Stihl MS 461 - Valve

75MS 461, MS 461-R
An uprated oil pump (increase oil
flow rate) can be identified by the
slot (1) or the annular groove
(arrow) on the pump piston.
11.4 Valve
A valve is installed in the tank wall to
keep internal tank pressure equal to
atmospheric pressure. Always
replace a defective valve.
Removing
– Open the cap and drain the oil
tank, b 1
– Remove the side plate, b 5.2
– Use a 5 mm drift to carefully
drive the valve out of the
crankcase from inside the oil
tank.
219RA472 TG
1
VA
176RA242
Installing
Check correct installed position.
: Insert the new valve in the
crankcase bore (arrow).
– Use a 5 mm drift to carefully drive
the valve into the crankcase bore
from outside – note installed
depth.
: New valve must be recessed
to a depth of 1 mm +/- 0.1 (a).
Reassemble all other parts in the
reverse sequence.
3443RA428 TG
219RA479 TG