Joseph Cummings
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Posts posted by Joseph Cummings
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From My front lot, I'll have to get some better pictures later
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19 minutes ago, blackdog2 said:Bought it for 12-K .....sold it for 25-K ran it 3-year's .....?
I had a 75 dm600 237 triaxle like 35 years ago. I think probably one of the best dump trucks ever made. Even when it was beat to death, it was still reliable as hell
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1 minute ago, Joey Mack said:I hope its not water..
It's a 2 valve 672 cubic inch block and heads. I haven't seen many of them get water into the cylinder. Sleeve is dry, and the heads don't crack into the water jacket much. I've seen some leak from the head gaskets, but that was external seepage
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Just now, Joey Mack said:
You dont suspect water causing white smoke? Of course i hope not...
Yeah, well there is the really suckiful stuff like that too
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On 4/5/2025 at 9:02 AM, mowerman said:
Accessive smoking was the original problem
Usually white smoke is late timing.
Could be a bunch of other things too. Cold, low compression, bad nozzle spray pattern, fuel contaminated with a bunch of gas will all make white smoke too
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Schnabel load. Looks like the dolly might be steerable.
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If a guy in a suit, and a fashionably dressed attractive woman on the TV said it, it has to be true
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48 minutes ago, 70mackMB said:
Biden Handed Out CDLs Like Candy... Now US Highways Are A Public Safety & National Security Nightmare
But he had to, because of the trucker shortage
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Chain drives were the planetary axles of their day. They put the final reduction right at the wheel. Just like a planetary the shafts coming from the differential didn't have to carry all the torque that was applied at the wheel. Not to mention, the axle the truck rode on could be solid. They had a lot of advantages for heavy haul. I think Mack only discontinued offering them in the mid 50's
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The guy was right
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3 hours ago, Mark T said:
🤔Thanks for putting that vision in my head of you driving a yacht Paul. Dressed up in all the proper attire for sailing.... some yacht rock playing in the background......
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On 3/27/2025 at 8:44 PM, cruiseliner64 said:
You have a tender way with words JC......
Paul
Well it just seems like today that to use some lube and to give a reach around isn't enough of a fucking over. This new breed of shyster wants to double fist everybody bone dry without even any spit
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14 minutes ago, Geoff Weeks said:That, right there is why I hate "puck" clutches, everything is tore up. heat checks, and material lost from the flywheel.
Hard to tell from the pictures whether the flywheel can be brought back or not. If it can, it will be thinner and less able to take the heat from the next clutch.
With a truck that is geared right, and a good driver, there really is no need for those. I've had trucks that have gone years in city service with organic lining and never even need an adjustment. New driver and within a month I'm turning the ring in a couple of notches. Not sure how they are using up so much clutch lining with a truck that has the gearing to walk away at idle grossing 120,000 or more
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Actually, those USPS bums lose more of my mail than they deliver and I'm not exaggerating. I'd put all those screw ups in refurbished Jeep DJ5s with brush paint, and the cheapest mold cure recaps I could buy on all four corners
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On 4/2/2025 at 9:53 AM, reb87 said:I think the builder of this wrecker used about 1000 pounds of welding rod to attach/repair.
I knew a lot of old timers with wreckers back in the day. They welded everything, and if something broke, they welded more reinforcements to it. No buying new steel either, always something they salvaged from the junkyard they had around back of their shop. I think it was because they lived through the Great Depression
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On 3/31/2025 at 11:13 AM, kscarbel2 said:
Why does an electric truck have a hood? Shouldn't it be a cab-forward design?
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1 minute ago, Vladislav said:
Ok, so actually it turns out the weights try to pull the fuel rack back but you add pre-load to the spring just by your foot moving the linkage further up?
Yeah, the throttle shaft controls the spring tension. The weights are fighting with the spring like a tug of war. The spring is fighting to increase the speed, the weights are fighting to decrease the speed. Putting your foot on the throttle makes the springs pull a little harder
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1 minute ago, Vladislav said:
Yes, I see. And I have that small cover removed from my pump at the moment. And saw that srew, I remember it. Just can't imagine how physically a srew which limits linkage that is supposed to move the rack can affect the rev limiting device.
If you sure that is that way and the matter is difficult to explain I can take this on trust and just experiment with the screw. Bad thing I didn't know that when the pump was on a test bench. Much easier to check than on a truck.
Moving the throttle shaft more increases the spring preload. The flyweights try to move outwards, and the spring tension pulls them back in. The centrifugal force pulls the weights out harder as the speed increases. The weights moving outward pulls the fuel rack back
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1 minute ago, Joey Mack said:
Yes. There is a dowel in the drive hub on the engine side, and a missing spline in the pump coupler.
Older ones with the steel coupler also had a dowel so you couldn't put it together 180 degrees out
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BMT Forum Logo
Ultraliner MH613 Tales and Mysteries
in Antique and Classic Mack Trucks General Discussion
Posted
How the hell does he get away with running it? I haven't seen anyone operate like that in a long time.