Toro Groundsmaster 3320-D - Servicing the Hydrostatic Transmission (Machine Serial Numbers below 316000000)

ServicingtheHydrostaticTransmission(MachineSerialNumbers
below316000000)
g230836
Figure82
1.Retainingring
20.Piston(pump)(9eachperblock)39.Centersection
2.Trunnionshaft21.O-ring40.Pipeplug(4each)
3.Flatwasher
22.Checkvalve41.O-ring
4.Rollerbearing23.Plug42.Threadedplug
5.Needlebearing
24.O-ring43.Bolt(4each)
6.Transmissionhousing
25.Shimpack
44.Expansionplug
7.Lipseal
26.Reliefvalvespring
45.Motorvalveplate
8.Trunnioncam
27.Reliefvalvecone
46.Dowelpin
9.Lipseal28.Plug
47.Motorshaft
10.Ballbearing
29.Bolt(2each)48.Dowelpin(2each)
11.Woodruffkey30.Bolt(2each)
49.Housinggasket
12.Pumpshaft
31.Backupring
50.Chargepumphousing
13.Swashplate32.O-ring
51.Retainingring
14.Springpin33.O-ring52.Cylinderblock(motor)
15.Thrustplate34.Pin
53.Slipperretainer(motor)
16.Cylinderblock(pump)
35.Bearing
54.Piston(motor)(9eachperblock)
17.Pumpvalveplate
36.Woodruffkey55.Flange-headscrew(2each)
18.Needlebearing
37.Gerotor(charge)pump56.O-ring(2each)
19.Slipperretainer(pump)38.Shaftseal57.Threadedplug(2each)
Groundsmaster
®
3280-D/3320
Page5–93
HydraulicSystem:ServiceandRepairs
05138SLRevB