.
3. Secure the hydrostat to the pump adapter with both
cap screws (35), lock washers (34), and flat washers
(33). Torque screws from 27 to 31 ft–lb (37 to 42 Nm).
4. Tighten both set screws (23) on the pump hub (24).
5. Inspect threads and sealing surfaces of hydraulic fit-
tings and hydraulic hose connectors. Replace any dam-
aged or worn fittings or connectors.
6. Lubricate all new O–rings with clean hydraulic fluid.
7. Install O–rings (18, 36, and 45) and hose assem-
blies (19, 20, and 44).
Hydraulic System
IMPORTANT: Failure to remove the plug will cause
excessive pressure in the hydrostat and damage
seals.
8. Remove plug from the suction port on the gear
pump (Fig. 20).
9. Install gear pump to the hydrostat (see Hydraulic
Gear Pump Installation).
10. Remove clamp from pump inlet hose (1).
11. Install the neutral system cable support assembly to
the hydrostat with cap screws (6) (Fig. 19). Torque
screws from 27 to 31 ft–lb (37 to 42 Nm).
12. Position pump lever assembly onto the hydrostat
camplate shaft and install the cap screw (1) and pivot
washer (2) securing the pump lever assembly (Fig. 19)
13. Connect the extension spring (1) and damper (2) to
the spring bracket and the neutral arm (Fig. 18).
14. Check neutral position of the traction pedal. If ad-
justment is required, see Adjust Transmission for Neu-
tral in the Traction Unit Owners Manual.
Page 4 – 48 Greensmaster 3150