Balance Shaft Gear: Service and Repair

INSTALLING DRIVE GEARS OF BALANCE SHAFTS

Note: Groove code "U" is omitted on drive gears.

Installing Drive Gear of Upper Balance Shaft

1. Woodruff key groove of balance shaft faces up.
Insert woodruff key.
Apply thin coat of Optimoly HT on bearing surface for drive gear.

Woodruff Key:

2. Push drive gear with groove code "0" on woodruff key.





3. Install collar that its locating tab protrudes into unmarked groove of drive gear.
Code "0" can be seen in large bore of collar. Install bolt and washer.
Coat threads of bolt with Loctite 574.

Installing Collar:

4. Tighten bolt while holding with Special Tool 9200.
Tightening torque: 45 Nm.





Installing Drive Gear of Lower Balance Shaft

1. Woodruff key groove of balance shaft faces up. Insert woodruff key.
Give bearing surface for drive gear a thin coat of Optimoly HT.





2. Push drive gear without a groove code on woodruff key.





3. Install collar that its locating tab protrudes into groove "0" of drive gear.
Code "0" can be seen in square opening of collar.
Install bolt and washer.
Coat threads of bolt with Loctite 574.





4. Tighten bolt while holding with Special Tool 9200.
Tightening torque: 45 Nm.