John Deere 790 Bent Pushrod

After sitting all winter the tractor would not start and I thought it was not getting fuel. I poured some fuel in the intake and got it to start. It would not stay running so I did this several times.

I later found out it was the "PTO" fuse which I guess did not allow it to get fuel. Once I replaced the fuse the tractor ran but had no power. My friend thinks that the excess fuel probaly bent a pushrod or valve.

Is it a big job to repair something like this?

Any help would be appreciated.

Bob

That will give you a better idea of where to start.

I'm not sure how pouring some fuel directly into it caused a bent push rod... Especially no just a teaspoon... Unless you had a valve sticking from other causes maybe...

Are you sure there are no intake or exhaust restrictions?

Or also - I had a rat eat a hole in the intake air hose which caused it to lose all power on the top end, since the turbo could'nt build any pressure.

Howard

Hopefully I'll get lucky and it won't be major!!!

Thanks for the help

Bob

You probably blew the head gasket out.

Sadly, you have just created a potential for more damage than a full can of ether sprayed up the intake.

The tractor runs and feels as if I am missing one cylinder. I can still run a 5 foot bush-hog but it will bogg down a whole lot sooner than it use to. It doesn't run hot and doesn't smoke so I'm hoping I got away with just a small amount of damage.

I put about a teaspoon of fuel down the intake.

Are they fairly simple to work on? Can I pull the valve cover off and get to the pushrods and see what is going on?

Thanks for the response.

Bob