B ... and remove the clutch housing

of the teeth can be achieved by inserting a screwdriver into the holes in the gears and twisting it (see illustration).Remove the clutch housing (see illustration).

11Use a steel rod and a block of wood to
lock the oil pump sprocket against the
crankcase (see illustration).Unscrew the
sprocket bolt and pull the pump sprocket,
chain, drive sprocket and clutch
housing sleeve off the input shaft (see
illustration).

Inspection

12Check the teeth of the primary driven gear on the back of the clutch housing and the corresponding teeth of the primary drive gear on the end of the crankshaft. Renew the clutch housing and/or drive gear if any teeth are worn or chipped (see Section 16 for removal and disassembly of the primary drive gear).

13After an extended period of service the clutch friction plates will wear and promote clutch slip. Measure the thickness of each plate using a vernier caliper (see illustration).If the thickness is less than the service limit given in the Specifications at the beginning of the Chapter, the friction plates must be renewed as a set. Also, if any of the plates smell burnt or are glazed, they must be renewed.

14 The plain plates should not show any signs of excess heating (bluing). Check for

warpage using a surface plate and feeler gauges (see illustration). Ifany plate appears warped, or shows signs of bluing, all plain plates must be renewed as a set.

15Measure the free length of each clutch spring (see illustration).If any spring is below the service limit specified, renew all the springs as a set.

16 Inspect the clutch assembly for burrs and indentations on the edges of the protruding tabs of the friction plates and/or slots in theedge of the housing with which they engage. Similarly check for wear between the inner teeth of the plain plates and the slots in the clutch centre. Wear of this nature will cause clutch drag and slow disengagement during gear changes, since the plates will snag when the pressure plate is lifted. With care, a small amount of wear can be corrected by dressing with a fine file, but if this is excessive the worn components should be renewed.

17 Check the release plate, release bearing, and pushrod for signs of roughness, wear or damage, and renew any parts as necessary. Check that the bearing outer race is a tight fit in the centre of the plate, and that the inner race rotates freely without any rough spots.

18 Measure the clutch housing sleeve inner and outer diameters, and the diameter of the transmission input shaft where the bush fits. Compare the measurements to the

specifications at the beginning of this Chapter and renew the bush and/or the shaft if they are worn beyond their service limits.

19 Check the needle bearing in the clutch housing for signs of roughness or wear, and renew if necessary.

20 Check the pressure plate for signs of roughness, wear or damage, and renew if necessary.

21 Check the anti-judder spring and spring seat for distortion, wear or damage, and renew them if necessary.

22 Check that the clutch release shaft rotates smoothly in the engine cover and that the return spring operates properly. With the pushrod in place, the spring should be under slight tension. If the action is rough or stiff, draw the shaft out of the cover and inspect and clean the bearing surfaces (see

Date: 2016-01-14; view: 778