175 Allis Injection Pump
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=56645
Printed Date: 06 Sep 2025 at 8:04am
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Topic: 175 Allis Injection Pump
Posted By: AllyCat
Subject: 175 Allis Injection Pump
Date Posted: 10 Sep 2012 at 6:03pm
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The "End Plate" gasket/seal on the pump is leaking. Tightened 4 screws, but no change. I guess I will send to pump shop for repair. To remove pump I believe there are some bolts/nuts under the engine timing cover that must be removed. Do I have to remove radiator to get to these? Also, will removing bolts/nuts allow anything to fall down into engine? Thanks for any advice.
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Replies:
Posted By: Eldon (WA)
Date Posted: 10 Sep 2012 at 7:21pm
Just drain the coolant and remove the hose to get the cover off. There are bolts in there that have to come out in order for the pump to come off. Nothing will fall out of place....
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ALLIS EXPRESS!
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Posted By: injpumpEd
Date Posted: 10 Sep 2012 at 9:22pm
It is uncommon to see a CAV DPA pump leak there. Usually it's the throttle & Shut-off shafts. Very simple pump to pull and re-install. No internal timing marks to line up, just the dowel on drive gear, and chisel mark on mounting flange.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Posted By: AllyCat
Date Posted: 10 Sep 2012 at 9:54pm
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Thanks guys, you provided the guidance and confirmation I was looking for.
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