WD-9 Injector Pump Removal

WD9ER · Feb 23, 2012

I am attempting to remove the fuel injector pump to clean the crud out from behind the pump. I have removed the access on the front face of the engine block and am able to view the pump timing. What else do I need to remove to pull the injector pump? There is a nut in the dead center that I assume hold the shaft to the gear, but when I attempt to loosen it, the engine turns over. I could hold the engine with the engine crank, but I want to ensure that I am able to remove it and get the engine back to the correct timing. Is this easily accomplished or going to be a pain to get the timing set correctly? I am just removing it for cleaning purposes.

sflem849 · Feb 23, 2012

Before you take the big nut off take the three nuts/bolts out that you have to get at through the gear.

To get the big nut off pop the wrench hard and it will come off.

There are bolts going into the injection pump from both directions. Don't be fooled.

I would not take the pump off just to clean behind it. I have not tried to put a pump back on yet.

WD9ER · Feb 23, 2012

Why would you not recommend removing it? Do you have any recommendations on how to clean the 60 years of crud out between the engine block and injector pump in prep for paint?

sflem849 · Feb 23, 2012

Oven cleaner, engine degreaser, wire brush, scraper

I forgot the hot water pressure washer, but that is a given.

d282 · Feb 23, 2012

make sure you remember where the pump is timed before you take
off. Just for cleaning I would do what sflem849 said. He is currently
working on my former nine and having a ball

sflem849 · Feb 23, 2012

(quoted from post at 17:18:02 02/23/12) make sure you remember where the pump is timed before you take
off. Just for cleaning I would do what sflem849 said. He is currently
working on my former nine and having a ball

Yours was TDC.

WD9ER · Feb 25, 2012

Thanks for the advice guys! After a couple hours of brushing, the injector pump is clan without removal. Now i have another question, there is fuel leaking at the splined throttle input shaft. My service manual is not showing a service breakdown for the IH pump. Is there a seal internally that is replaceable?

sflem849 · Feb 26, 2012

The whole thing has to come apart to replace that seal. Is your pump overfull of oil/fuel? That will make it leak. There isn't supposed to be oil on that seal so it "shouldn't" leak. That is what the guy at Central Fuel in IA told me. Get you pocketbook ready if you want to fix that seal. It is $650ish to just put seals and gaskets in your pump (if there isn't a problem) and over $1000 to do an exchange. He said most of the time you are cheaper to do an exhange...

WD9ER · Feb 27, 2012

Thanks for the info sflem849. I think I can leave with a very minor leak and save $1000!

WD-9 Injector Pump Removal

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