Memories for us old truckers

[BSAA65LB]

 

[cuttin edge]

That is what was known as a Rotochamber, piston type with a sliding seal not a diaphragm. The one against the blocks had Wedge chambers tucked in there.
They make a replacement for the Roto style called a Maxibrake.

Here, we call the double chamber pot a maxi pot or maxi brake. So this rotochamber, the slack adjuster doesn't work an s cam, it's a wedge? Only reason I mentioned it was the picture of the old mack Crane operator posted, if you zoom in, you can see the slack adjuster with what must be a real short s cam. To me a wedge brake has the pot turned 90 degrees facing the wheel. Anything pre 70s is kinda different for me, but I do remember my uncle's old mack

 

[cuttin edge]

Mom's brother in law had a logging operation for years. He passed a few years ago, and one of his grand sons revived these 2 old gals that he had kept.

 

[kshansen]

Here, we call the double chamber pot a maxi pot or maxi brake. So this rotochamber, the slack adjuster doesn't work an s cam, it's a wedge? Only reason I mentioned it was the picture of the old mack Crane operator posted, if you zoom in, you can see the slack adjuster with what must be a real short s cam. To me a wedge brake has the pot turned 90 degrees facing the wheel. Anything pre 70s is kinda different for me, but I do remember my uncle's old mack

Well here is a scan out of an old Motors Manual of a wedge brake, not the best picture but might give the idea.

Something similar to this was used on many off-road machines I worked on but with a hydraulic wheel cylinder in place of the air chamber. those used the air over hydraulic master to power them. When they were working right they were good brakes but when they needed maintenance they were crap!

 

[56wrench]

My old ‘62 chev M80 still has one working Rotochamber brake pot on it but I haven’t seen one on anything else in many years.

 

[kshansen]

While on this topic of obsolete brake chambers I'm trying to remember what the ones we had on an old Michigan loader, mid-1960's machine, were called and how they worked.

Seem to recall they were not spring actuated but functioned as a parking brake. Think they were worked by applying the foot brake then pushing an air valve on dash to lock them on. Believe there were some rollers in the brake chamber that locked them into position. Then to release them you had to apply the foot valve and release the dash air valve to have the rollers release the parking brake.

 

[kshansen]

Took some digging online but thanks to Minnpar's online parts books I found what I was talking about! It's probably been 40 years since I touched those brake chambers!

 

[Birken Vogt]

DD3 brakes maybe?

 

[kshansen]

DD3 brakes maybe?

Similar but using the roro chamber diaphragm in place of the pancake style diaphragm that the DD-3 uses.

 

[DMiller]

I really disliked rebuilding Rotochambers, even in a 40T press made me nervous as to that spring getting loose, had re-diaphragmed DOZENS of Maxi Chambers over the years and was almost ecstatic when arrived to SEALED FOREVER Maxis. MAXIBRAKE Chambers are just renamed Rotochambers.

 

[emmett518]

DD3 brakes maybe?

So is that spray stuff the masculine version of my girlfriend's shower gel?

 

[stinky64]

Back to the old CF equipment again, but as long as I worked there (until the end)I cannot remember a single piece of the 28,000 pieces of equipment in the fleet that I ever wrenched on that had an S-cam, everything tractors,trailers and dollies had wedge brakes,,Brilliant set-up for some place that was always warm and sunny with no salt but up here in the rust belt not such a good idea, we were constantly banging on the self adjusters with a hammer and bar/improvised adjuster to send them down the road with a driver that was actually paying attention to adjustment before he left the yard ...

 

[Truck Shop]

 

[Truck Shop]

Scania 770S--770 hp.

 

[DMiller]

And the Triple Nickel as well Nine O Nuthin were British design V8s.

 

[Truck Shop]

And the Triple Nickel as well Nine O Nuthin were British design V8s.

Have you ever looked at military 903's--400, 500, 660, 750, 800, HP. Blow the doors off any late model
anything-plus the 903 is still being built.

 

[DMiller]

I still hear the 903s in my Nightmares, rattle rattle thunder clatter Boom Boom Boom, yes they do and did run strong and Yes did work on a few Mil Chassis with Cummins in them. The Bradley is powered by a VTA 90Nothin I have not ever seen that application. STILL Noisy and leak.

Mil had to have a Rattling Leaking Mess to replace the retiring 92 series Driptroits.

 

[DMiller]

MAIN Sorry memory of one of these was changing the Air Compressor and FIGHTING the two lower nuts both off and back on in a COF4070B Corn Queen, OILY Mess everywhere.

 

[Truck Shop]

But still better than a engine that comes from the factory with a emergency shut down flap.
Because everyone built has a high potential for going wild.

 

[LowBoy]

My daily driver...1978 KW W900A. I jump in it and go anywhere, all the time. One day I'm moving a 525 Cat grapple skidder up into a logging job in northern Maine, couple days later I'm in NC. Then Illinois, then Virginia. I move all equipment within my limits for everyone from a DIY'er to a homeowner, to contractors, dealers, auctions, etc. 40+ years in the field, and still enjoying it every day.

I put this truck on the road in April of 2015, fresh off of a 4 month restoration stem to stern. Over the past several years I've upgraded a LOT of things including going from the original 3406A PCTA 375 HP motor, to a used 3406B 400++ that I totally rebuilt a couple years ago. I put a brand new 18918B 18 speed in 2 years ago, and went from 4:33's to 3:90 Eaton gears. Has KW 8 bag air ride. I've got her dialed in beautifully now.

Ran the first year with that 375 horse Cat, and no power steering and no a/c. I'm old school but not quite that old school...so I put power steering in it the second year, and swapped motors and all the driveline to make it a pleasurable experience. Also added a Vintage Air a/c system that cools/heats nicely. I big holed the cab and bunk with a Peterbilt Unibilt opening, so I have ample leg room and can recline the seats into the mattress.

Monday morning on my birthday, instead of eating cake, I'll be moving a 525 Cat skidder from NH to MA, then shoot over by Delhi, NY to get a Ford 555D TLB going to central MA, then load a new Peterbilt truck on and carry that to Hinkley, Ill. From there a JLG telehandler, and stop in Michigan to throw a military truck on along with it...and head east. Never a dull moment.

It's nice to be able to say I still enjoy what I do, after over 40 years of it. Been an interesting ride for sure.