2

I often see a "DO NOT PUSH" sign on the back of trucks (I believe they have all been large semi-trailer dump trucks). I've even seen "YOU PUSH IT YOU OWN IT" signs on a few. This raises two questions for me:

  1. Why would someone want to push on the back of a truck?
  2. Why would the truck owner NOT want someone to push on the back of his truck?

(Just to be clear: I'm assuming that the "push"ing would be done by another truck, NOT by a person leaning on the back.)

Edit: I just saw a "DO NOT PUSH" sign on a non-semi dump truck: no hitch involved.

  • I also see signs on the back of trucks pointing at the indicators "This is not a request"... – Solar Mike Apr 25 at 21:01
6

If the dump box gets pushed on by a truck or an end loader or whatever, it can cause damage to the box, possibly not even allowing it to dump again. The rear door, while seeming stable to you and me, would be at the mercy of an end loader or bulldozer. Some might want to push the box to get the truck to move, such as if it got stuck or needed a little extra "umph" to get started after loading and in soft soil or some such. They also might want to "help" the rear door to close (latch). There may be other reasons as well.

  • Your explanation for the damage that could be done doesn't seem right to me, as I've never seen such a sign on a standard dump truck, only a semi-trailer dump truck. I've assumed that the problem is that the hitch would get damaged, but it's strange that the hitch could tolerate such large loads when pulling the dump trailer (or braking it), while not while the truck is being pushed. – Daniel Griscom Oct 30 '14 at 16:25
  • There are a plethora of references on the interwebs that support the claim. Google it. Here's one. centraltrucksales.net/blog/… – DucatiKiller Dec 12 '15 at 22:01
  • Old Q/A, but I just saw a standard dump truck with a "DO NOT PUSH" sign; no hitch involved. Thanks. – Daniel Griscom Apr 25 at 18:45
3

The bed of a dump truck is only secured by two hinges and a Hydraulic hoist. It is not designed to be pushed by a wheel loader bulldozer or other piece of equipment in the event it becomes stuck.

An aluminum bed could easily be crushed just from the extra force imposed upon the tailgate, And in the least case scenario would be severely misaligned thus enabling it to close securely and preventing a load from Leaking, and depositing into the roadway, etc. Also, a misaligned push could actually bend the frame of the truck ruining its capacity to be operated safely again.

-1

I always thought it had something to do with the way the semi trucks push each other down the highway I don't know if you've ever noticed but two trucks will be right Bumper to Bumper to each other and what it is it's basically the same concept of knowing NASCAR the draft pushing they'll get their drafts to the point where they're both able to go faster than their governed speed limit

  • 1
    i doubt trucks or any legal street vehicle utilizes bump drafting – agent provocateur Feb 6 '18 at 23:16
  • 1
    At least not North of the Mason-Dixon .... – SteveRacer Feb 7 '18 at 3:50
  • @SteveRacer Eaaast bound and doooown – MooseLucifer Feb 7 '18 at 16:28
  • Heavy Hauler . . . Smokies at mile 18. – John Canon Dec 27 '18 at 1:04

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