Picked up a 915A2 truck out of Barstow w/ no keys and wasted batteries. I had it flat bed it to my yard where I replaced batteries and new ignition switch. It has Detroit Series 60 and Allison auto w/ 29k miles. It originally would not start and the ether injection was empty. I checked fuel/water separator and fuel filter and they where almost empty. The fuel tank was full when I received truck so I figured it was ran empty and parked. I filled both filters with fuel and gave it a quick shot of ether and it came to life. It will run about 5 mins and then dies and sounds like it is running out of fuel. I removed the fuel filters again and they were almost empty again. I bought new filters figuring maybe they were sucking air by the orings. I filled the new filters w/ fresh fuel, installed them and started the truck. Same thing runs maybe 5 minutes and runs out of fuel. The fuel gauge reads 20 psi at idle and that according to TM 10 should be at about 30-40 psi. I tried to locate a TM 20 and was not able to find one. I have a TM 10 and found someone posted a TM 24 but need to fault trace fuel system first before I will need a parts list. If someone has a TM 20 they can post or give me a link to one it would be greatly appreciated. If someone has a TM 9-2320-363-20 (I believe is the shop manual I need) for sale please PM me. If anyone has any hints or advise that would be greatly appreciated.
Thanks in advance
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Up to my my eyeballs in OD green steel
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Derrickl112
This system has a supply and return w/ injectors under valve cover there are not individual injector lines like on the 6.2. I had it running twice for about 5 mins until it ran the fuel filters out of fuel.
Castle Bravo
Thanks I forgot about that source even though I had Jatonka bookmarked
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Up to my my eyeballs in OD green steel
TOO much to list
Derrickl112
This system has a supply and return w/ injectors under valve cover there are not individual injector lines like on the 6.2. I had it running twice for about 5 mins until it ran the fuel filters out of fuel.
Castle Bravo
Thanks I forgot about that source even though I had Jatonka bookmarked
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Up to my my eyeballs in OD green steel
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The problem sounds like fuel not getting to the filters. Start with the basics; check the fuel line from the first filter back to the tank. There could be a kink, loose fitting, a pin hole in a line, whatever. Then pull the pickup tube from the tank and make that it is there and not cracked or broken. If those steps don’t find the problem disconnect the fuel line at the first fuel filter, connect the pickup tube to the line outside of the tank. Blow air thru the line to make sure it is clear and to check for leaks. Use soapy water or something like spray nine on the lines and fittings.
To confirm that it is the supply line causing the problem try running the engine off a remote fuel supply, like a jerry can strait to the fuel filter.
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Ron
Gainesville, Ga. vietnam-1/66-8/68
"Technical Manuals are the path to Illumination...
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42 5t? autocar tractor, gone
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Fuel path is tank, primary fuel filter, mechanical fuel pump, secondary fuel filter, injectors. Primary filter is full. Secondary filter is empty. Loosened up secondary filter and cranked over no fuel. Looking at fuel pump and it has orange silicone on the gasket. Orange silicone not O.E. looks like someone had it off/replaced. Orange silicone in my experience is a dead giveaway that someone has been there.
Does anyone know what the small fuel lines that make a loop with what looks like a solenoid valve between the fuel pump outlet and the secondary filter outlet does? Bypass??
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Up to my my eyeballs in OD green steel
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915a2 help
