update on 706 bought at a sale

Central Illinois · Dec 14, 2014

I drained the oil on my 706 with the 263 gas engine and only some water was in the pan and no coolant. That tells me I had condensation. I pressurized the radiator and the head gasket is leaking externally on the front. I put in fresh oil and ran the tractor up and down the road to warm it up and then let it set there and run. The more it runs the better it runs. There is no blow-by and the engine is very responsive. This leads me to believe the engine is probably in good shape. My next move is to pull the cylinder head and have it checked at a machine shop. If the cylinder liners look good they are staying in. I did notice the front crankshaft seal is leaking. I am planning on replacing it after I get the head gasket straightened out. Is there enough room to replace it without doing a front split? It looks a little tight up there.

Old-F20 · Dec 14, 2014

id just warm it up again and re-torque the head and see what happens. might fix it

todd hamilton · Dec 14, 2014

I agree. If you are not getting any steam out of
the blow by or smelling antifreeze it's not leaking
into the crankcase. Those 263 engines are a little
touchy for valve adjustment. If it's running that
good I wouldn't be to quick to pull the head off.

Cory Schmidt · Dec 14, 2014

If your going to try and replace the front seal. you need to pull the front end. There is no room to get tools in, or get the parts (crank pulley, timing gear cover, ect) off. If you have a hoist or loader tractor you can take the rad/ front end/axle off as an assembly. Drain the coolant; disconnect power steering lines(under frame rail), radiator hoses, and hydraulic cooler lines. Be sure to mark the Hyd. cooler lines there's a check valve on one of the lines. Block up engine/back of tractor remove 4 bolts each side and slide out front end. (for ones with wide fount there are also 3 bolts underneath that hold the yoke ball)

John A · Dec 14, 2014

Central Ill., If You are going to do anything all take 1 hr and drop the Pan. Gingerly tap on the pan to break it loose, Perhaps the gasket will stay in one Piece.
Wash out the pan, Oil Pump and Screen! See it there is anything obviously, metal in the bottom of the pan, "the 2 inches of black cream cheese" in the bottom of the pan, Sludge build up, Metal filings! In general inspect the bottom end.
Them reinstall the pan, if all looks as good as you think!
Centex Farmall put Me on to this little trick, & I am a sold-out Believer as a First step in getting and older engine going that has been neglected, abandoned, Left for dead! for most any extended period of time!
Before you pop the Head off, Run a Compression check Just to Know!! First dry, Second, wet w/ oil! Hope this helps!
Later,
John A.

update on 706 bought at a sale

Central Illinois

Member

Old-F20

Member

todd hamilton

Member

Cory Schmidt

Well-known Member

John A

Member

Similar threads