Correcting squish on McCulloch cylinders

[farminkarman]

This is my first time doing this, so I figured I would try to document the process. After measuring the squish on this cylinder at 0.052”, I started by cutting 0.032” from the base. This looks the same as any other non-clamshell jug.

 

[farminkarman]

Then I mounted the cylinder to my fixture after getting the fixture zeroed out. That is where I ran out of time. Next will be re-cutting the bearing pockets and the retaining ring groove.

 

[heimannm]

600 Series, which model by the way?

Mark

 

[farminkarman]

600 Series, which model by the way?

Mark

This one is a 610

 

[Lowey79]

I have just acquired a lathe and have a MS390 I want to play with, so I will be watch this space very closely…

I refuse to bow to the “you can’t mod a clammy” movement!

Love your work so far.

 

[heimannm]

In my experience there is a noticable difference between the thin ring and thick ring versions of the PM610 saws, problem is the thin rings and pistons are getting hard to find.

I will also add that a healthy thin ring 600 Series saw is already at 200 PSI compression, that one may be even higher when you are done. Start looking for the aluminum starter pulley...

Mark

 

[farminkarman]

In my experience there is a noticable difference between the thin ring and thick ring versions of the PM610 saws, problem is the thin rings and pistons are getting hard to find.

I will also add that a healthy thin ring 600 Series saw is already at 200 PSI compression, that one may be even higher when you are done. Start looking for the aluminum starter pulley...

Mark

It will be interesting to see where this one ends up.

 

[Maintenance Chief]

Subbed

 

[huskihl]

Then I mounted the cylinder to my fixture after getting the fixture zeroed out. That is where I ran out of time. Next will be re-cutting the bearing pockets and the retaining ring groove.View attachment 375569

You guys and your big lathes….

Greg best get ready for the 039 insurgence

 

[farminkarman]

You guys and your big lathes….

Greg best get ready for the 039 insurgence

I think I will pass on that, lol. Thankfully my fixture only works for macs.

 

[Redfin]

Then I mounted the cylinder to my fixture after getting the fixture zeroed out. That is where I ran out of time. Next will be re-cutting the bearing pockets and the retaining ring groove.View attachment 375569

How bad does that shake?

 

[farminkarman]

How bad does that shake?

It doesn't shake at all...I run it with the back gear, so it spins really slow.

 

[Redfin]

What rpm you think its spinning?

 

[farminkarman]

What rpm you think its spinning?

I would have to check for sure, but I would guess 60rpm

 

[Red97]

I'm sending my 450 rancher

 

[Redfin]

I would have to check for sure, but I would guess 60rpm

What rig are you running there?

 

[redline4]

This one is a 610

I've got a Mini Mac boxed up and heading to you monday...

 

[farminkarman]

I'm sending my 450 rancher

I've got a Mini Mac boxed up and heading to you monday...

I got a nice spot in the garbage can for them.

 

[farminkarman]

What rig are you running there?

The lathe is a Jet 10x20 iirc.

 

[Red97]

I got a nice spot in the garbage can for them.