bpr Rotax 912 i Series, Руководство по обслуживанию, Страница: 191 / 458

Effectivity: 912 i Series
Edition 1/Rev. 0
d
053
45.
fm
MAINTENANCE MANUAL
BRP-Powertrain
72-30-00
Page 9
July 01/2012
DISASSEMBLY
DISASSEMBLING THE CYLINDER HEAD
The cylinder head should be disassembled on a
clean surface. There must be enough space to
lay out the removed parts to ensure that all the
parts can be laid out and allocated according to
their installation position.
ROCKER ARM - REMOVAL
Fig. 9
VALVE - REMOVAL
See Fig. 10 .
NOTE:
There is a valve stem seal only on the
intake valve.
Fig. 10
m
WARNUNG
NOTICE
Danger of consequent damage to engine!
During assembly, the valves and all the asso-
ciated components must be re-installed in their
original position.
Mark the valves and the associated compo-
nents correspondingly before removing them.
m
WARNUNG
NOTICE
The rocker arm shaft should never be forced
out.
Step Procedure
1 Pull out the rocker arm shaft and take out
the two rocker arms.
1. Rocker arm shaft 2. Right rocker arm
3. Left rocker arm
m
WARNUNG
NOTICE
Before taking out the valves, remove any burrs
on the valve stem to avoid damage to the stem
seal or guide. Mark the valves accordingly.
Step Procedure
1 Compress the valve springs using the
valve spring mounting device part no.
877380 and valve spring collet.
2 Removal of the valve cotters.
3 Release the valve spring tension.
4 Remove the valve spring retainer and
valve springs with the washer and pull out
the valve.
5 Repeat this process for the second valve
and clean the cylinder head.
1. Cylinder head assy. 2. Valve spring collet
3. Valve spring mounting
device part no. 877380
4. Valve cotter