Valve Spring Check; Washer Check - Rotax 915 i A series Maintenance Manual

ATTENTION
The ring-shaped print on the valve seat faces
of the valve seat rings must be continuous and
have no breaks. The width of the print corre-
sponds to the valve seat width CH02.
ATTENTION
If there are burn marks or distortion, the cylin-
der head must be sent to an ROTAX® author-
ised overhaul facility for overhauling or repair.
Figure 8.24: Typical
Valve seat ring
1
1
Figure 8.25
Valve seat ring
1
Effectivity: 915 i A Series
Edition 0/Rev. 0
BRP-Rotax
MAINTENANCE MANUAL HEAVY
2
Valve
06450

VALVE SPRING CHECK

Step Procedure
1 Check the valve springs visually for dam-
age such as fracture, deformation.
Figure 8.26
Valve spring
1

WASHER CHECK

Procedure
Step
1 Check the washers visually for damage
and wear.
The wear must be measured starting from the refer-
ence face (on the inner part of the valve spring sup-
port) radially outwards in the measurement region,
using a dial gauge. Dimension t = max. 0.04 mm
(0.0016 in).
Wear of more than 0.04 mm is not permissible. If this
value is exceeded, the valve, the valve spring sup-
port, the valve spring retainer, the valve cotter and
the hydraulic valve tappet or other damaged compo-
nents in the affected valve drive must always be
replaced.
72–30–00
Page 19
August 01 2018