Stihl 4137 Series, Manual, Page: 24 / 58

23 Series 4137 Components - HT
:
Pry the retaining ring out of the
fan housing.
– Slip the retaining ring off over the
AV sleeve.
VA
936RA235
:
Push the service tool (1)
4126 893 4900 into the AV
sleeve as far as stop.
:
Tighten down the clamp
screw (2) firmly.
:
If necessary, tighten the fixing
VA
936RA236
2
3
1
screw (3) moderately.
– Apply a few drops of
STIHL Press Fluid OH 723,
b
12, between the fan housing
and rubber element.
– Clamp the service tool in a vise.
:
Pull the fan housing off the rubber
element.
VA
936RA237
:
Loosen the clamp screw (1) and,
if necessary, the fixing screw (2).
:
Pull the sleeve (3) off the service
tool.
VA
936RA238
1
2
3
:
Pull the rubber element off the
sleeve.
VA
936RA239
Installing
:
Push the rubber element, tapered
end (1) first, onto the sleeve until
the flange (2) is behind the
sleeve.
– Coat the rubber element with
VA
936RA240
1
2
STIHL Press Fluid OH 723,
b
12.
:
Push the rubber element into the
fan housing so that the slot (1) is
on the round side (2) of the
housing.
VA
936RA241
2
1