Tow bar for MERCEDES

Frequently asked questions

• Where can I find the specifications of my coupling system?

  Your coupling system specifications can be found directly, on the label bonded onto the system, or in our catalogue.

• On my coupling system, what does the value D mean?

  The value D (expressed in kN), for a coupling system, is the maximum horizontal dynamic force generated by an articulated bar rig.

• On my coupling system, what does the value Dc mean?

  The value D (expressed in kN), for a coupling system, is the maximum horizontal dynamic force generated by a rig with central axles.

• How can I compute the value D for my rig?

  D = [(gross weight of trailer x max. loaded weight of carrier) / (gross weight of trailer x max. loaded weight of carrier)] x 9.81

• How can I compute the value Dc for my rig?

  Dc = [(gross weight of trailer x max. loaded weight of carrier) / (gross weight of trailer x max. loaded weight of carrier)] x 9.81

• On my coupling system, what does the value S mean?

  The value S (expressed in kg), for a coupling system, is the max. acceptable vertical static load. When preparing a load plan, this value must never be exceeded.

• On my coupling system, what does the value V mean?

  The value V (expressed in kN), for a coupling system, is the maximum acceptable vertical dynamic force generated by a rig with a central-axle trailer.

• How can I compute the value V for my rig?

  V = [gross weight of trailer x length of trailer platform x length of trailer platform x 2.4 (for a vehicle with mechanical suspension) or 1.8 (for a vehicle with pneumatic suspension)] / [total length from the ring to the trailer axle centre x total length from the ring to the trailer axle centre]

• My tow bar is cracked or slightly damaged, can I continue to use it?

  If your tow bar is cracked or damaged, even slightly, we advise you to replace it immediately. In fact, the mechanical properties of the bar may be affected, which means that it could break.

• On my Pommier coupling system, what does the OF N° mean?

  The OF N° on a Pommier product is the manufacturing batch number. It comprises the year and week of manufacture, and the number of products manufactured.

• Where can I find spare parts for my coupling system?

  A Spare Parts catalogue is available on our Web site, in PDF format. It will enable you to find all the spare parts available for most POMMIER products.

• What is the difference between a tow bar and an under-run bar?

  The tow bar is a coupling system (regulation R55) that allows a hook to be installed on the vehicle. Whereas the under-run bar is a rear protection system (regulation R58), similar to a bumper.