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Discussion Starter #1
I just installed a new CAT fuel filter and adapter about two months ago. It has given me nothing but problems, losing prime at least 50 times.

I don't know if there is a flaw in the filter or adapter. Has anyone else had a similar issue with this setup? Getting tired of priming this thing. I have checked everything obvious like bleeder screw, o-rings, etc and don't see anything suspicious. Thanks in advance.
 

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Remove the assembly from the truck (2 hoses and two bolts).
After emptying it, block the inlet (finger, rubber plug, etc..). Operate the primer and verify that it holds suction.
 

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Discussion Starter #3
Ok, I will try that. If it does not hold suction, does the filter head need to be rebuilt?
 

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It mean you have air getting in somewhere likely the filter head. You might need a new one over a rebuild. I rebuilt my filter head twice after I continue to lose Prime after the first rebuild. The second time I bought a higher-quality kit thinking that was the problem. It still leaked, so I hot a new one.

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Discussion Starter #5
Thank you. It has been losing prime probably every 20 times it is started. Stalls immediately. Then I pump up the primer and fire it up. Never had problems like this before with this truck.
 
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