Usage:
1. Adjust the preload of the bearings for the bevel gear shaft. See the topic, PRELOADING OF BEARINGS FOR BEVEL GEAR SHAFT.
2. Adjust the pinion shaft end play. See the topic, ADJUSTMENT OF END PLAY FOR PINION SHAFT.
3. Install shims (5) and pinion shaft and housing (4).
4. Visually, put the pinion in a position so the heel of the teeth for the pinion shaft is in line with the heel of the teeth for the bevel gear, location (A).
5. Make adjustment of pinion shaft toward or away from the bevel gear (2) by adding or removing shims (5).
6. Assemble tools needed from 8S2338 Indicator Group for checking bevel gear and pinion shaft free movement (backlash).
7. Attach the tools for checking free movement (backlash) to the top of bevel gear case.
8. Hold the pinion shaft so it cannot turn.
9. Put the finger of the dial indicator on one of the teeth on the bevel gear (2).
10. Move the bevel gear backward and forward.
11. Read the difference in the measurements on the dial indicator. This is the amount of free movement (backlash).
12. Check the amount of free movement at four different locations on the bevel gear, taking the lowest measurement as the location to check the amount of free movement.
13. If the measurement is too much at the location of the smallest amount of free movement, remove shims (3) from the left side and install the same shims on the right side of the bevel gear.
14. To get more free movement (backlash), remove shims (1) from the right side and install the same shims on the left side of the bevel gear.
NOTE: The preload on the bevel gear shaft bearings will not be changed by moving shims from one side to the other if the same total number of shims is kept.
15. Make further checks of the adjustment by putting Prussian blue or red lead on the teeth of the bevel gear. The correct area of tooth contact (B) starts near the toe and goes approximately 30 percent of the length of a bevel gear tooth.
16. Make adjustment to the location of the pinion shaft if tooth contact is more on one side of a tooth or is near the heel of a tooth.
17. Add or remove shims (5) to move the pinion shaft and housing (4).
18. Make adjustment to the free movement (backlash) of the bevel gear.
19 Make another pattern of tooth contact (see Steps 3 through 5).
20. If necessary, make several adjustments to the pinion and the bevel gear to get correct tooth contact and free movement (backlash).
Free movement (backlash) for bevel gear and pinion shaft ... .008 ± .003 in.(0.20 ± 0.08 mm)