Chain Lubrication - Stihl MS 341 Shop 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 losing chain oil
Oil pump delivers insufficient oil
MS 341, MS 361, MS 361 C
Cause
Oil tank empty
Oil inlet hole in guide bar is
blocked
Intake hose or pickup body clogged
or intake hose ruptured
Sealing ring between oil pump and
crankcase faulty
Valve in oil tank blocked
Teeth on pump piston and/or worm
worn
Sealing ring between oil pump and
crankcase faulty
Oil pump damaged or worn
Adjusting screw and/or control
edge on pump piston worn
Oil pump worn
Remedy
Fill up with oil
Clean oil inlet hole
Fit new intake hose and pickup
body
Remove oil pump, fit new sealing
ring and reinstall pump
Clean or replace valve
Install new oil pump
Remove oil pump, fit new sealing
ring and reinstall pump
Install new oil pump
Fit new adjusting screw and/or oil
pump
Install new oil pump
11