Tooth Contact Adjusting Procedures

TOOTH CONTACT ADJUSTING PROCEDURES





1. Standard tooth contact pattern
A: Small end side
B: Drive side tooth face (Side on which force acts when running forward)
C: Big end side
D: Coast side tooth face (Side on which force acts when reversing)





2. Tooth contact pattern produced when drive bevel gear height is too large

CAUSE: The driven bevel is too close to the drive bevel gear.





REMEDY: Use thicker bevel gear mount adjusting spacer to separate the driven bevel gear more from the drive bevel gear.





3. Tooth contact pattern produced when driven bevel gear height is too small

CAUSE: The driven bevel gear is too separated from the drive bevel gear.





REMEDY: Use thinner driven bevel gear mount adjusting spacer to bring the driven bevel gear more closer to the drive bevel gear.





NOTE:
1. If correct tooth contact cannot be obtained even by change of the driven bevel gear mount adjusting spacer, increase or decrease or decrease the drive bevel gear preload adjusting spacer and the drive bevel gear mount adjusting spacer as described below and then adjust tooth contact again.
- When the driven bevel gear height is too small even if the thinnest driven bevel gear mount adjusting spacer 0.13 mm (0.0051 inch) is used:

Replace the drive bevel gear mount adjusting spacer that is in use with one that is one rank thicker and replace the drive bevel preload adjusting spacer that is in use with one that is one rank thinner.

- When the driven bevel gear height is too large event if the thickest driven bevel gear mount adjusting spacer 0.52 mm (0.0205 inch) is used:

Replace the drive bevel gear mount adjusting spacer that is in use with one that is one rank thinner and replace the drive bevel gear preload adjusting spacer that is in use with one that is one rank thicker.

2. Repeat above steps until the tooth contact pattern equal or close to the standard pattern is obtained.
3. If the tooth contact pattern cannot be adjusted close to the standard pattern by above adjustment, replace the drive bevel gear and driven bevel gear as a set and readjust the tooth contact.