Toro Greensmaster 3200 Service Manual page 116

11. Pull gear pump (28) and connected hoses assem-
blies (23 and 27) away from the hydrostat (16) and se-
cure.
12. Remove hose assemblies (25, 26, and 35) and O–
rings (30 and 32) from the hydrostat (16). Allow hoses
to drain into a suitable container. Plug open hose con-
nections to prevent contamination.
13. Remove hydraulic fittings (3 and 17) and O–rings
(29 and 34) from the hydrostat (16). Plug open ports on
the hydrostat to prevent contamination.
14. Loosen both set screws (5) on the pump hub (4)
enough to allow the hydrostat (16) shaft to be removed.
Support the hydrostat when removing its
supporting fasteners to prevent it from
falling and causing personal injury.
15. Remove both lock nuts (14), cap screws (15), and
flat washers (19) from the hydrostat (16) flange and
pump plate (48).
16. Separate hydrostat (16) from the pump plate (48)
and pump hub (4). Remove key (47) from the hydrostat
shaft.
Installation (Fig. 16)
1. Make sure the inside of the pump hub (4) is clean.
Apply antiseize lubricant to both the hydrostat (16) shaft
and the inside of the pump hub.
2. Coat key (47) with petroleum jelly and insert it into
the hydrostat (16) shaft. Position the hydrostat to the
pump plate (48) and pump hub (4). Slide the shaft into
the hub with the key.
3. Secure the hydrostat (16) to the pump plate (48)
with both cap screws (15), flat washers (19), and lock
nuts (14).
4. Tighten both set screws (5) on the pump hub (4).
5. Lubricate all new O–rings with clean hydraulic fluid.
6. Remove plugs from the hydrostat (16). Install new
O–rings (29 and 34) and hydraulic fittings (3 and 17) to
the hydrostat.
7. Unplug hose connections. Inspect threads and
sealing surfaces of hydraulic fittings and hydraulic hose
connectors. Replace any damaged or worn fittings or
connectors.
8. Install O–rings (30 and 32) and hose assemblies
Hydraulic System
CAUTION
(25, 26, and 35) to the hydrostat (16).
IMPORTANT: Failure to remove the plug will cause
excessive pressure in the hydrostat and damage
seals.
9. Remove plug from the suction port on the gear
pump (Fig. 20). Install O–ring (2) to the pump.
10. Position gear motor (28) to the hydrostat (16) so that
the pump inlet is facing up. Secure gear pump to the hy-
drostat with both hex socket head screws (20) and flat
washers (19). Torque screws from 27 to 31 ft–lb (3.7 to
4.3 kg–m).
11. Remove clamp from pump inlet hose (24).
12. Position neutral system assembly to the hydrostat
(16). Secure assembly to the hydrostat by securing the
cable support to the hydrostat with both cap screws (Fig.
19).
13. Fasten and tighten cap screw and pivot washer to
the cam plate shaft of the hydrostat. Connect extension
spring to the neutral arm (Fig. 18).
14. Insert pin into the spring bracket with the extension
spring attached to the pin. Secure pin to the bracket with
the lock nut (Fig. 17).
15. Check neutral position of the traction pedal. If ad-
justment is required, see Transmission Neutral Position
Adjustment.
SUCTION PORT
Page 5 – 44
Figure 20
Greensmaster 3200/3200–D