Re: 966 Injection Pump

Posted by K.B.-826 on July 06, 2006 at 22:02:06 from (24.180.143.24):

In Reply to: 966 Injection Pump posted by chadd on July 06, 2006 at 17:05:46:

The change from 96 horsepower 2400 rpm rated speed/2600 rpm high idle to 100 horsepower 2600 rpm rated speed/2800 rpm high idle was made sometime during 1974. Since your pump says 2600 high-idle, you've got an earlier '74 96-hp pump. With your serial number, your tractor should have been one of the very last built in '74. Your pump was probably replaced with the wrong one at some point, or your whole engine was replaced with one from a junkyard. Do you know the history of the tractor? Better back up and start over. Injectors must not be replaced one at a time, they all need to crack within 50 psi of each other. Pull all of your injectors and send them to your local fuel injection shop. As far as pumps go, I have learned that the best way to deal with them is to have them calibrated on a test stand. It'll cost you a little money, but you'll know it's right. Tell the pump shop you want it set 10% over the factory setting, that should give you 110 give or take a couple depending on what kind of shape your engine is in. Better yet, just get a new correct pump for your engine. Make sure your throttle linkage is moving through it's full range. Pull the valve cover, set the valves, and watch to see that all of your valves are moving. I worked on a 4010 Deere once that was missing on #2. Pulled the injector, found it to be very bad. Had the injectors rebuilt, thought my problems would be solved, but it still had a miss that would clear up above idle. Removed the valve cover, and found the rocker arm for #2 intake valve broken. The miss would clear up at high speeds because the valve was actually being sucked open.

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