Re: Gen 3 and 4 Towbar Issues
Posted: Fri Oct 09, 2009 10:23 pm
Frans, where did it break?? I know that the Duys is prone to shearing at the mouth of the fixed tube where the removable section is inserted, but yours seem to have broken off somewere?
Evening
The bar sheared on the welded section of the tube where it is attached to the cross bar (if this makes any sense). There was no reinforcing in the form of gusset plates for lateral or vertical stress only a standard cross joint with welding on all sides. We all know (should) that welding although stronger than the metal itself compromises the immediate area around the weld thus the requirement for gusset plates. I am not an engineer and do not claim to be an expert but common sense and experience must mean something.
We made an emergency repair at Tshabong (lost a whole day) by adding a piece of angle iron on the upper end which probably would have outlived the life of the vehicle if we had kept it (the towbar). This actually provided a vertical & horizontal gusset which was previously non-existent.
Regards
Frans
PS: Everytime I walk past a PJ I examine the towbar and recall my experience - we were very fortunate as can also be said for CATS
Evening
The bar sheared on the welded section of the tube where it is attached to the cross bar (if this makes any sense). There was no reinforcing in the form of gusset plates for lateral or vertical stress only a standard cross joint with welding on all sides. We all know (should) that welding although stronger than the metal itself compromises the immediate area around the weld thus the requirement for gusset plates. I am not an engineer and do not claim to be an expert but common sense and experience must mean something.
We made an emergency repair at Tshabong (lost a whole day) by adding a piece of angle iron on the upper end which probably would have outlived the life of the vehicle if we had kept it (the towbar). This actually provided a vertical & horizontal gusset which was previously non-existent.
Regards
Frans
PS: Everytime I walk past a PJ I examine the towbar and recall my experience - we were very fortunate as can also be said for CATS