706D oil pressure

Our 706 diesel has about 25 psig oil pressure after a cold start. After it"s warmed up it runs with 5-10 psig. This seems pretty low. Oil pumps are pretty reliable, is there anything else I should check before taking the leap for a new oil pump?
 
I'd first put another gauge on it to verify pressure.

Chances are that you're dealing with bad engine bearings rather than a faulty oil pump. Drop the pan, pull a cap and inspect.

Allan
 
PA Steve I agree with Allen here. You haven't said if you have had this tractor a long time or a somewhat recent acquisition! either way there is a Possibility the screen on the pump is stopped up Too! So dropping the pan is a great first check. .......
I bought a 656-LP, about 2 yrs ago, Owner died, tractor left of dead as the estate was settled!
Got it home First thing I did was drop the Pan. Besides the 2 inchs of "Black Cream Cheese-Nastiness" in the bottom of the Pan....The Screen was 3/4 clogged up with I don't know what! OBTW it wasn't stuck, Washed out the bottom end , before I tuned it up and it is a rock solid old girl now for me! ....
A thought I bought a used 4x4 over 20 yrs ago. The Last one in the country.....There was a reason! driving it home the Oil pressure (according to the gauge) 0-ed out let it set a few minutes restarted it and the Oil pressure was strong and went to 0 again as I,pulled in my drive. It was Paraffin-ed up with Dammed ol Penzoil, ....... Flushed it with Dsl and it held pressure just fine. ........
My point is the pressure is either Flow related or your bearings are just about shot and Dropping the Pan is your best place to start.
Sorry if I am too wordy, long & drawn out!
Hope it helps!
Later,
John A.
 

This motor was just overhauled - it has new rod and main bearings, sleeves, pistons and rings. The head was also totally gone over. We did not put new camshaft bearings in it. I got another pressure gauge and saw the same response. I took the leap for a remanufactured oil pump and it made no difference. There isn"t much left to check. I checked the relief valve spring in the filter housing and it looks fine too. Not sure what else to check. Sorry it took a while for the response. Thank you for the help!
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top