Bypass m923 fuel pump?

[Cobra2401]

hi. I have a m923. I was wondering if anyone could tell me the proper steps to temporarily bypass the fuel pump? Thanks

 

[Suprman]

I'm more of an A2 guy but I don't think you can bypass the lift pump and expect the truck to operate as intended.

 

[Cobra2401]

Yeah. There's a round knob that you can turn in to bypass the electric fuel pump so the truck will not run off the fuel pump. I just don't remember the process. If you just turn that round little knob and that's it etc?

 

[Suprman]

You want to bypass the fuel cut solenoid on an nhc250 engine? So it will run with a dead battery? There is a thumb screw on the front top of the fuel solenoid housing. Yes turn the knob.

 

[Floridianson]

Do you have a M923A6 or M923A7?

 

[Cobra2401]

M939

 

[Cobra2401]

Bypass fuel pump on m923

Hey, was wondering which way you turn the thumb screw to bypass the fuel pump. I can't remember. Thanks

 

[Tinstar]

Did you forget about your other thread?

 

[Recovry4x4]

Both threads merged.

 

[Csm Davis]

Hey cobra they are going to rag on you if you do multiple threads and don't give good nomenclature for what truck you are referring to, see M939 is the series of which there are 3, M939 which is the basic small tires and non turbo 250 cummins, the M939A1 which is big tires 14.00x20 and non turbo 250 cummins, and the M939A2 which is 14.00 tires and turbo 8.3L cummins. Now within each of these series there are different models such as the M923, and a M923A1 and the M923A2, which are all the same basic style cargo trucks but for the differences listed above.

 

[Cobra2401]

Sorry, I didn't realize I did 2 separate posts. Also to clarify. ....I have the M923