JCB 3C111 engine very hard to turn over by hand. 1978 JCB 3C111 is all I know, no other id on the machine. I took the

Hi, I'm Wayne.

I'll be assisting you with this issue today.

Thank you for coming to Just Answer

Your Question is as important to us as it is to you.

I am sorry to hear you are having this issue.

I go offline between 3-4 Pm CST. M-F

Weekend 2-3 pm CST

Not sure what you are asking here?

Wayne

Hi,

Thank you for the response.

Sorry for the delay, I was called out.

OK, now I see what you are saying.

Well, I would say the piston is frozen to the walls of the cylinders.

Or the hydraulic pump is frozen. I suggest disconnect the pump from the engine and go from there.

See if it is the pump or the engine. I suggest pouring -34 oz of diesel fuel in the cylinders

let soak and see if that helps free it up.

I hope this helps you.

Wayne

Hi,

Thank you very kindly for the 5 stars..........

Wayne

Hi Steve,

I am offline now but do check in at times.

You are going to need to bite the bullet and pull the pistons out and clean the cylinder bores.

Wayne

HI,

You are very welcome..............

Stay safe and healthy!!!

Wayne

Morning Steve.

Yes, remove the oil sump and head and pop the pistons out.

May have to jack the engine up 2-3 inches to get sump off.

Wayne