Toro Groundsmaster 3280-D Service Manual page 374

Assembling the Front Axle (continued)
Drive Axles: Service and Repairs
B. When you install new ring and pinion gears (supplied in matched sets
only) ensure that the numbers etched on both the pinion and ring gear
match (Figure 232).
Compare the +, -, or 0 markings of the old and new pinions. Adjust the
thickness of a new shim pack to compensate for the difference in these
2 numbers.
For example: If the old pinion reads +2 and the new pinion reads -2, add
0.004 inch of bearing shims to the original shim pack thickness.
Note: The following information is provided to help you understand the
adjustment required for proper engagement of new ring and pinion gears.
To ensure proper engagement, an additional number is etched into the
button end of each pinion gear. This number indicates modifications
that must be made to the pinion to ring gear distance for each particular
gear set. This distance is controlled by adding or removing shims behind
the inner bearing cup.
A pinion gear etched 0 is considered standard, and has a 1.210 inches
pinion to ring gear distance.
A pinion gear etched +3 requires a pinion to ring gear distance of 1.213
inches (+0.003 inch from standard). Removing 0.003 inch of bearing
shims moves the pinion gear away from the ring gear, increasing the
pinion to ring gear distance.
A pinion gear etched -3 requires a pinion to ring gear distance of 1.207
inches (-0.003 inch from standard). Adding 0.003 inch of bearing shims
moves the pinion gear closer to the ring gear, decreasing the pinion to
ring gear distance.
g225923
5. Install the correct bearing shims and a new inner bearing cup using a press
plate of proper diameter. Push the bearing into the housing until it bottoms
out against the shims
Note: Pinion bearing shims are available in 0.08 mm (0.003 inch), 0.13 mm
(0.005 inch), 0.25 mm (0.010 inch), and 0.76 mm (0.030 inch) thickness.
Figure 233
(Figure 233).
Page 8–32 Groundsmaster ® 3280-D/3320
05138SL Rev B