TM 9--2520--215--34
0023 00--1
ADJUSTING OUTPUT BEVEL GEAR BACKLASH AND GEAR TOOTH
CONTACT PATTERN
0023 00
THIS WORK PACKAGE COVERS:
Adjusting Output Bevel Gear Backlash and Gear Tooth Contact Pattern
ADJUSTING OUTPUT BEVEL GEAR BACKLASH AND GEAR TOOTH CONTACT PATTERN
1. At this point, the backlash should be approximately what is etched on output bevel driven gear.
2. Check backlash by locking drive gear and checking with a dial indicator (1).
1
3. Check gear tooth contact pattern by lightly coating both sides of three or four teeth on driven gear with a mixture
of red lead and oil. While snubbing the drive gear against rotating, run coated teeth on driven gear into mesh with
drive gear teeth. Reverse rotation to make pattern on other side of teeth. Compare contact pattern with those
here.
GEAR TOOTH MESH PATTERN DESIRED FOR STEER
BEVEL DRIVE GEAR WHEN MATED WITH DRIVEN GEAR
(BOTH SIDES OF TOOTH).
GEAR TOOTH MESH PATTERNS DESIRED FOR OUTPUT
BEVEL DRIVE GEAR WHEN MATED WITH DRIVEN GEAR.
CONVEX SIDE OF TOOTH
CONCAVE SIDE OF TOOTH
HEEL
HEEL
TOE
TOE
TOE
HEEL
0.05
APPROX
0.25 APPROX
0.06 APPROX
