When I change my vehicle about 3 -4 years . Have seen the result of people using air guns to rattle them on and the thread section has stretched to breaking point. No need to tighten that much
__________________
Pets are welcome but children must be leashed at all times
When I change my vehicle about 3 -4 years . Have seen the result of people using air guns to rattle them on and the thread section has stretched to breaking point. No need to tighten that much
Surely the spring washer is more than adequate to stop the nut from loosening.
I seem to recall reading somewhere about a type of hitch that will tend to loosen the ball unless the ball used is the one specified for that hitch. I think it was something to do with the height of the ball above the tongue rather than an issue with the diameter, not sure though.
-- Edited by jimricho on Friday 20th of May 2011 08:11:03 AM
I have kept a check on my towball whilst travelling as I have noticed in some instances that the 4 steel crook wdhs (2 either side) can somehow tend to loosen the towball. Dont know how, but I would always keep a check for safety reasons.
LD if the wdh is the type I'm thinking it is there's possibly some movement between the base of the wdh and the base of the towball that may tend to loosen it. I had a neighbour (sadly since passed on) who had one of these and he had a bolt that went through the base and a hole in the tongue to stop this happening. Sometimes that bolt sheared when doing a tight turn onto a site if he didn't disconnect the wdh bars first.
I'm using a Treg hitch these days without a wdh and the Treg has a couple of lugs that go over the side of the tongue to stop any twisting.
jimricho wrote:I seem to recall reading somewhere about a type of hitch that will tend to loosen the ball unless the ball used is the one specified for that hitch. I think it was something to do with the height of the ball above the tongue rather than an issue with the diameter, not sure though.
I believe you are referring to the Alko AKS3004 Stabiliser,618304. Quote from that page "It must be used with ALKO's anti rotating towball and plate that prevents the towball rotating on the towbar. (Not included)."
__________________
PeterD Nissan Navara D23 diesel auto, Spaceland pop-top Retired radio and electronics technician. NSW Central Coast.
littledick wrote:I have kept a check on my towball whilst travelling as I have noticed in some instances that the 4 steel crook wdhs (2 either side) can somehow tend to loosen the towball. Dont know how, but I would always keep a check for safety reasons.
The stress on the head by the bars tends to rotate the head.
I don't know about the current production ones but the one I purchased in 1973 had an extra hole in the head. When you stood behind the tug and looked down on the ball, the hole was in approx the 1 or 2 o'clock position. The idea was that you drilled the tongue below this hole and put a bolt through to prevent the head from turning.
I would not use them these days. There are much better products around. They are only useful for ball weights up to around 90 kg - [an engineers rating (Tom Olthoff) not a bloody salesmans rating.]
__________________
PeterD Nissan Navara D23 diesel auto, Spaceland pop-top Retired radio and electronics technician. NSW Central Coast.
