Mcculloch Chainsaw 700 Repair Manual
Now this piston business has got me interested in thinking about reviving the 850 I have residing in a box in my shed.I happened to find several used piston but noticed a new aftermarket sold by I think little red barn.It's listed as a B size by part number,doesn't have the bearings which really aren't a problem to find.I wonder if it's worth the effort to try it out. From what I understand the pin is a press fit in the rod which I suppose would take some heat on the pin end of the rod and a press of some sort or a pull bolt contraption. It would make sense the needle bearing cages would also be some kind of a press fit.Uncharted territory.I've never had a rod off a ten series piston assembly or any McCulloch for that matter. Now this piston business has got me interested in thinking about reviving the 850 I have residing in a box in my shed.I happened to find several used piston but noticed a new aftermarket sold by I think little red barn.It's listed as a B size by part number,doesn't have the bearings which really aren't a problem to find.I wonder if it's worth the effort to try it out. From what I understand the pin is a press fit in the rod which I suppose would take some heat on the pin end of the rod and a press of some sort or a pull bolt contraption.
It would make sense the needle bearing cages would also be some kind of a press fit.Uncharted territory.I've never had a rod off a ten series piston assembly or any McCulloch for that matter. Click to expand.For getting the pin out, an arbor press works well.
Mcculloch Chainsaw 700 Repair Manual Free Download
I bought one at HF, a 1 ton model. Made a block out of pine 2x4's cut about 4' long, stacked them and screwed them together, when grooved out, that surrounds the piston and fits snug to it. Then a hole drilled in the middle for the pin. Used a socket that was just under the size of the pin and put a pipe on the lever and pressed it out. You will need to clamp the press to the workbench with C-clamps. Acid baase equilibria study guide answers. And this was on a 790 piston/connecting rod assembly.
I did not use any heat. Just some penetrating oil. I'd be wary of using heat from anything but a hair dryer, heat gun, or propane torch.
No oxy/fuel torches. If you change the temper of the connecting rod, you're screwed and it will likely come apart later. At least, that's what my engineering portion of my brain says.
In thinking this over I have heat gun,good one,'Varitemp' 1000 degree industrial.Very similar to what is used in automotive engine plant Thinking out loud you could probably press the pin out but it would take some heat to reassemble.Freeze the pin heat the rod end perhaps.As far as those needle bearings I've seen them from 9 bucks a pop to two for 12 bucks.For that matter it's probably a standard needle bearing a person could get at Bearings Inc,Dixie or some other bearing house. It's mac # 11590 which coincidentally is the same as a 700 bearing.