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Dismantle Chainsaw


wig's Avatar
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03-22-06, 02:56 PM   #1  
wig
Dismantle Chainsaw

My Chainsaw, an MS 170 STihl, has a problem on the oil feed and the oil leaks out from the underside aswell, I looked and I see a small oil feeder pipe on the underside at that point.

Trouble is the large black handle which wraps around the whole machine is on the underside stopping me from getting to the oil feed pipe.

I have removed the three rubber plugs, but they are all double ended and I can only access one side of each one so the handle is still being held in place. If you look at a pic of a stihl saw you will see round circles on the black handle, these are what I'm talking about.

I have disconnected the trigger from the throttle arm and I have deduced that once I can get these three rubber mountings on the handle removed the whole engine block should just slide out from within the black handle cradle assembly.

Has anyone here got knowledge on how to proceed please? I have hosted an image of an MS170 with the three mountings highlighted in red. But really you either know how to do this or you don't and if you know then you don't need the pic, but it's there anyway.

Or can you point me to somewhere where this info can be obtained.



Last edited by wig; 03-23-06 at 01:19 AM.
 
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03-24-06, 02:58 AM   #2  
I see no one has posted with first hand knowledge nor can I be of help. I've never had one of these apart that far. I'd suggest finding your local Stihl dealer and pick their minds. But stay tuned here, someone may have some insight eventually.

 
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03-28-06, 07:33 AM   #3  
wig
Ok,

I just pressed ahead regardless. I found that by twisting the engine block within the frame I was able to remove the rubber mountings, such that the rear of the engine block (the trigger hand held end) is pulled to the left (when viewed from the trigger end) and the front of the engine block (the chain end) is moved to the right whilst helping the rubber mount to pass through the hole with a screwdriver. The end result is that the rubber mount at the front remains on the black handle, and the two rubber mounts at the rear remain on the engine block.

When it is released the block just slides out from within the black handle.

I aim to use a bit of oil on the rubber to aid refitting, and hope it all goes ok. I have now to dismantle, clean & inspect the engine block to see if I can work out what is wrong and how it can be fixed.

Cheers

 
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03-28-06, 02:30 PM   #4  
Phew! Good luck.

 
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04-05-06, 07:12 AM   #5  
wig
Hi again,

I have access to the oil feed thingy now on the underside of the machine, I think there might be a blockage, but I don't understand what I'm looking at, the oil feed pipe fits into this hole, and in the hole there is an internal metal thread but the hole isn't really open (the hole doesn't go anywhere) edit: there might be a tiny hole inside the thread - The only thing I can think of is when the engine is running there is a valve which gets sucked open ???

I have a pic of this small round hole here (not very good pic) Edit: In the pic it looks like there is a small hole in the very centre this is not the case, there might be a small hole at the bottom on the sidewall of the threaded hole.

<a href="http://imageshack.us"><img src="http://img223.imageshack.us/img223/5605/chainoil6ru.jpg" border="0" width="352" alt="Image Hosted by ImageShack.us" /></a>

Link for above pic


I have seen other comments about using comressed air to clean the oil feed, do I just blow air into this small threaded hole?

Thank you.


Last edited by wig; 04-05-06 at 09:40 AM.
 
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