Diesel fuel in torque converter

fixerupper

Well-known Member
Been making some progress on the military vehicle restoration so it's come time to drain the old fluids and flush/clean things out.

This vehicle is a 1945 model M-4 High Speed Tractor, and it has a torque converter in the power train. I was reading the service manual and it said to use #2 diesel fuel in the converter. I read it again and found out I read it right the first time. Drained the converter and out came old foul smelling diesel fuel.

Have any of you old timers worked on a torque converter equipped machine that uses Diesel for the fluid? Maybe it's more common than I realize but it's the first time I've heard of this. Seems to me diesel might foam when it's whipped around like that but it must work OK or they wouldn't have used it. Jim
 
Some older Link Belt cranes used Diesel in their convertors. Twin Disc 3 stage if my recollection isn't faulty.

It will not foam if the convertor vessel is completely full of fuel as there isn't any air to whip into the fluid.
 
Heat Houser is correct on Link Belt with Twin Disc convertors. They also used a special fluid , Torque Fluid 11, which was similar to diesel with higher flash point. Another example is International TD24 w/ convertor. This was also a Twin Disc and drew fuel from the fuel system.
I would not consider it common though.
Dennis
 
Some of the old D8 Cat dozers used diesel torque
converters. They used it in the fuel system somehow. I am a retired equipment operator not a mechanic so I can't tell how it worked.
 
D815A used a fuel "torque converter", fuel from the tank went through the converter, then to the engine pump, and the excess went back to the tank, so the tank functioned as a cooler
 
Does that have a two speed or a lockup on the converter? The case-o-matic in Case tractors was made by twin disc.
 
I don't know if it has a lockup function or not. The instruction manual does show a deceleration function to hold it back going down a hill. It was not running when it went into my shop and everything that was supposed to move was rusted tight so I obviously I have not driven it.

This vehicle is tracked, it shares the same tracks as a Sherman tank. Engine is a Waukesha 817 cu. in. gas. It has a huge oil cooler for the torque converter that's the same size as the radiator, with 1 1/2" hoses going to it.

So far I've been concentrating on the tear-down, clean up, electrical and engine part of the project. Hope to have the engine back in in a couple of weeks, jerry-rigged to run so I can find out if the power train works. I HOPE IT DOES! Jim
 
Indian Motorcycles used the right side gas tank as a heat exchanger.Hot days would use a lot more gas cooling off that old Oilzum 50 weight! The gas tank had gas in one section of the tank and the crankcase oil in the other part.
 

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