23. Mainshaft Thrust Clearance Adjustment

Mainshaft Thrust Clearance Adjustment
Special Tools Required
^ Mainshaft base 07GAJ-PG20130
^ Mainshaft holder 07GAJ-PG20110





1. Remove the 52x62 mm shim (A) and oil guide plate M from the transmission housing (B).





2. Thoroughly clean the spring washer (A) and washer (B) before installing them on the ball bearing (C). Note the installation direction of the spring washer.
3. Install the 3rd/4th synchro hub, the distance collar, the 5th synchro hub, the distance collar, and ball bearing on the mainshaft.

NOTE: Refer to the mainshaft reassembly Exploded View.

4. Install the mainshaft in the clutch housing.
5. Place the transmission housing over the mainshaft and onto the clutch housing.
6. Secure the clutch and transmission housings with several 8 mm bolts.

NOTE: It is not necessary to use sealing agent between the housings for this procedure.

7. Light tap the mainshaft with a plastic hammer.





8. Attach the special tools to the mainshaft as follows:
^ Back-out the mainshaft holder bolt (A), and loosen the two hex bolts (B).
^ Fit the holder over the mainshaft so its lip is toward the transmission.
^ Align the mainshaft holder 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 mainshaft holder bolt in until it just contacts the wide surface of the mainshaft base.





11. Zero a dial gauge (A) on the end of the mainshaft.
12. Turn the mainshaft holder bolt (B) clockwise; stop turning when the dial gauge (A) has reached its maximum movement. The reading on the dial gauge is the amount of mainshaft thrust clearance.

NOTE: Do not turn the mainshaft holder bolt more than 60 degrees after the needle of the dial gauge stop moving. Applying more pressure with the mainshaft holder bolt could damage the transmission.

13. If the reading is with in 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.

Standard: 0.11 - 0.18 mm (0.004 - 0.007 inch)
(Example) Measure reading: 1.93 mm (0.0759 inch)

Subtract the total clearance measurement from the middle of the clearance standard 0.14 mm (0.0055 inch)

1.93 - 0.14 = 1.79 mm (0.0705 inch)

Select the shim closest to the amount calculated, for example the 1.78 mm (0.0701 inch) 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.