i have a 2000 freightliner boom truck, it has a 3126 CAT. we started it up, let it set for bout 10 minutes and ran fine. went to move it and it died, now it wont run at all but it cranks good. any ideas? not to familiar with the fuel system on this CAT either. thanks!

 

check fuel shut down silinoid

 

have you tried all the usual things changing the fuel filter making sure it has fuel and the fuel supply or shutoff solenoid has power not trying to be rude just trying to figure out what you have done

 

Where is the fuel shut off solenoid at on these engines?

 

Make sure you have over 11volts while cranking, if you do then chances are there is an HPOP/HEUI problem.

 

the fuel solenoid is on the side of the fuel pump and should have three wires running off of it and one should be hot when the key is on so take your test light or multi meter and check to see if you have power to it if it dont start looking for bad wires,bad fuses, bad circuit breaker.if the juice is there and you cant here it clicking with the turn of the key then you might need a new one the caterpillar part no is 8c-3663 and i hope this helps you to get back in business

 

heres a simple idea. make sure filters are tight, and make sure primer on pump is secured and gasket is not letting air through on the primer. have had that problem before on the 3126.

 

JHAYS: I also have a 3126 that will not start. Tried everything, but not sure where the primer is located. Can you point me to it?
Thanks