What's on your bench today?

[billpierce]

On my bench...my lap top.......... busted the screen.....got a new one off eBay, came in two days, took it apart without breaking anything, new one fitted and bingo....£40 and the jobs a good one!

Much nicer than doing phone screens

[peatff]

Iphones after the 4s are not bad to do. I've done a few 6 and 6s and they are a doddle.

[billpierce]

I have broken so many and then broken the replacements whilst installing fairly often . Hateful, but more convenient then getting it fixed in a shop

[spudulike]

A lot cleaner than chainsaws that's for sure! Did the battery on my phone a while ago, keep the tech going that bit longer!

[openspaceman]

1 hour ago, peatff said:

Iphones after the 4s are not bad to do. I've done a few 6 and 6s and they are a doddle.

Samsung S5 wasn't too difficult once the hair dryer had softened the glue.

[spudulike]

Good for adjusting the shades as well

[JT6120]

First time post but decided I would add to the whats on the bench post as I think it seems like a very open way of sharing what you’re up to chainsaw wise

So here goes

A friend of mines 365xt on the bench with a scored looking piston 

cylinder off and this is the observation 

piston looks bad cylinder looks perfect 

very strange

[openspaceman]

Not really strange looks like the rings lightly seized and damage was caught before it got worse, Nikasil is harder than the cast iron rings and both are much harder than the piston.

 

I'd still wipe the bits of bore with caustic soda get just in case there has been any aluminium pick up and lightly run some wet and dry (150??) round the bore for a bit of oil retention.

 

As always you should establish what caused it to nip up.

 

Depending on how much use you expect to get from the saw either a new piston and rings or for light use just rings  and clean the skirt as the piston ring lands look undamaged. Given a small difference in price between a new pattern piston and just rings being small when carriage is factored in...

 

 

 

 

[spudulike]

Yup, looks like a light seize that has been cleaned up by continuing to use the saw. As above and I always just fit a new piston as once the saw is apart, the cost difference isn't massive and it will give you more life out of the saw as well as better performance.

[JT6120]

The case gasket appears to have failed as the bar oil is leaking under the exhaust 

This led me to the hypothesis that this may also be the cause of the piston issue

with potential ingress of bar oil into the crank case

had to split the case to replace gasket and was surprised to find three case bolts were not tight 

once split I am convinced bar oil is getting in to crankcase