Pinion Gear Depth

Rear Axle - 286RBI

PINION GEAR DEPTH VARIANCE:

PINION DEPTH MEASUREMENT AND ADJUSTMENT
Measurements are taken with pinion cups and pinion bearings installed in housing. Take measurements with a Pinion Gauge Set 6730 and Dial Indicator C-3339 (Fig. 6).

1. Assemble Pinion Height Block 6739, Pinion Block 6738 and rear pinion bearing onto Screw 6741 (Fig. 6).






2. Insert assembled height gauge components, rear bearing and screw into the housing through pinion bearing cups (Fig. 7).
3. Install front pinion bearing and Cone 6740 hand tight (Fig. 6).





4. Place Arbor Disc 6732 on Arbor D-115-3 in position in the housing side bearing cradles (Fig. 8). Install differential bearing caps on Arbor Discs and snug the bearing cap bolts. Then tighten cap bolts in a cries-cross pattern to 108 Nm (80 ft. lbs.).

NOTE: Arbor Discs 6732 have different step diameters to fit other axle sizes. Pick correct size step for axle being serviced.

5. Assemble Dial Indicator C-3339 into Scooter Block D-115-2 and secure set screw.
6. Position Scooter Block/Dial Indicator flush on the pinion height block. Hold scooter block and zero the dial indicator.





7. Slowly slide the scooter block across the pinion height block over to the arbor (Fig. 9). Move the scooter block till dial indicator crests the arbor, then record the highest reading.
8. Select a shim equal to the dial indicator reading plus the drive pinion gear depth variance number etched in the face of the pinion gear (Fig. 4) using the opposite sign on the variance number. For example, if the depth variance is -2, add +0.002 inch to the dial indicator reading.
9. Remove the pinion depth gauge components from the axle housing