Service Manual
3-3
WPM Drive Systems Manual
SINGLESPEEDSPUR/BEVELGEARTRANSMISSION
Description
This basic transmission has been in use for several
years. There are minor variations, such as different
shafts on the bevel pinion gear to accommodate belt
alignment on different chassis. All use a bevel pinion
input gear which mates with a combination bevel/spur
gear, which drives a nal spur gear.
Lubrication
Proper lubrication for this transmission is 2.5 – 3 uid
ounces (7.1cc – 9.0cc) of lithium based No. 2 grease.
TransmissionRemovalandReplacement
1. Raise the rear of the mower and support with a block
(Fig. 027).
2. Remove transmission belt cover.
3. Remove both rear wheels.
4. Remove retaining ring, spring, thrust washer, and
pinion from both axles (Fig. 028). Refer to “Wheel
Pinion Clutch” on page 5-3 for additional information
about the clutch mechanism.
Fig027 PICT-1870
A. Wood block
A
Fig028 PICT-1873a
5. Continue disassembly, remove rocking key, clutch
washer, clip ring, keyed thrust washer, pivot arm
thrust washer, and friction ring. The pivot arm and
spring arm will then slide off the axle (Fig. 029).
Fig029 PICT-1874a