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FINAL DRIVE 11-15
Final Gear Case and Oil
•
Apply a little hypoid gear oil to the bearings, and turn the
gear shaft more than 5 turns to allow the bearings to seat.
•
Measure the bearing preload. Bearing preload is defined
as the force or torque which is needed to start the gear
shaft turning.
Preload for Pinion Gear Bearing
Using Spring Scale:
3.0
∼
5.0 N (0.30
∼
0.50 kg, 0.7
∼
1.1 lb)
Using Torque Wrench:
0.6
∼
1.0 N·m (0.06
∼
0.10 kgf·m, 5.2
∼
8.7 in·lb)
NOTE
○
Preload can be measured either with a spring scale or
a beam-type torque wrench. When measured with a
spring scale, the preload is designated by force (N, kg,
lb), and when measured with a torque wrench, it is des-
ignated by torque N·m, (kgf·m, in·lb).
Using Spring Scale:
•
Hook the spring scale [A] on the handle at the point 200
mm (7.87 in.) [B] from the center of the gear shaft.
•
Hold the bearing housing in a vise so that the gear shaft
axis is vertical.
•
Apply force to the handle horizontally and at a right angle
to it.
Special Tool - Pinion Gear Holder: 57001–1165 [C]
If the preload is out of the specified range, replace the
shims under the flat washer, and re-check the preload.
Refer to the next paragraph to select suitable shims.
Preload Adjustment:
•
To increase preload, decrease the thickness of the size of
the shim(s). To decrease preload increase the thickness
of the shim(s).
•
Change the thickness a little at a time.
•
Re-adjust the bearing preload, and re-adjust if necessary.
Shims for Preload Adjustment
Thickness
Part Number
0.1 (0.004 in.)
92025-1219
0.2 (0.008 in.)
92025-1220
0.3 (0.012 in.)
92025-1221
0.5 (0.020 in.)
92025-1222
0.6 (0.024 in.)
92025-1223
0.7 (0.028 in.)
92025-1224
0.8 (0.031 in.)
92025-1225
* 0.9 (0.035 in.)
92025-1226
1.0 (0.040 in.)
92025-1227
1.30 (0.051 in.)
92025-1214
1.32 (0.052 in.)
92025-1215
1.34 (0.053 in.)
92025-1216
1.36 (0.054 in.)
92025-1217
1.38 (0.0543 in.)
92025-1218
*: Standard