Note: Before assembling the backlash gear to the balancer shaft, lubricate all contact surfaces of the balancer drive gear, backlash spring and backlash gear with new engine oil which meets specification API SH (or higher) and JASO MA.
Note: Before fitting the balancer shaft to the crankcase, lubricate the rollers of the needle roller bearing with new engine oil which meets specification API SH (or higher) and JASO MA.
1. If the backlash gear was disassembled, fit the backlash spring over the shaft and position to the balancer drive gear, positioning the spring ends on either side of the peg.
2. Fit the backlash gear, ensuring its peg is located anticlockwise (viewed from the left hand bearing end of the shaft) of the balancer gear peg and also between the spring ends.
![](https://motoinstruction.ru/img/triumph/15/121274.jpg)
1. Balancer shaft; 2. Backlash gear; 3. Backlash spring
3. Fit the wave washer and secure all components in position with the circlip.
![](https://motoinstruction.ru/img/triumph/15/121275.jpg)
1. Balancer shaft; 2. Wave washer; 3. Circlip
4. Using a press and press bars, fit the right hand bearing to the shaft, with the circlip positioned nearest to the drive gear. Ensure the inner race of the bearing is supported when installing the bearing.
Warning!
- When using a press, always wear overalls, eye, face and hand protection. Objects such as bearings frequently break-up under load and the debris caused during break-up may cause damage and injury to unprotected parts of the body.
- Never wear loose clothing, which could become trapped in the press and cause crushing injury to the hand, arms or other parts of the anatomy.
5. Refit the washer and a new circlip to the shaft.
6. Lubricate and fit the left hand bearing and install a new circlip in the same orientation as noted prior to removal.
Note: Prior to installation in the crankcase, it is essential that the markings on the backlash eliminator and drive gears are brought into alignment against the tension of the spring. This will facilitate correct positioning of the balancer in relation to the crankshaft when both are installed in the crankcase.
![](https://motoinstruction.ru/img/triumph/15/121276.jpg)
1. Drive gear dot; 2. Backlash gear line
7. Using T3880106 - Balancer Gear Holder, bring the backlash and drive gear marks into alignment against the backlash spring as follows:
- Engage the peg of T3880106 - Balancer Gear Holder into a tooth of the backlash gear.
- Rotate the backlash gear against the spring until the marks align.
Note:
- When in alignment, the line on the backlash gear must be located directly above the drive gear tooth marked with a dot.
- Since the drive gear dot cannot be seen when the backlash gear is in alignment, always mark the dot-marked gear tooth with a paint mark in order that it can always be identified.
8. Secure the backlash gear in position with the fixture supplied with T3880106 - Balancer Gear Holder by placing the fixture pegs across two gear teeth (ensure that the fixture will not be in the way when assembling the balancer to the crankshaft).
![](https://motoinstruction.ru/img/triumph/15/121277.jpg)
1. T3880106 - Balancer Gear Holder; 2. Securing fixture; 3. Balancer backlash gear marking
Caution! If the balancer and crankshaft are not correctly aligned, severe engine vibration will occur leading to damage to components.
9. With the drive and backlash eliminator gear still correctly aligned, locate the balancer to the crankcase. Align the balancer gears and crankshaft as shown in the illustration below.
![](https://motoinstruction.ru/img/triumph/15/121278.jpg)
1. Balancer gear marking; 2. Crankshaft marking
10. Ensure that the right hand bearing circlip and dowel locate correctly in the corresponding groove in the crankcase.
![](https://motoinstruction.ru/img/triumph/15/121279.jpg)
1. Balancer shaft; 2. Securing fixture; 3. Balancer backlash gear marking
11. Ensure that the left hand bearing circlip and dowel locate correctly in the corresponding groove in the crankcase.
![](https://motoinstruction.ru/img/triumph/15/121280.jpg)
1. Balancer shaft; 2. Left hand bearing; 3. Circlip; 4. Dowel
12. Remove the securing fixture.
13. Check that the balancer and crankshaft are correctly aligned before continuing to assemble the crankcase halves.
Perform the following operations: