View Full Version : How to change fuel filter without losing prime ?

11-03-2012, 04:46 PM
I have a 1976 Newell with a Cummins diesel engine. The fuel filters are standard screw-on canister type. They are hanging above the level of the motor

Is there any way to change them without losing the prime?

Cliff Robinson

11-03-2012, 06:28 PM
Welcome Cliff,

Just Fill the filter as full as you can and thread it on. Fire the engine up and use a fair amount of rpm right from start. Presto change-o and no priming nightmare. Good Luck

11-03-2012, 06:36 PM

This might be overkill for you, but i've found it saves me a lot of headaches. You can insert a little 12 volt rattle pump from NAPA in-line before (or even after) the filter and prime it that way. Disconnect the fuel line on the out-side of the filter, turn on the pump and purge the air out that way. Have a container to catch any fuel that comes out, reconnect the hose and you are air free.


11-03-2012, 07:35 PM
Our '82 has a Pneumatic Governor. Like stated above prime the new filters but I also use the auxiliary compressor to make sure that I can use the throttle.
Like Sean said Presto Change-o!

11-08-2012, 07:26 PM
I followed the advice given by you members and my filter change went flawlessly.