Chain Lubrication - Stihl MS 441 Manual

4.3

Chain lubrication

In the event of trouble with the chain
lubrication system, check and
rectify other sources of faults before
disassembling the oil pump.
Condition
Chain receives no oil
Machine loses chain oil
Oil pump delivers insufficient oil
MS 441, MS 441 C
Cause
Oil tank empty
Oil inlet hole in guide bar
is blocked
Intake hose or pick-up body
clogged or intake hose ruptured
Valve in oil tank blocked
Tooth flanks of worm worn
Oil pump damaged or worn
Oil pump housing defective
Oil pump damaged or worn
Oil intake hose connection
damaged
Oil pump worn
Delivery rate of oil pump set too low Adjust oil pump
.
Remedy
Fill up with oil, check oil pump
setting if necessary
Clean oil inlet hole
Fit new intake hose and pick-up
body
Clean or replace valve
Replace worm
Install new oil pump
Install new oil pump
Install new oil pump
Fit new oil intake hose
Install new oil pump
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