Splitting the body on a saw for repair.

[arbaholic]

Evening hope everyones well.

 

Trying to learn as much as I can about saws repair wise etc.

 

Stripped every component of an old for parts 200t today and im know curious to know if you can split the body as if you was tring to access the piston.

 

I can see the gasket and the line all the way through the centre but it feels solid and didant budge even when I got mr hammer and chisel out. ( dont worry i have no plans of using this part again )

 

So it is possible to undo atall is my question.

 

All opinions welcome.

 

Thanks

[slack ma girdle]

P.M. spud u like, he seems to be a wizz with chainsaws.

[spudulike]

Get two wrecking bars in there either side of the rod - that will do it:thumbup:

 

The gaskets have a tendency to lock solid but Stihl, God bless em, hide a bolt under the rubber oil pump connector - been there and got the T Shirt! One is hidden under the dogs as well - just make sure they are all out before you start giving it some with the mallet - yes a MALLET and not a hammer:lol:

 

It is easy to do some damage to thin castings so go easy, sometimes holding one cover and hitting the end of the crank will break the seal - you could probably fabricate a tool but never needed one to date.

 

The MS200s crank bearings run directly on the crankshaft so new bearings sometimes won't help a noisy engine. If it isn't knocking, leave it well alone! Oh - make sure you fit the bearings the correct way round!

 

Five minute job.....easy!

[phirow]

hot air gun releases the bearing on the crankshaft; they are a press fit or tec speak tolerance fit

[Mesterh]

You don't need to split the body to access the piston, just remove the cylinder.

[spudulike]

You don't need to split the body to access the piston, just remove the cylinder.

 

He is of course correct - what is it you are trying to do?

[arbaholic]

ok thats been interesting to read thanks for the input

 

Im just trying to learn as much as i can about the mechanics etc of these little things. Will be usefull when it comes repairs.

 

Im interested to know at what point a saw is beyond repair, and if things like piston rings are realistically replaceable.

[spudulike]

Not too much isn't repairable, shortage of spares on older saws can stop them being repaired, the cost of spares also can make it uneconomical or limitations in your own skill.

 

Types of failure when it does a saw in are usually things like big end failure where the crank and cylinder are written off or a saw gettiing a direct hit by a truck or tree.

 

Typical crank bearing replacement, new piston, rings, carb, new cylinder, casings are all possible at a cost.

 

For the record - the piston is removed by pulling out one of the gudgeon pin retaining circlips and pushing the pin out and removing the piston and not splitting the cases.

[Beardie]

Im interested to know at what point a saw is beyond repair.

 

You're going to find out pretty quickly at the rate you're going!:laugh1: