BRP-Rotax
Maintenance Manual
Effectivity 912/914 Series
Edition 1 / Rev. 0
72-00-00
page 69
May 01/2007
d02622
3.11.7) Washers
See Figs. 72-73, 72-74 and 72-75.
Carry out a visual inspection of the washers for damage and wear.
The wear must be measured radially with a dial gauge, starting from the
reference area (on the inner part of the valve spring support) in
measuring range radius (1) and working towards the outside. Dimen-
sion t=max. 0.04 mm (0.0016 in.). see Fig. 72-75. Pounding (wear) of
more than 0.04 mm (0.0016 in.) is not permissible. If the dimension
exceeds this limit, the valve spring support, the valve spring retainer,
the valve cotters and the hydraulic valve tappet or any other damaged
components must be replaced on the affected valve.
◆ NOTE: The valve spring support can indicate a malfunction of
the valve train as a result of badly or insufficiently
vented hydraulic valve tappets. Under normal condi-
tions, no measurable wear will be seen, even after
longer periods of operation. If a visual inspection
reveals pounding wear on the contact surface, the
current wear must be tested using a dial gauge.
See SI-912-018 or SI-914-020, “Purging of lubrication system”, latest
issue.
„magnified image“
05449
05451
05450
„magnified image“
1
Fig. 72-73
Fig. 72-74
Fig. 72-75
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