Selection Adjusting Washers
SELECTION ADJUSTING WASHERSDrive Pinion Height Adjusting Washer
^ Drive gear and drive pinion are supplied in matched sets only Matching numbers on both drive pinion and drive gear are etched for verification. If a new gear set is being used, verify the numbers of each drive pinion and drive gear before proceeding with assembly
^ The mounting distance from the center line of drive gear to the back face of drive pinion for the Model 226 axle assembly is 109.5 mm (4.312 inch).
On the button end of each drive pinion, there is etched a plus (+) number, a minus (-) number, or a zero (0), which indicates the best running position for each particular gear set. This dimension is controlled by a selective drive pinion height adjusting washer between drive pinion inner bearing race and drive pinion. For example: If a drive pinion is etched m+8 (+3), it would require 0.08 mm (0.003 inch) less drive pinion height adjusting washer than a drive pinion etched 0. This means decreasing drive pinion height adjusting washer thickness; increases the mounting distance of drive pinion to 109.6 mm (4.315 inch). If a drive pinion is etched m-8 (-3), it would require adding 0.08 mm (0.003 inch) more to drive pinion height adjusting washer than would be required if drive pinion were etched 0. By adding 0.08 mm (0.003 inch), the mounting distance of drive pinion was decreased to 109.4 mm (4.309 inch) which is just what m-8 (a-3) etching indicated.
^ To change drive pinion adjustment, use different drive pinion height adjusting washers which come in different thickness.
^ Use the following tables as a guide for selecting the correct drive pinion height adjusting washer thickness to add or subtract from the old drive pinion height adjusting washer.
1. Make sure all parts are clean and that drive pinion bearings are well lubricated.
2. Assemble drive pinion bearings into Tools.
Tool number:
A: - (8144)
B: - (6740)
C: - (6741)
3. Install drive pinion bearing inner race and drive pinion height adjusting washer to axle housing using Tool as shown.
4. Turn the assembly several times to seat drive pinion bearings.
5. Measure the turning torque, using Tool.
Tool number: ST3127S000 (J-25765-A)
Turning torque specification: 1.2 - 2.8 Nm (0.13 - 0.28 kg-m, 11 - 24 inch lbs.)
6. Tighten side bearing caps to the specified torque installing Tools as shown.
Tool number:
A: - (6739)
B: - (D-115-2)
C: - (8541A-1)
D: - (D-115-3)
7. Put scooter block on pinion height block. Make sure that dial indicator is level adjusting pressure with a hand. Dial indicator indicates 0.
8. Slide dial indicator along arbor. Record the maximum.
9. Adjust drive pinion height adjusting washer so that the maximum will be 0.