freeing stuck diesel injector pumps

Robert Major · Oct 6, 2013

Hi
I brought 2 tractors yesterday, they have Perkins p6 motors in with CAV vacuum governor, inline pumps.
Both pumps are stuck on the racks, and have a couple of elements stuck also. The rest lift/drop perfectly, when I tried lightly lifting them with a small screwdriver.

I was wondering if there is something good I could soak the pumps in, that might free them up with a little carefull work.
Was thinking about PB blaster but thought I'd ask here in case something betters around, That you guys have tried.

I am fully aware that they should really go to the pump shop , but don't want to spend 100's on them right now, until I get the rest of the motors free and figured out.
Thanks for your time.
Regards Robert

JDemaris · Oct 6, 2013

I don't have any great faith in PB Blaster, but
I've freed up many stuck in-line pump plungers.
Depends on how bad and what made them get stuck to
start with. Had a few Fords with SIMMs that got
stuck from lack of oil. Pried loose with a
screwdriver, filled the oil box and away they
went.

If all depends on what part of the plunger is
actually stuck. The CAV pneumatic pump is
basically just a box holding a camshaft with
pistons riding on it. Note that if things don't
work out - all the new parts are available from a
place in England. $130 for all new barrels and
plungers. $40 for a new governor diaphram.

Robert Major · Oct 6, 2013

Hi
Thank for the reply .the pumps have sat a few years like 20 I guess. As far as i can tell that's all is wrong. Ive had the simms like that to. some you get lucky others are boat anchors. these are just the element plungers I think the cam followers are all free. the ones where the elements move are anyway.
Thats interesting about the parts. that pump rebuild would be 1500- 2000 with the parts round here. I wonder if it would be cheaper to send the whole pump back to the U.K ,even with shipping costs.
Regards Robert

JDemaris · Oct 6, 2013

The plungers were leaking into the cambox in my CAV DES inline pump. It ran it that way for a few year and finally bought all new barrels, pistons, and delivery valves and fixed it right here in my shop. Cost me less then $200. Got the stuff from Peter Slater in England.

http://www.pslaterfie.co.uk/index.php

Robert Major · Oct 7, 2013

Ok thanks for that

I have actually looked at his site online this year, seen his advert in a U.K tractor magazine I subscribe to here in Canada. will see what happens, and give him a shout if I need parts.
Regards Robert

freeing stuck diesel injector pumps

Robert Major

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JDemaris

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Robert Major

Well-known Member

JDemaris

Well-known Member

Robert Major

Well-known Member

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