Toro Groundsmaster 3280-D Service Manual page 175

Removing the Hydrostatic Transmission
Groundsmaster ® 3280-D/3320
05138SL Rev B
1. Park the machine on a level surface, engage parking brake, lower cutting
deck (or implement), and shut off the engine. Remove key from the key
switch.
2. To prevent contamination of the hydraulic system, clean transmission and
front axle.
Operate all hydraulic controls to relieve system pressure and avoid
injury from pressurized hydraulic fluid.
3. Label hydraulic hoses to assist in assembly. Disconnect all hydraulic
hoses from the transmission assembly. Allow hoses to drain into a suitable
container. Plug or cap openings of transmission and hoses to prevent
contamination.
4. On 4-wheel drive machines, disconnect 4-wheel drive driveshaft from
transmission; refer to
(page 8–43). Position driveshaft away from transmission.
5. Remove transmission driveshaft; refer to
Driveshaft (page 5–87).
6. Remove cotter pin (item 19 in
rod end to pump lever. Remove traction rod from lever.
7. Label location of wires attached to neutral switch. Disconnect wires from
switch and position away from transmission.
8. Remove locknut (item 11 in
transmission anchor.
Support transmission when removing it from the front axle to prevent
it from falling and causing personal injury.
9. Loosen and remove 4 bolts (items 1 and 2 in
transmission to front axle. Locate and retrieve washers and spacers. Note
location of washers and spacers for assembly purposes.
10. Carefully pull the transmission from the front axle differential.
11. Remove and discard gasket (item 9 in
transmission and front axle.
12. If necessary, remove hydraulic fittings from transmission. Note orientation of
fittings for assembly purposes.
13. Remove and discard all O-rings from removed hydraulic hoses and fittings.
Pump lever is secured to transmission shaft with Loctite #680
Retaining Compound in addition to bolts and locknuts. Use puller
to remove pump lever from transmission. To prevent transmission
damage, strike lever with hammer during removal.
14. If pump lever (item 18 in
locknuts. Use puller to remove lever from transmission shaft.
CAUTION
Removing the Rear Axle Driveshaft (4-Wheel Drive)
Removing the Transmission
Figure 81) and flat washer that retain traction
Figure 81) that secures transmission to
CAUTION
Figure
IMPORTANT
Figure 81) removal is necessary, remove bolts and
Page 5–91
Figure 81) that secure
81). Clean gasket surfaces of
Hydraulic System: Service and Repairs