Originally Posted by
wagoo
Rick, I doubt that Jonnie joints would be successful in that application, in that whilst they swivel ok, the bolt cannot displace off centre from one side of the bush to the other like a rubber bushing can, and that is the only way that the radius arm principal can work. Incidently, at max articulation on my ramp, neither the RRC or the hybrids RA bushings twist like in your photos. They stay square in their mountings.Are you getting binding at the chassis ends to cause this? Eurathane bushings corroding to the RAs/chassis mounts perhaps?
After having a closer look at the hybrid, which doesn't have drilled bushings, and noticing how the metal of the RA that surrounds the bushing fouls on the top of the axle mounting, I think my previous calculation of 20'' of wheel travel was a bit optimistic.Unless this area of the mounting was clearanced and maybe reinforced, my revised calculation is 16'' of wheel travel and about 15 degrees of axle displacement relative to chassis.
Bill.