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View Full Version : Turning a 4bt up


SSpeeDEMONSS
10-01-2011, 09:53 AM
It is in a gradall construction forklift. I have pics of the injection pump and wondering if I can turn it up a little.

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jkidd_39
10-01-2011, 12:13 PM
I have the same material handler! Good luck


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9724VF350
10-01-2011, 10:34 PM
Fuel screw is sort of right above the pump solenoid, sticking out of the back of the top cover. Same as 1st gen dodge trucks. Remove the seal, loosen the jam nut, turn the screw in 1/2 to 1 turn, readjust idle speed and high rpm speed. Easiest to see in the 3rd picture.

SSpeeDEMONSS
10-01-2011, 11:03 PM
Ok, ill try to circle the adjustments I see and if you can please tell me which each is.

Garrett

Probably getting paid at work to post this from my D1

oldestof11
10-02-2011, 12:53 PM
3rd pic, right below where the fuel return line makes the bends to be closer to the head, is the full power screw.

SSpeeDEMONSS
10-02-2011, 01:39 PM
this one? only 1/2 to 1 turn in?

https://lh3.googleusercontent.com/-gXX_zo6Mjqg/ToivQyPzv5I/AAAAAAAABIw/rnFKgFjkyqw/s640/4bt%252520pump.jpg


Garrett

SSpeeDEMONSS
10-02-2011, 01:41 PM
also, i assume the idle screw is right above it in the pic, but which is the high speed screw? the other one on the left?

Garrett

oldestof11
10-02-2011, 02:48 PM
Yes to all 3.

SSpeeDEMONSS
10-02-2011, 02:51 PM
What if I go more than 1 turn? Runaway?

Garrett

Probably getting paid at work to post this from my D1

G1625S
10-02-2011, 03:54 PM
They can run away if turned up too far, yes. Also remember that the HP rating in equipment is usually set so that you don't break parts...

Cumminsfever
10-02-2011, 04:05 PM
I would go 1 turn and see what happens.
Interesting to see a non-aneroid pump on a turbo engine. It should be quite snappy!

SSpeeDEMONSS
10-02-2011, 04:24 PM
Not trying to make huge power. I just want a little more.

Garrett

Probably getting paid at work to post this from my D1

SSpeeDEMONSS
10-02-2011, 06:00 PM
I would go 1 turn and see what happens.
Interesting to see a non-aneroid pump on a turbo engine. It should be quite snappy!

How do you be quite snappy when you weigh 20k+

Garrett

Probably getting paid at work to post this from my D1