10 MS 210, MS 230, MS 250
4.3 Chain Lubrication
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 is
blocked
Clean oil inlet hole
Intake hose or pickup body
(strainer) clogged or intake hose
ruptured
Wash intake hose and pickup body
(strainer) in fresh STIHL cleaner or
replace if necessary
Valve in oil tank blocked Clean or replace valve
Oil pump damaged or worn Install new oil pump
Machine losing chain oil Oil seal leaking Replace oil seal
Bore in pump housing worn Install new oil pump
Oil pump delivers too little oil Oil pump worn Install new oil pump