Toro 20330 Service Manual - Page 23

Disassembly - parts

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WORM DRIVE TRANSMISSION 6. Place a block of wood under the wheel pinion for support and drive the roll pin out of the axle (Fig. 007). Repeat the process on the other side. A 8. Remove the transmission from the chassis. 9. Reverse the procedure to install. NOTE: Support the wheel pinions with the wood block while driving the roll pins in. This will prevent the axle from being bent. Fill the transmission with oil after it is installed in the mower (Fig. 009). Note the front of the transmission is identified by the oil fill/check screw and the flat tab which is part of the lower case. Fig 007 3428-0135 A. Wood Block A 7. The wheel pinion, thrust washer, pivot, and spring arm will now slide off the end of the axle (Fig. 008). Repeat the process on the other side. A. Fill/Check B. Plug C B Fig 009 C. Tab 3428-0166 Disassembly 1. Cut and discard the push-on retainer on top of the transmission pulley. Remove the belt and pulley. Fig 008 3428-0137 WPM Drive Systems Manual 1-5

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1-5
WPM Drive Systems Manual
Fig 008
3428-0137
7.
The wheel pinion, thrust washer, pivot, and spring
arm will now slide off the end of the axle (Fig. 008).
Repeat the process on the other side.
Fig 007
3428-0135
6.
Place a block of wood under the wheel pinion for
support and drive the roll pin out of the axle (Fig.
007). Repeat the process on the other side.
8.
Remove the transmission from the chassis.
9.
Reverse the procedure to install.
NOTE: Support the wheel pinions with the wood
block while driving the roll pins in. This will
prevent the axle from being bent. Fill the
transmission with oil after it is installed in
the mower (Fig. 009).
Note the front of the transmission is identified by the oil
fill/check screw and the flat tab which is part of the lower
case.
Fig 009
3428-0166
WORM DRIVE TRANSMISSION
Disassembly
1.
Cut and discard the push-on retainer on top of the
transmission pulley. Remove the belt and pulley.
A. Wood Block
A. Fill/Check
C. Tab
B. Plug
A
B
A
C