caterpillar injectin pump

[dieseldummy]

Does anyone know how to turn up an inline injection pump on a 3304 motor in a 930 Cat wheel loader? I have found what I beleive to be the screw, but want to be sure.
Thanks,
Justin

[a5150nut]

IIRC, been many years ago. The old D-9G had a plug and behind that was a screw. But all it changed was the high idle. We were running 3 of these tripple pushing a fleet of 651s and we had to keep tuned evenly so as not to disrupt our timming. Whipping and slinging 3 9s around in 3rd gear all day......Sure was fun!

The newer ones are computer controled I think.

[dieseldummy]

This loader is a '73-74 model which is deffinately mechanical. I took off the cover that was supposed to have wire through the bolts and it had a stud with a nut to lock it in place. It has a slot on the end which look like it is meant to be turned with a screw driver. there is a bolt below the stud which turns freely and doesn't seem to affect much, but I haven't run it after changing the postion so I don't really know.
Justin

[a5150nut]

All that sounds familure. I remember having to dummy up the seal so the master mecanic woudn't blow a fuse. But like I said, it is just the high idle. IIRC to accualy to turn up the pump it involved flow bench and drilling parts inside.
:eek:

[dieseldummy]

After looking closer the cover I removed has high and low idle adjustment marked on it. After doing some research I have learned that these are a hydraulicly acctuated governer which makes it hard to adjust the fuel rate without a test bench. Thanks for the info.
Justin

[B1powered]

I think the screw need to be screwed out on that pump.....In will reduce the fueling.
The hydraulic governor just limits top rpm.
If you're pushing hard and the rpm drops slightly, the rack will try to compensate to get the rpm's back up. That's where you'll get some serious pushing power.
The new ones are all electronic with a push button for low idle or fast idle.
Nothing in between, just the decellerator to control it.