Pup trailers

ovrszd · Jan 21, 2022

Not a great picture but here's a HEMTT pulling a trailer. You aren't backing that trailer without a turntable lock. I've saw them used extensively. Lock assembly can be activated when in a turn. As the trailer straightens the lock engages. Same for releasing. Activate the release mechanism and when the tension is relieved it will unlock.

Hay Dude · Jan 21, 2022

Skeans1 said:
It has one, there’s a locking pin to center the dolly for backing up.

Gotcha. Thats what I was figuring.

Renze · Jan 22, 2022

Hay Dude said:
So you straighten your truck/trailer, get out of the cab, walk back to the trailer and throw a lever to lock the front dolly for backing, correct?

No, you just get real drivers behind the wheel.

I have never seen a front dolly lock for backing up, though i understand the challenges backing that long HEMMT and that short trailer. Its a *****, but doable if you take your time.

Here you see a driver checking his own lights:

And here an everyday routine backing manoever:

We do have different drivers licenses for rigid trucks, truck with semitrailer and truck with pup trailers. When you get eastern bloc drivers you wonder what they have payd to get their license because they obviously didnt earn it with their driving skills

I do find it amusing that you guys are so cocksure that these trailers have turntable lock for backing...

ovrszd · Jan 22, 2022

Renze said:
No, you just get real drivers behind the wheel. I have never seen a front dolly lock for backing up, though i understand the challenges backing that long HEMMT and that short trailer. Its a *****, but doable if you take your time.

Here you see a driver checking his own lights:

And here an everyday routine backing manoever:

We do have different drivers licenses for rigid trucks, truck with semitrailer and truck with pup trailers. When you get eastern bloc drivers you wonder what they have payd to get their license because they obviously didnt earn it with their driving skills

I do find it amusing that you guys are so cocksure that these trailers have turntable lock for backing...

The trailers in your videos have no need for locking turntables. If you look closely, especially in the first video, the wheelbase of the tractor is similar or maybe slightly shorter than the distance from the tractor rear axle to the turntable. The longest distance is from the turntable axle to the rear axle of the rear trailer. A small amount of movement of the tractor front axle creates a large movement of the turntable. If that driver needs a lockable turntable he needs sent home.

Skeans1 · Jan 22, 2022

Renze said:
No, you just get real drivers behind the wheel. I have never seen a front dolly lock for backing up, though i understand the challenges backing that long HEMMT and that short trailer. Its a *****, but doable if you take your time.

Here you see a driver checking his own lights:

And here an everyday routine backing manoever:

We do have different drivers licenses for rigid trucks, truck with semitrailer and truck with pup trailers. When you get eastern bloc drivers you wonder what they have payd to get their license because they obviously didnt earn it with their driving skills

I do find it amusing that you guys are so cocksure that these trailers have turntable lock for backing...

Try a mule train short logger trailer out in the wood a with a mile or two back in with the trailer down that’s why some of the dollies are lockable.

oliver1555 · Jan 22, 2022

Renze said:
Here you see a driver checking his own lights:

Hmmm...
I never thought of doing it that way. I tend to just hop out with my flashlight and hammer and do a quick walk around, checking lights, tires, etc., when I am stopped. Maybe I'm making it too easy?

Gee Ray · Jan 22, 2022

Renze said:
Here you see a driver checking his own lights:

You could not afford to do that every day. Can you imagine how much rubber that leaves on the pavement?

My brother went to a warehouse in Philly that was underground. With all the columns in the way he watched a man back his pup trailer up to the dock to be unloaded. He did this and made it look super easy.

He then pulled up and dropped the pup so that he could unload the front trailer. He tried to back up the single for some 30 minutes before he could get back to the dock.

ovrszd · Jan 22, 2022

Gee Ray said:
You could not afford to do that every day. Can you imagine how much rubber that leaves on the pavement?

My brother went to a warehouse in Philly that was underground. With all the columns in the way he watched a man back his pup trailer up to the dock to be unloaded. He did this and made it look super easy.

He then pulled up and dropped the pup so that he could unload the front trailer. He tried to back up the single for some 30 minutes before he could get back to the dock.

I once backed a 40' trailer into a jack knifed position loading dock around the corner of a building. I could not drive out because the trailer would short cut and hit the building. I tried for 30 minutes. Finally called the dispatcher and told him my situation. He said, not worries, we've had that problem there before, sit tight, I'll send a wrecker. I felt like such a failure, after feeling like such a stud because I had backed in there. Be careful what you wish for.

4570Man · Jan 22, 2022

Gee Ray said:
You could not afford to do that every day. Can you imagine how much rubber that leaves on the pavement?

.

That was a single axel truck with a tag and a single axel trailer with a tag axel and the tag axels were off the ground so there was almost no scrubbing in that maneuver.