What's new

SAIA | Single Axle Pups 80k?

Ted Decker trk said:
Ripdavey the overall length laws were crazy. They did weird things like make a unit that transformed from a set of twins to a truck and full trailer to traverse the northwest part of PA where I-90 crosses because OH and NY allowed twins but PA didn't. There were tractors with concave rear panels to nestle the trailer as close as possible. Old trailers angled front corners so trailer wouldn't hit Tractor when it turned . Sleeper boxes above the driver seat . It was all to conform with overall length laws. Nowadays as long as the trailer is under 53' were good, stretch em out!
Click to expand...

Consolidated Freightways had a couple of unusual operations to get doubles across Pennsylvania. On the short section of I90 between Ohio and New York, CF had one or more tractors with large concrete blocks where the fifth wheel would normally be. These were stationed at the Ohio or New York line and when a doubles unit needed to cross PA, the road unit would be broken down with the dolly still under the kite. The original tractor would continue across PA with the lead trailer and the special tractor with the concrete block would pull the kite with the dolly still underneath effectively making it a full trailer. The concrete block of course was to add weight to the tractor to make this operation safe.

Then, going across PA on I80, CF had special tractors which allowed the lead trailer to slide ahead on the tractor frame effectively making that combination a straight job so to speak, pulling a full trailer (kite plus dolly) behind. CF was innovative to say the least.
https://www.hemmings.com/blog/article/keystone-squeeze-play/
320121-970x304.jpg
 
Triplex said:
Consolidated Freightways had a couple of unusual operations to get doubles across Pennsylvania. On the short section of I90 between Ohio and New York, CF had one or more tractors with large concrete blocks where the fifth wheel would normally be. These were stationed at the Ohio or New York line and when a doubles unit needed to cross PA, the road unit would be broken down with the dolly still under the kite. The original tractor would continue across PA with the lead trailer and the special tractor with the concrete block would pull the kite with the dolly still underneath effectively making it a full trailer. The concrete block of course was to add weight to the tractor to make this operation safe.

Then, going across PA on I80, CF had special tractors which allowed the lead trailer to slide ahead on the tractor frame effectively making that combination a straight job so to speak, pulling a full trailer (kite plus dolly) behind. CF was innovative to say the least.
https://www.hemmings.com/blog/article/keystone-squeeze-play/
320121-970x304.jpg
Click to expand...
Thanks for correcting me, I had those two operations conflated. I knew the Keystone was a tripping stone to twin operations
 
From that picture it looks like the fifth wheel is all the way forward, seems to me it would drastically overload the steer. There must've been some way to block the underframe of the lead against the tractor frame rail to get weight on the drive, but it looks like clear space all along the bottom of the lead. And you're right, CF was very innovative.
 
Where'd the landing gear on the lead go? Maybe used cradles at the yards like some of the tanker outfits do today. I know some of the cryogenic outfits did away with landing gear to save weight
 
Ted Decker trk said:
Where'd the landing gear on the lead go? Maybe used cradles at the yards like some of the tanker outfits do today. I know some of the cryogenic outfits did away with landing gear to save weight
Click to expand...

There was a crank handle and a chain drive which slid the landing gear assembly further back on the trailer when the tractor slid underneath. Wish I had a camera back in the 1970's when I saw one of them up close.
 
seabreeze said:
I've never been to any of those places, are they in the U S?
I guess Hagerstown drivers territory
Click to expand...

First two in the Garden State, the last in the Empire State. If I remember correctly the road men came out of Bath, PA. But then again I'm old and I forget things. And when that happens I make up things that sound authentic. :smile new:

Here I am heading out on my morning pedal run...

qB3eTd5.jpg
 
Last edited:
dsh69 said:
Pups are rated at 40K. As long as you don't go over 20K on a single drive axle you should be good.
Click to expand...
The scale at the ohio turnpike toll plaza allows 21 on a single and if over gate will close , the lane is not long so if the 3rd on a triple was over i dont see how the gate could close because lead would be next to it
 
Triplex said:
The Jifflox name was first trademarked by the Cunha Products Company in the 1960's. I think that they were then bought out by Todco and ultimately by Kwik-Loc Company which branded them as Kwik-Loc converters strangely enough.
Click to expand...
I’ll tell ya, You 3 guys are smart as hell,(and apparently, old as dirt) appreciate the info.
 
The jiff must have all been identical since a set would be dropped hooked what if a tractor only with the jiff on was backing up and hit a block or post or something like that and tweaked the frame slightly , now wouldnt that jiff be the only one that would fit that tractor
 
ED FORCE ONE said:
The jiff must have all been identical since a set would be dropped hooked what if a tractor only with the jiff on was backing up and hit a block or post or something like that and tweaked the frame slightly , now wouldnt that jiff be the only one that would fit that tractor
Click to expand...

Don't think that could happen, if frame were out of alignment enough that the pentle hook could not latch, it would not latch with any jiff dolly.
 
RIPDavey28 said:
I’ll tell ya, You 3 guys are smart as hell,(and apparently, old as dirt) appreciate the info.
Click to expand...

Hope you understand, you're gonna be billed for all this wisdom.
Speaking of old, I'm sure you've driven a Diamond-T with 8 on the column.
 
You must log in or register to reply here.
Top