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Everything posted by doubleclutchinweasel
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EDNT-675, 235hp 3B family
doubleclutchinweasel replied to Full Floater's topic in Engine and Transmission
Funny! -
B-61 gearsets.
doubleclutchinweasel replied to Licensed to kill's topic in Antique and Classic Mack Trucks General Discussion
We used to joke about the non-turbo 673s in the B-61s we had. Seems they would run about as fast downhill as they would uphill. Not very. -
EDNT-675, 235hp 3B family
doubleclutchinweasel replied to Full Floater's topic in Engine and Transmission
Maybe "B" for "brake" (Dynatard)??? Anyway, it has been a topic for discussion before. -
First Startup
doubleclutchinweasel replied to h67st's topic in Antique and Classic Mack Trucks General Discussion
I have been making commercially available, industrial V-belt pulleys (among other things!) for a living for the last 39 years! So, this one hits close to home. "Matched" belts are cut from the same belt of raw material. So, the individual belts are as close to identical as possible. Each raw belt will be slightly different. So, 2 belts of the same number cut from different raw material could be different. Matched sets are ESSENTIAL in an application like this. There are standard V-belt groove dimensions defined by the MPTA (Mechanical Power Transmission Association). I can prob -
I have posted a couple of different Quad shifting patterns on here before. That box can intimidate some people, but it really is not that complicated. Whether using the clutch or not, getting the RPM right between shifts is key. Once you learn how big the drops are between gears, you can hear it easier than you can watch the tach. DON'T RUSH IT! DON'T FORCE IT! WAIT FOR IT! I don't want to sound insulting, so please don't take this next part that way. But, remember to let the RPM FALL when upshifting and RISE when downshifting. I was trying to teach a guy about double-clutchin
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First Startup
doubleclutchinweasel replied to h67st's topic in Antique and Classic Mack Trucks General Discussion
Old belts can definitely cause "flutter". So can off-center, bent or unevenly-worn pulleys (sheaves). -
Looks like the 15-speed "Direct in 5th" Triplex. Love your truck, man.
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How to track down air leaks?
doubleclutchinweasel replied to Dmurph2016's topic in Air Systems and Brakes
"V", correct me if I am wrong, but aren't the primary and secondary needles connected to 2 different tanks? If so, that might make it easier to isolate the system with the leak. -
B-73 Restoration
doubleclutchinweasel replied to mattb73lt's topic in Antique and Classic Mack Trucks General Discussion
I completely understand! Maybe nobody else would have known it was there, but it would have driven me crazy too! -
BCR Mack
doubleclutchinweasel replied to TJ'S Truck's topic in Antique and Classic Mack Trucks General Discussion
I think they are super cool. Used to be a guy on here with one. Like the man said, "PICTURES"! We like pictures. -
How to identify Mack truck electrical system?
doubleclutchinweasel replied to Benjamin's question in Mack Truck Q & A
It amazes me the information guys like Jojo and vmac3 have stashed away in their heads. I always learn something new when I get on here. Freakin' encyclopedias! -
Ford's Big Red Gas Turbine Truck Found
doubleclutchinweasel replied to General Ike's topic in Other Truck Makes
You know, the front of that thing still reminds me of an Econoline van on steroids. -
Not sure if the later models shared any of these part numbers. Cab Breakdown.pdf
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I see one around here every now and then. Never can seem to get a picture. May have to chase it down next time I see it!
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1956 mack b42sx with a en402 gas engine
doubleclutchinweasel replied to jim1305's topic in Engine and Transmission
You said a mouthful! Double-clutching a gasser takes a little more practice than a diesel. I suspect it has to do with the rate at which the revs rise and fall. Passes by the sweet spot a little quicker. -
Anybody got a picture of an "exhaust turbocharger conveyor" system in-use? That's a new one on me.
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Just remembered something while reading all the Detroit comments... Once operated a small tug boat. Had a 6-71 Detroit in it. Was labeled as "Gray Marine". I can't remember if Gray actually built those engines based on Detroit's design, or if they started with the Jimmy and converted it to marine use. Whatever. It was definitely a 6-71 design. The guys I worked with bought me a cap with gold braids on the bill, and for a while I acquired the nickname "Cap'n". The superintendent told me they would provide a life jacket in case i fell off the boat, but would not supply a para
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My '70 had the inverted camelback springs. Fairly light spec...34K I think. It always amazes me how the guys on here can spot so many details looking at a picture! Serious knowledge housed in the members of this forum!
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Air Compressor for E-6 350
doubleclutchinweasel replied to mackone's topic in Air Systems and Brakes
I think you could safely say that! -
Fractured rod joints are awesome. Perfect fit and incredible stability.
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New here and looking for some help
doubleclutchinweasel replied to cgerman's topic in Introduction Forum
Sorry. Had to step out for a while. I was thinking it was sometime in the 80s when the 17 digit numbers came out, but wasn’t sure exactly when. On my ‘70, the title had the vin listed as R611ST5525. It had no 17 digit number. Maybe vmac can confirm this, but it looks like, on the truck in this discussion, they HAD the 17 digit number, but just listed the last 4 digits on the door plate. -
New here and looking for some help
doubleclutchinweasel replied to cgerman's topic in Introduction Forum
Looks like the right info... -
New here and looking for some help
doubleclutchinweasel replied to cgerman's topic in Introduction Forum
By the way, I don't know if the Mack museum is back to normal yet, but they are the best source for how the truck was originally built. Here is the front page off the build sheet they sent me for my old truck.