Fit the caged ball bearing

Engine, clutch and transmission 2^#53

Note position of selector fork guide pins (A) and neutral switch pin (B)

A Selector fork retainer plate (A), selector drum retainer plate (B)

B Withdrawing the selector fork shaft from the casing

30.5c Seletor fork identification letters and fork shaft

Remove the selector drum

30.7a Unscrew the cam retaining bolt...

guide pins on the forks locate in the grooves in the selector drum (see illustration).

5Unscrew the bolt securing the selector fork shaft retainer plate, located next to the selector cam (see illustration).Note how the retainer plate fits. Support the selector forks and withdraw the shaft from the casing, then remove the forks (see illustration).Once removed, slide the forks back onto the shaft in their correct order and way round (seeillustration).

6 Unscrew the bolt securing the selector drum retainer plate and note how the retainer plate fits (see illustration 30.5a).Slide the selector drum out of he crankcase (see illustration).

7 If the selector cam has not already been removed from the end of the selector drum,

pass a steel rod through the drum to hold it while unscrewing the cam retaining bolt (see illustration).The cam locates on a pin in the end of the selector drum. Remove the pin for safekeeping (see illustration).

8If necessary, pull the caged ball bearing off
the end of the selector drum (see
illustration).

Inspection

9Inspect the selector forks for any signs of
wear or damage, especially around the fork
ends where they engage with the groove in
the pinion. Check that each fork fits correctly
in its pinion groove. Check closely to see if the
forks are bent. If the forks are in any way
damaged they must be renewed.

10 Measure the thickness of the fork ends

and compare the readings to thespecifications at the beginning of this Chapter (see illustration).Renew the forks if they are worn beyond their specifications.

11Check that the forks fit correctly on their shaft. They should move freely with a light fit but no appreciable freeplay. Measure the internal diameter of the fork bores and the corresponding diameter of the fork shaft. Renew the forks and/or shaft if they are worn beyond their specifications. Check that the fork shaft holes in the casing are not worn or damaged.

12 The selector fork shaft can be checked for trueness by rolling it along a flat surface. A bent rod will cause difficulty in selecting gears and make the gearchange action heavy. Renew the shaft if it is bent.

30.7b... and remove the cam locating pin for safekeeping

Date: 2016-01-14; view: 544