Re: 756 Diesel is Hard Starting

Posted by Brian on April 07, 2004 at 18:58:34 from (12.37.227.203):

In Reply to: 756 Diesel is Hard Starting posted by Dennis on April 05, 2004 at 16:38:17:

I used to work on the fuel systems for these tractors a couple years ago. Yes, they can be rebuilt and yes it's not cheap. But it's far cheaper than a new pump. Also the injectors need to be looked over closely and not just reset.
Compression should be around 300 psi on a cold engine. Make sure the valve lift is correct as this affects air movement in and out of the cylinder.
The "advance" cable you are talking about is actually the overfueler for the pump by pulling out to the first stop is overfuel, pulling out against the spring load on the stop is the shut off.
A good sign that the pump needs work is that the motor doesn't try to shut down at high idle when going down a hill or wants to rev higher than spec rpm's.
What color of smoke do you have at start up? White smoke on a cold engine is usually a clue that there might be a compression or air flow problem.
I hope this helps

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