18 ENGINE
-
Check grooved ball bearing
CD
for smooth operation and wear.
If the grooved ball bearing does not move easily or is worn:
-
Change the grooved ball bearing.
-
Check shift rollers
8
for surface damage and cracking.
If the shift roller exhibits surface damage or cracking:
-
Change the shift drum.
-
Check springs
0
of the shift rails for damage and wear.
If the spring is damaged or worn:
-
Change the spring of the shift rail.
-
Check shift rails (D on a flat surface for run-out.
If there is run-out:
-
Change the shift rail.
-
Check the shift rails for scoring, seizure marks, and stiffness in the shift fork.
If the shift rail has scoring, seizure marks, or does not move easily in the shift fork:
-
Change the shift rail.
-
Check sliding plate@ for wear on contact areas(!).
If the sliding plate is worn:
-
Change the sliding plate.
-
Check return surface
0
on the sliding plate for wear.
If there is severe grooving:
-
Change the sliding plate.
-
Check guide bolts @ for firm seating and wear.
If the guide bolts are loose or worn:
-
Change the sliding plate.
-
Preassemble the shift shaft. (
l!!JJ
p. 221)
-
Check clearance 4) between the sliding plate and the shift
304682-10
18.4.36 Preassembling the shift shaft
304683-10
quadrant.
Shift shaft - play in sliding
plate/shift quadrant
0.40 ... 0.80 mm (0.0157 ...
0.0315 in)
If the measured value does not meet specifications:
-
Change the sliding plate.
-
Secure the short end of the shift shaft in the bench vise.
Guideline
I
Use soft jaws.
-
Mount sliding plate
O
with the guide pin facing downward
and put the guide pin on the shift quadrant.
-
Mount pressure spring
8.
-
Slide on spring guide
CD,
push return spring
e,
with the
offset end facing upward, over the spring guide and lift the
offset end over abutment bolt
0.
-
Mount stop disk (D.
221
