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Hello Fellow MV'ers! My M923A2 was running like a top. Then it sat for a few months, and now, with a fresh set of batteries, it won't start. Engine is primed properly Cranks strong Turns over with ether, but won't continue to run without it There is no fuel leaving the fuel pump (I detached a...

Thanks, Simp5882! Well there's about 20 gallons plus in the tank, the fuel pump primes not a problem (I loosen the 10mm nut on the back side of the pump and pump the primer until it bleeds) but there is no fuel going to the cylinders when attempting to start. The kill switch is off, the throttle...

Hello Fellow MV'ers, I thought that I had seen buried in a maintenance or operators manual, a note that my M923A2 needed a minimum amount of fuel in the tank (10 gallons?) or it wouldn't start. But I can not find it anymore. Does anyone have any info on this? Thanks! mark

Hello fellow MV'ers, I've recently changed out my fuel injection pump (that fixed my starting issues) but my truck will not accelerate very well in forward gears. I tried to climb a relatively small hill and the RPM never gets above 1000 or so. She just bogs down and then essentially stops...

Will, Thanks! I'll check out the adjustment on the throttle lever, and chat with Gregg at Diamond Diesel as well, these guys know they stuff when it comes to turbos, injection pumps, anything fuel related. Great resource as is this forum. mark

Oops, re-reading my above post, the location to "bar" the engine is on the LEFT side of the engine, at the back, behind the primer pump.

I found the location to bar the engine. It's on the back of the engine block, at the flywheel, on the right side of the engine. There's a plastic cover plate, pop that off, but in the geared tool ($95, thanks to the guys at Diamond Diesel in Oakland for lending it to me!) and find top dead...

Hi Will, Thanks for the advice,...yes, go slowly or the plastic pin can break for finding TDC... The "damper bolts"...where are they? On the front of the flywheel? If so, they're not on center but I guess I could get them to rotate the crank if that's what you're talking about. Stand check my...

Hey Guys, I have a new fuel injection pump. The old one was a bear to get out (access to one bolt on the backside of the pump was very difficult). However, the new one is about to go in. It's the same pump with a slightly different governor but the guys at Diamond Diesel in Oakland Ca compared...

Truck won't even start now. Fuel injection pump removed for replacement or repair. Hopefully this will fix the driven end.

Gentlemen, When I get back home, I'm going to focus solely on the "drive end"...perhaps that may fix the driven end. Perhaps not. Not much left to check on the driven end. Perhaps the injector pump is failed, if there's fuel pressure, and timing, then that pump probably needs to come off...I...

The transmission is an Allison transmission, model MT564CR. I do not have power take off in this truck. The way I read the below quoted section of the maintenance manual: The valve is NORMALLY CLOSED. When the solenoid "is activated" it directs main oil pressure of transmission to the...

Hello TobyS, IMO, the tranny is not locked in 5th. Why not? When it was up on blocks, and put into gear, the RPM was 1500 and the "forward speed" was only 7 mph. I would think with that RPM in 5th, the speedometer would indicate a much higher speed because of the much higher speed of the...

Hello All, Happy Memorial Day, remembering my step dad and squadron mates who passed in the line of duty or after their service ended. Regarding the M923A2. Working hard to absorb as much and execute as much of the sometimes conflicting advice (all of it totally appreciated!) as best as...

Floridianson, The Lock in Solenoid was removed, and lines 4 and 8 in the photo were capped. Troubleshooting: The goal always has been to try to get the engine to start without ether. Perhaps that "fuel problem" will correct the transmission problem. However, when some say these problems are...

"The torque converter lockup solenoid is a known failure point for this kind of issue. The wires and their placement make them an easy target for mice and/or fraying. Check from the transfer case lever all the way to the lockup solenoid on the transmission. " SDonkey, during my troubleshooting...

Hey Guys (and Gals perhaps) Summary: (since I don't expect everyone to read the whole thread, start here...) Truck needs very small shot of ether to start. Truck lurches but does not move forward, with higher idle, can go backwards without stalling. Big picture: the truck had been run on...

Simp5782, thanks. Seems like an easy attempt. Now to identify what you're talking about and find it. The electric fuel solenoid was in the brush years ago, thanks! So is the solenoid for the 5th gear lock up...that's for trucks with winches or cranes only I guess.

...and of course I was very wary of running it and engaging the gears while it was on the jacks...simply the torque of those wheels spinning could have certainly taken it off the jacks. The truck is in an open field (on top of a hill)...the "killing spree" was a concern but the truck was heavily...

...and oh, one more note that was interesting to add to the above, when the transfer case was in neutral, and I shifted into Reverse, there wasn't the commensurate 200 RPM drop, just a very minor burp in the RPM before it shifted into Reverse and the shaft started moving... This is interesting...