113
Flywheel, flywheel cover
8
Check the axial run-out on the flywheel surface (B).
The axial run-out must not be greater than 0.03 mm
as a total reading on the dial indicator for every 25
mm radius of the flywheel (calculated from the cent-
er of the crankshaft to the tip of the dial indicator).
During this measurement, the crankshaft must be
pressed forward to prevent the axial run-out of the
crankshaft from affecting the reading.
MS2, 120S, HBW250, HS25
9
Install the elastic disc for the reverse gear (C). Ap-
ply Locktite 243 on the threads of the mounting
screws for the disc. Ensure that the small guide
section of each mounting screw goes into the fly-
wheel (C1). Tighten the mounting screws evenly in
stages to 9 Nm. Do not start the engine until the
locking fluid has hardened.
10
Install the drive components at the rear of the en-
gine.
Ring gear, replacement
(21A-01)
WARNING! Protective goggles must be worn
for this operation.
Check the position of the chamfering on the teeth
before removing the ring gear.
Removing
The ring gear can be removed using a hammer and
chisel to break off the collar. Make sure that the fly-
wheel is not damaged during this operation.
Installation
The collar is installed on the flywheel by heating it.
When a new collar is installed, ensure that it is not
heated above 250°C. Check that the chamfering on
the teeth is facing in the correct direction.
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