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Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 1166
Experience:  Technican turned service manager with multiple lines of equipment and rental units.
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I just changed a fuel injector pump on a Caterpillar 360c

Customer Question

I just changed a fuel injector pump on a Caterpillar 360c machine runs but at full throttle shuts down
JA: What is the complete model and serial number of your machine?
Customer: 320C *cat0320cjpab07801*
JA: Are you fixing this yourself? What have you tried so far?
Customer: we replaced it orginailly and the pump had leaks but machine ran fine, than we reorder the part from Yancy (Caterpillar) and reintalled it. changed all fuel filters cleaned the lines and the tank
JA: Anything else you want the construction mechanic to know before I connect you?
Customer: no thats about it
Submitted: 8 months ago.
Category: Construction and Road Equipment
Expert:  catmastertech replied 8 months ago.


Have you checked the charging voltage?

Do you have any fault codes?

Customer: replied 8 months ago.
no fault codes
Customer: replied 8 months ago.
Expert:  catmastertech replied 8 months ago.

Have you checked the charging voltage?

Customer: replied 8 months ago.
how do i check the charging voltage,
Expert:  catmastertech replied 8 months ago.

Just connect a volt meter to the battery post on the alternator and ground cable on the alternator or near it.

Overvoltage will shut down ECMs when the voltage exceeds 32 volts. This could cause power loss to the control and shut the engine off.

I have also seen a loose connection on the terminals of the key switch cause the machine to shut off randomly.

Customer: replied 8 months ago.
I did have to jump the machine initially , but afterwards when we go to full power, machine shuts off, and runs hot. Than when we start it , it takes a minute but it starts on its own
Expert:  catmastertech replied 8 months ago.

I have also seen the fuel screen hidden in the transfer pump often missed. This is located in the suction fitting bolt at the transfer pump on the side of the injection pump. I suspect this should be clean but, any debris can plug the small screen inside the banjo fitting bolt.

Customer: replied 8 months ago.
No that's cleaned and we cleaned before hand.
Expert:  catmastertech replied 8 months ago.

Ok, I am all out of ideas I will OPT-OUT so other may help you.

Customer: replied 8 months ago.
Does running hot have anything to do with the timing off when we put the pump on?

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