Waterman Fuel Pump Rebuild Issues

wobbler · 11/25/15, 8:52 PM

Recently had a Waterman 400m Sprint Pump flowed (at great expense here is Australia) and found it was no longer in specs. I have since bought and installed a new set of gears and spacers and now the pump is all but locked up and takes considerable amount of effort to turn with a wrench. Is this normal for a new or rebuilt pump?

I am concerned that damaged may be done if I install it like it is back on my engine??

Any knowledge or experience with similar issues would be greatly appreciated.

treecitytornado · 11/25/15, 11:31 PM

It shouldn't turn that hard! Definitely not right!

jdperform · 11/26/15, 9:32 AM

You must lap the back side of the thrust plates to get a proper fit. Yes you will lap the coating off. You need a micrometer to measure how much you remove. You take no more than .0002 (that's 2 tenths) at a time. Then recheck when proper you will feel a slight drag.

wobbler · 11/27/15, 7:36 AM

Thanks JD. Sounds like a tedious task but not a difficult one.

Thank you.

11/25/15, 8:52 PM	#1 Waterman Fuel Pump Rebuild Issues
wobbler Member Join Date: Jul 2007 Posts: 189	Recently had a Waterman 400m Sprint Pump flowed (at great expense here is Australia) and found it was no longer in specs. I have since bought and installed a new set of gears and spacers and now the pump is all but locked up and takes considerable amount of effort to turn with a wrench. Is this normal for a new or rebuilt pump? I am concerned that damaged may be done if I install it like it is back on my engine?? Any knowledge or experience with similar issues would be greatly appreciated.

11/27/15, 7:36 AM	#4
wobbler Member Join Date: Jul 2007 Posts: 189	Thanks JD. Sounds like a tedious task but not a difficult one. Thank you.