Mainshaft Thrust Clearance Adjustment

M/T Mainshaft Thrust Clearance Adjustment

Special Tools Required
- Catch adapter 07GAJ-PG20110
- Base adapter 07GAJ-PG20130

1. Remove the 72 mm shim (A) and oil guide plate M from the transmission housing (B).






2. Thoroughly clean the 28 mm spring washer (A) and the 28 mm washer (B) before installing them on the clutch housing side ball bearing (C). Note the installation direction of the spring washer.

3. Assemble all of the mainshaft components.
NOTE: Refer to the Exploded View, as needed, during the assembly. Mainshaft Reassembly

4. Install the mainshaft assembly into the clutch housing.

5. Place the transmission housing over the mainshaft and onto the clutch housing.

6. Tighten the clutch and transmission housings with several 8 mm bolts.
NOTE: It is not necessary to use sealing agent between the housing for this procedure.

7. Lightly tap on the mainshaft with a plastic hammer.






8. Attach the catch adapter (A) and base adapter (B) to the mainshaft as follows:
- Back out the catch adapter bolt (C), and loosen the two hex bolts (D).

- Fit the holder over the mainshaft so its lip is towards the transmission.

- Align the catch adapter lip around the groove at the inside of the mainshaft splines, then tighten the hex bolts.

9. Fully seat the mainshaft by tapping its end with a plastic hammer.

10. Thread the catch adapter bolt in until it just contacts the wide surface of the base adapter.






11. Zero a dial gauge (A) on the end of the mainshaft.

12. Turn the catch adapter bolt (B) clockwise; stop turning when the dial gauge has reached its maximum movement. The reading on the dial gauge is the amount of mainshaft thrust clearance.
NOTE: Do not turn the catch adapter bolt more than 60 degrees after the needle of the dial gauge stops moving. Applying more pressure with the catch adapter bolt could damage the transmission.

13. If the reading is within the standard, the clearance is correct. If the reading is not within the standard, select the appropriate shim needed from the table, and recheck the thrust clearance.









Subtract the total clearance measurement from the middle of the clearance standard 0.14 mm (0.0056 in.).





Select the shim closest to the amount calculated, for example the 1.80 mm (0.071 in.) shim.

14. With oil guide plate M and the appropriate size shim installed in the transmission housing, check the thrust clearance again to verify the clearance is within the standard.

72 mm Shim





72 mm Shim