7000 fuel pump leak
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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=138676
Printed Date: 26 Sep 2025 at 11:19am
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Topic: 7000 fuel pump leak
Posted By: Tim NH
Subject: 7000 fuel pump leak
Date Posted: 22 May 2017 at 7:35pm
I've noticed a weep getting worse on the fuel shut off shaft. It looks like I just need to order some seals and washers. But is it ever that easy. Tim ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Replies:
Posted By: Joe(TX)
Date Posted: 22 May 2017 at 7:42pm
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The shaft seals are o rings. Replacing them involves removing the shafts from the pump which normally involves removing the pump. ------------- 1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A |
Posted By: Tim NH
Date Posted: 22 May 2017 at 8:09pm
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That's about what I figured. Thanks Joe ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |
Posted By: injpumpEd
Date Posted: 22 May 2017 at 8:37pm
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those orings can be replaced without removing the pump, at least the shut off side. Any pump shop will have the oring. ------------- 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! |
Posted By: WF owner
Date Posted: 22 May 2017 at 8:38pm
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Has the pump been off recently? The Roosa Master pumps I have removed or installed had two seals (not O rings) on the shaft. If you aren't careful when installing the pump, the seals can get twisted. When that happens you get diesel fuel in the engine oil (crankcase). It may be possible to have an exterior leak, also, but I have never had that experience.
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Posted By: DougG
Date Posted: 22 May 2017 at 8:56pm
| Those are called umbrella seals on the shaft and there's a special tool to put them on correctly, that's all internal on the pump drive shaft and inside the pump tube, if this would cause the O rings he's talking about to leak the oil pan would be over flowing with diesel fuel, |
Posted By: MACK
Date Posted: 22 May 2017 at 9:00pm
| If you remove the screw and lever out of end of throttle shaft, shaft should come out. Have only found one out of a bunch that would not come out. MACK |
Posted By: Lynn Marshall
Date Posted: 22 May 2017 at 10:13pm
| You're talking about a couple of different problems here. DB pumps (180-185-190-200) use those umbrella seals on the DRIVE shaft. DM style pumps,( all of the 7000 series) don't. Yes, the umbrella seals can be tricky. The seals that Tim is talking about on the shut off and throttle shafts are just O-rings that can be changed fairly easily. The top on the pump needs to come off,then a J clip needs to be removed. The fuel shut off O-ring is the easiest, but the throttle shaft O-ring can also be replaced by doing what Mack says. I made a stubby ,bent allen wrench to do that job. They are common O-rings from the diesel pump shop. I also replace the top cover gasket. Hopefully you don't break off one of the three bolts that hold the cover on. Pay close attention as to the parts that have to come out so they go back correctly. Extra clean is also good. |
Posted By: lowell66dart
Date Posted: 23 May 2017 at 6:57am
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Google You Tube Roosa Master and see if that helps. ------------- AC 6080 (8030,7060,200,175,D-17HC, 6040,160,6140 all gone) Farmall 1066 & 656 Hi-Clear (for sale), White 2-62 High Clearance, JD 4255 Hi Clear. |
Posted By: Adam Stratton
Date Posted: 23 May 2017 at 7:48am
| I am far from a professional but a similar Roosa on one of our L2s did that a few years ago. AGCO had the o-ring for a reasonable enough price and I was able to put it in without removing the pump. I think I took the screws out to remove the top of the pump on the combine so I was able to see a little better but it wasn't a big deal. Good luck! |
Posted By: Tim NH
Date Posted: 23 May 2017 at 6:36pm
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Thanks everyone for all the advice. I'm going to PM Ed for parts. Tim ------------- 1950 WD 1959 D14 1955 WD45 1976 7000 B 207 |