STIHL 029, 039
11
Important:
In the event of trouble with the chain lubrication system, always investigate the other possible sources
of faults before disassembling the oil pump.
Condition
Cause
Remedy
Chain receives no oil
Oil tank empty
Fill up with oil
Oil inlet hole in guide bar
Clean oil inlet hole
is blocked
Intake hose or pickup body
Wash intake hose and pickup
(strainer) clogged or intake
body (strainer) in white spirit
hose ruptured
and blow out with compressed air;
replace if necessary
Valve in oil tank blocked
Clean or replace valve
Teeth on pump piston and/or
Fit new oil pump and/or
worm worn
new worm
Machine losing chain oil
Bore in pump
Fit new pump housing
housing worn
Oil pump delivers too
Control screw and/or
Fit new control screw and/or
little oil
control edge on pump piston
pump piston
worn
Bore in pump housing
Fit new pump housing
worn
2.5
Chain Lubrication