Sthl 039 help

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Joined
Jan 2, 2012
Threads
1
Messages
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Location
East L.A.
I'm sorry for the new thread, but I haven't been able to find anything about the 039...





Join Date: Jan 2012
Location: East L.A.
Posts: 2


039?
I'm a new troll, out from under the bridge... It seems I'm the only guy here with a 039 model. I've had this thing for over ten years of reliable service, and I've worked it hard if not every day (3rd bar, lost count of chains). The chain oiling has quit. I've taken it apart and looked at the nylon drive gear-that looks good with no damage. Even after cleaning the metal gear on the pump seems to bind a lot when I try to turn it with my finger or the nylon gear. Isn't it supposed to rotate freely both directions? After all was reassembled I cranked it with the blade off and some oil came out but not any kind of regular flow, just intermittant surges. Everything in the tank looks clean. Some oil does seem to be coming from the bottom of the saw case and clutch area. Any ideas? I even tried adding clean motor oil to see if the detergent would held clean out the lines/passages.
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01-05-12, 04:36 PM #124 60DRB
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Join Date: Jan 2012
Location: East L.A.
Posts: 2


...also, when I had the pump out to clean/check found it already was adjusted for max oiling.

Talked to the only dealer in the area (re: parts & prices)...not sure of their abilities. He said to use an impact driver to remove the clutch. He also said to use the cord in the park plug hole when I asked about a piston stop tool. "Our guys do that all the time and never have any problems..."

I did use the cord method, but pulled the muffler off first to ensure the cord was clear of the exhaust port.
 
The 029 and 039 use the same oil pump and the same design.

If you use impact driver, you better plan on buying a new flywheel and/or a clutch spider. The risk is yours to take.

It sounds like you have a bur on the threads of the oiler gear or your pump is bad. The gear should roll smoothly through the entire revolution. If it is getting hung up, the inner bore of the pump has a groove in it from a piece of debris being wedged between the pump piston and the pump housing.
 

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