D42T Governor / Fuel Tranfer Housing

Take note there are two identical o-rings sealing the fuel gallery of the injection pump housing. One is on the ferrule between filter tower and IP housing and the other is on a plug blocking the rear/governor end of the gallery.

I dont think the D4400's had a plug between the pump housing and the governor.

yup 9B1332 plug

Any thoughts on that tang rear lower right against engine block. There has been work there before so hard to say with what I found back there.

Thanks!
Bernie

Hi Bernie,
quite likely a wedge used to try and align the 1/2" drive 9/16" socket and a nut to the lower stud there--found odd tools in that location behind the fuel filter and injection pump before when working on these things.
Cat came out with a 3/8" drive 9/16" -- possibly P/No 8H 8564 -- a close coupled uni-joint socket that got in there really well. Prior to that it was a real fight to get the nuts started and tightened especially when I only had 1/2" drive gear.

Cheers,
Eddie B.

Hi EDB-
Ha! I’ll probably leave as it appears to be stainless-not a bit of rust and clears the housings, although how could there be with all the caked diesel and soot back there. It explains why someone left the two lowers off on the block side. I’m sure glad I went ahead and got into it. Getting ready to start pulling together a parts order list. Big help!

Bernie

I found it quite easy to undo that nut in the back by using a 1/4" drive long extension(s) with wobble ends. The nut itself undoes easily so the 1/4 handles it no problem. If it is a bit tighter, you can always use an adaptor and put a 3/8 ratchet on it

After cleaning off the grit and grime it looks like at some point something went through the block and repaired with welds. One other find was a plug that looked tapped into the side that was severely boogered up. I replaced it with what you see.

Behind the blind hole there is a fiber type coating on the backside of the blind hole. I think if I would have kept scraping at it, it would have gone all the way through.

Any thoughts on what it may have been for and if it had anything to do with the repair welds on the same side?


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