4000 diesel pump filter

Dave91

New User
Hi all,

Someone told me there is a small nylon filter under the return fitting on the rear of the CAV pump fitted to my diesel 4000 - year 1974. The filter is under a fitting which connects the pipe that takes fuel back to the filter head.
What does the filter do? Does it filter debris which comes from the inside of the pump as it wears to stop it returning into the filter head?

Thanks,
Dave91
 
You were told wrong, the safety screen is at the pump INLET. It should never have anything in it IF the filter is working correctly. The return is on the side of the pump on the two bolt side cover, and a small bleed line on the back of the control cover.
 

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