Toro Groundsmaster 3280-D Service Manual page 413

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1. Input shaft/pinion gear
2. Bearing case shims
Gear Pattern Movement Summary
Groundsmaster ® 3280-D/3320
05138SL Rev B
Adjustments to the gear contact position are made by moving the input
shaft/pinion gear (bearing case shims) or by moving the differential gear case
(differential bearing shims)
Note: Bearing case shims are available in 0.10 mm (0.004 inch) and 0.20
mm (0.008 inch) thickness.
Note: Differential bearing shims are available in 0.10 mm (0.004 inch), 0.20
mm (0.008 inch), and 0.40 mm (0.016 inch) thickness.
Study the different contact patterns
gear engagement as necessary.
Note: When making changes, note that 2 variables are involved; refer to the
Gear Pattern Movement Summary (page
Example: If the pinion gear to ring gear backlash is set correctly to
specifications and the bearing case shim is changed to adjust tooth contact,
it may be necessary to adjust backlash to the correct specification before
checking the contact pattern.
Every gear has a characteristic pattern. The illustrations show typical patterns
only and explain how patterns shift as the gear location is changed.
Figure 284
3. Differential bearing shims
4. Differential gear case
(Figure 284).
(Figure 285
8–71).
Page 8–71
and Figure 286) and correct
Drive Axles: Service and Repairs