Specifications
Chapter 1
Engine,
clutch and gearbox
25
12 Dismantling the engine/gearbox
clutch assembly and crankshaft pinion
unit: removing the
1 Lift out the clutch pushrod together with the cup in which it
seats, then remove the four bolts which secure the clutch
thrust plate, unscrewing them in a diagonal sequence until the
clutch spring pressure is released. Lift off the thrust plate and
the four clutch springs and place them to one side.
2 Remove the circlip which retains the outer half of the clutch
centre, then remove it, followed by the clutch plain and friction
plates. The inner half of the clutch centre can now be lifted out
followed by the clutch drum, noting the special thrust washer
interposed between the two. The crankshaft pinion can simply
be slid off its splines once the filter has been removed.
13 Dismantling the engine/gearbox
gearchange shaft and mechanism
unit: removing the
1 The gearchange shaft runs in a bore through the crankcase,
emerging on the
left-hand
side of the engine. The complete unit
can be withdrawn from the right-hand side of the unit, the
quadrant centring spring disengaging from its locating lug.
2 Unscrew the detent roller arm retaining bolt and carefully
release the detent spring pressure before withdrawing the bolt,
arm and spring. Note how the arm rotates against spring
pressure on the shouldered portion of the bolt's shank. Remove
the camplate retaining bolt from the end of the selector drum
and withdraw the camplate, noting that it is located by a small
pin which should be removed to prevent its loss.
Fig
.
1.4
Clutch assembly -
component parts
;
2
3
4
5
6
7
8
9
10
Clutch drum
Clutch centre outer half
Friction plate — 5 off
Plain plate - 4 off
Clutch centre inner half
Thrust plate
Pushrod seat
Pushrod
Splined washer
Circlip
11
Bolt -4 off
12
Plain washer - 4 off
13
Spring - 4 off
14
Journal ball bearing
Fig.
1.5
Gear selector mechanism
/ Right hand selector fork
2 Centre selector fork
3 Selector fork shaft
4 Selector drum
5 Camp/ate
6 Detent roller arm
7 Detent spring
8
Gearchange shaft
9 Selector plate
10 Spring
11
Centring spring
12 Neutral
switch contact
13
Thrust washer - 2 off
14 Bolt
15
Bolt
16
Circlip
17
Circlip
18
Dowel pin
19
Left hand selector fork
20 Spring
21
Steel ball