bigcrunch
Member
- Nov 4, 2013
- 96
- Boat Info
- 1987 Sundancer 268, 2x 4.3, Onan generator, AC\Heat, radar.
- Engines
- two Mercruiser 4.3 HO
On my 7 ton utility trailer ( non boat trailer there seem to be lots of knowledgeable members here so please help):
It has 2 axles 8 lug 7000lb ea w\ drums, I replaced all four brake backing assemblies new everything, same original drums\hubs. One tire on each axle I can get to lock up turning the brake controller 3.5 and up this is empty and truck pulling it on grass surface. Wiring on the trailer runs down the left side each axle has its own tee for power. Front axle left tire locks up right keeps rotating rear axle right tire locks and left keeps rotating. I re crimped all the connectors, checked the magnets with drums off and power to them all picked up the same piece of scrap metal, adjusted the shoes, all drums are round no scoring no outer lip. I jacked up the trailer all tires off the ground applied the brakes 3.5 I can almost turn the above mentioend tires the other 2 are locked, turn up the voltage I cant turn them by hand. They all spin freely with no brake applied. I also tested the voltage at the trailer side plug matches to controller. Last test I did was disconnect the plug wired a 12 volt battery right to the plug and pulled with truck same thing. Before I start guessing any suggestions????
It has 2 axles 8 lug 7000lb ea w\ drums, I replaced all four brake backing assemblies new everything, same original drums\hubs. One tire on each axle I can get to lock up turning the brake controller 3.5 and up this is empty and truck pulling it on grass surface. Wiring on the trailer runs down the left side each axle has its own tee for power. Front axle left tire locks up right keeps rotating rear axle right tire locks and left keeps rotating. I re crimped all the connectors, checked the magnets with drums off and power to them all picked up the same piece of scrap metal, adjusted the shoes, all drums are round no scoring no outer lip. I jacked up the trailer all tires off the ground applied the brakes 3.5 I can almost turn the above mentioend tires the other 2 are locked, turn up the voltage I cant turn them by hand. They all spin freely with no brake applied. I also tested the voltage at the trailer side plug matches to controller. Last test I did was disconnect the plug wired a 12 volt battery right to the plug and pulled with truck same thing. Before I start guessing any suggestions????