Chain Lubrication - Stihl MS 460 Service 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
10
Cause
Oil tank empty
O-ring on oil line in crankcase seat
faulty or oil line damaged
Oil inlet hole in guide bar is
blocked
Intake hose or pickup body
(strainer) clogged or intake hose
ruptured
Valve in oil tank blocked
Teeth on pump piston and/or worm
worn
O-ring on oil line in crankcase seat
faulty or oil line damaged
Bore in pump housing worn
Control screw and/or control edge
on pump piston worn
Bore in pump housing worn
Remedy
Fill up with oil
Remove oil pump, fit new O-ring
and refit oil pump or install a new oil
pump
Clean oil inlet hole
Clean suction hose and pickup
body (strainer) with a little standard
solvent-based degreasant
(containing no chlorinated or
halogenated hydrocarbons) or
replace if necessary
Clean/replace valve
Install new oil pump and/or new
worm
Remove oil pump, fit new O-ring
and refit oil pump or install a new oil
pump
Fit new oil pump
Replace control screw and/or oil
pump
Fit new oil pump
MS 460, MS 460 C