841 injector pump

JonB · May 24, 2019

Help!
The injector pump is leaking around the top seam, where the cap attaches. Apparently a seal has failed.
It looks pretty easy to take off, but I want to make sure. Also, it doesn't look like parts are easy to find for this pump. It's a Roosa Master. It runs ok so I don't want to have the pump rebuilt.
Thanks!

agjim · May 24, 2019

If you only want gasket/o-ring/seal for the cover that is held on with 3 screws and perhaps the throttle shaft o-rings they are available from your JD dealer if you ask for the parts for a 3-cylinder 820 that has a Roosa Master pump built back in the 70's or so. The cover seal is an easy fix, the throttle shaft seals is a little more involved. Cost of parts is about $15.

JonB · May 24, 2019

Well, I should have been clear. This is a Ford 4 cylinder 172 Cu In engine. The cover has 4 screws.
I was able to get banjo washers for it at the JD dealer today, though...

Larry NCKS · May 25, 2019

Parts are very easy to find for your pump. You can buy the basic seal kit on eBay for less than $40.00. Or you can go to your nearest diesel injection shop and by the seals you need . . . and for a lot less than a JD dealer will charge . . . and the pump shop will have them on hand.

My shop of choice - Midwest Diesel very friendly and helpful folks.

JDEM · May 25, 2019

What sort of 172 Ford are you finding with an injection pump with a four-bolt cover? I cannot say I ever seen such a thing. I have two of them. Rotary-distributor Stanadyne-Roosamaster with a three-bolt cover.

JonB · May 25, 2019

That's the pump.
4 screws, then. On top where the fuel line goes in.

Dieseltech · May 25, 2019

That's the transfer pump end cap..

JonB · May 25, 2019

That was pretty easy. I was worried that if I took the cap off, parts would fly all over the barn.
Had to remove 2 lines to get the cap off, and then just an o ring seal.
Thanks for the help.

JDEM · May 25, 2019

Cover takes three screws on any of the pumps I have seen on the 172 Ford. You have me stumped. Pump should be something like a Roosa Master/Stanadyne DBO-2933, DBGVCC429-4C, DBGVCC429-5C, DBGVCC429-8AJ, DBGVCC429-14AJ, DBGVCC429-4AJ, DBGVCC429-5AJ

Larry NCKS · May 25, 2019

(quoted from post at 12:55:57 05/25/19) Cover takes three screws on any of the pumps I have seen on the 172 Ford.

Give it up! You're talking a different part than the OP. His transfer case end cap, as has already been stated, bolts with 4 bolts! It could be called a cover.

Misael Cruz · Jun 8, 2022

Hello Sr, Im searching for more info on how to put together a roosa master fuel pump, DBGVCC429-4C. by ay change happed that you have more info about it?

841 injector pump

JonB

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