bevanet

I was using my 813 to pack the road this weekend. The road is pretty steep, maybe a 12 degree incline. I was in 1st gear with the xfer case in low and maybe 1500 rpms. A couple times when I went up an area where the soil was a bit soft and the wheels sunk in a little (5 inches or so), I smelled a pretty distinct buring smell. I didn't feel the truck slip at all, but I can't think of anything else besides the clutch slipping that would smell like this. My clutch pedal has about 2 inches of free play. Just wondering if anyone else has smelled this under an increased load, and if it is the clutch or something different?

Wildchild467

you just changed the oil... you get the engine up to temperature and maybe its getting hotter burning off any oil that may have spilled during an oil change? Im just thinking outloud.

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Tom

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hippiedude

If it smells like burning brakes and the brakes are not sticking than your clutch is slipping .........watch you tack. to see if your rpms increase when you get that smell again .........Something is getting hot .............. Tim

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1952 GMC XM211 w/w

poppop

If its slipping in that low of a gear it is in bad shape. Put it in high and maybe third gear. Hold the brakes and let out the clutch. If the engine stalls then it is not the clutch.

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dmetalmiki

It's suprising when crawling / working slow, just HOW much heat wafts up and over otherwise unefected bits! When winching I have smelt "things" hot, It usually passes on driving away. Check cloth covered wired rods and cables. Check Oil spills / drips / leaks etc.. Me thinks you COULD NOT induce clutch slip in low first gear. Never did rate the "put it against the wall and drop the clutch theory". Seen perfectly servicible clutches tear the rivits and beak the shock springs....

On the other hand there are walls and there are walls! lol

thttp://www.youtube.com/watch?v=qS3mAtzBc1Mhat way!.

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M543A2

There was a test for clutch holding for Allis Chalmers tractors. It said to set the throttle at an RPM I do not remember, but it was considerably high, drop the clutch in high gear with the brakes held and time the interval taken to kill the motor. If the time was longer than specification, the clutch needed replaced.
I also am not a fan of this procedure, but it was the recommended test. I test them by having the truck in high gear on the road at around 30 to 40 MPH, floor the accelerator and see if the tach spools up faster than normal for the speed increase. You will also hear the motor speed increase more than it should. A really bad clutch will let go and the motor will wind up quickly. Watch for over-speed in that case!
Regards Marti

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Warsaw, Indiana
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M543A2

Another thought; do you have free-play in the clutch pedal? There should be no resistance in the pedal for one and one half to two inches travel before you feel the resistance of the throw-out bearing touching the pressure plate fingers. If you have no free-travel, the throw-out bearing could be holding the clutch partially released. In that case, adjust linkage until you have free-travel.
Regards Marti

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Warsaw, Indiana
3 M-880 Pickups
2 M-200 Trailers
3 M-105 Trailers
2 M35A2 Deuces
1 M-139 5 Ton Bridge Truck
1 M-543A2 5 Ton Wrecker
2 M-51A2 5 Ton Dump Trucks
1 M-52A2 5 Ton Tractor
3 M-135/ M-211 Deuces
1 IHC T-9 SeaBees Dozer
1 M-313 Shop Van
1 M-689 Shelter Dolly Set
1 M-715 1964 Jeep

bevanet

Thanks for all the input on this. If I remember correctly I think I smelled the burning smell the day before I changed the oil as well as after. It does smell a bit like burning brakes. I agree that it should be hard to slip the clutch in low-low. There is about 2 inches of pedal free play, so I think the adjustment is ok. I'm pretty sensitive to the sound of the engine and I didn't hear it rev up like it was slipping. I really don't want to stress test it, because I probably only drive 20 miles a year, so If I can put off fixing it for a few years that would be great. It looks like a big job!

I also noticed that my engine water temp crept up to about 230 degrees. There is only about an inch of coolant in the bottom of the "can" on top of the engine when hot. What level should it be? The coolant looked clean, so I'm wondering if it is low on coolant or the thermostat is stuck and that made the engine hot enough to make something stink. The outside air temp was about 55 degrees the truck was empty, so doesn't seem like it was working very hard.

rumplecat

I don't think your engine should be heating up with no load, even in low. I drove mine 300 miles from a GSA site in Mississippi at around 70 degrees and when I ended the trip the water in my radiator was cool!
James

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OPCOM

First couple of times I went on a road trip in the deuce, I smelled, heard, and felt so many things that I was in a state of anxiety at times. All those things were revealed to be perfectly normal except maybe that banjo music and squealing off in the distance during a 40MPH night pass through the twisting back roads of Kentucky.

Additionaly the clutch if bad will slip more in the high gears than low. When I drove from Dallas to Chester, IL, I had just had the transmission serviced and it was too full. When it became hot and the oil expanded some would get into the clutch and it would slip, but only at a certain higher percentage of throttle. That instance was discussed in a topic and experts replied, perhaps one of my road trip topics, would have been the 2009 road trip. I suppose 54REO has drained a bit of the gear oil out by now since he owns the truck??

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