leaking studebaker US6 fuel pump

Trucks used by the U.S. Army in world War II that were 2.5 tons and larger. Such as Studebaker US-6, International M5-6, 4 Ton tractors (Auto Car, etc.), 5 Ton (Corbitt, etc.), the Dragon Wagon, and any other trucks 2.5 tons and over.
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sixbysix
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leaking studebaker US6 fuel pump

Post by sixbysix »

I have a fuel pump that is starting to leak from a small hole on the underside of the fuel pump body
I am guessing the diaphragm has gone although at this stage i can start and run the truck ok
can anyone give me a heads up on likely problem and where i can get a diaphragm if needed
sixbysix
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Re: leaking studebaker US6 fuel pump

Post by sixbysix »

maybe I've answered my own question?
I have just had a look at an NOS pump I have had it dent have the hole or "port that my pump on the truck has - the "hole " mentioned looks perfectly round and is about 2-3mm in diameter or perhaps 3/16 - 1/8 of an inch - like it may have had a plug or some such in it - being alloy I can't imagine it would have "rusted" out - any comments welcome
sixbysix
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Re: leaking studebaker US6 fuel pump

Post by sixbysix »

oh and thats "doesn't" have a hole in it - Not "dent"
Bill_Wolf
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Re: leaking studebaker US6 fuel pump

Post by Bill_Wolf »

Due to the danger of leaking gas I would take it apart and inspect.

While apart I would also replace the rubber with a Viton style diaphragm material that is compatible with Ethanol mixed fuel. Kits from the past get eaten up by the "new" gas.

I have done this on several of my vehicles.
1945 GMC DUKW
1942 Chevy 125 Crash Truck from Dow AAFB,
1944 Chevy 325 Fire Truck
1942 WC-54 Ambulance
1944 M29C Weasel (x6)
1945 CCKW 353 A2 Open Cab "Air-portable"
1943 M5 High Speed Tractor
1942 Sperry Searchlight setup with GE Generator
1942 M-1 Fruehauf Searchlight Trailer (G221)
1942 M-17 Fruehauf Quad 50 Trailer (G221)
1942 M-10 Ammo Trailer (x3)
194? Steel Ben Hur (x4) 194? Wood Ben Hur (x2)
1945 Case VAIW-3 Aircraft Tug
1943 Case VAI USAAF with Mower
1944 Clark CA-1 Airborne Dozer
1944 PE-95G, 1944 PE-99B
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