SuperFlex/SuperPro front polybushing advice please.

[TR Tim]

Hi All

 

So i'm in the middle of major suspension referb/upgrade and need advice please.

1. Top wishbone assebly, are washers required on the inside of the fulcrum pin when fitting these bushes?

2. Should I be using nylocs or castellated nuts and split pins for fixing wishbone to fulcrum pin, and in either case what torque settings should I have with these bushes?

3. Lower wishbone to trunnion assembly with the same polybushes, washers are required between polybushes and trunnion and on the outside before the castellated nut and split pin. What torque setting for this?

4. Lower wishbone inner to chassis bracket I assume no washers inside the bracket as the bush is very snug anyway and the steel tube inside must dictate how much compression is on the bush. Again what torque settings are required.

 

The torque settings in the haynes manual presumably relate to rubber bushes hence my question?

I have torqued the inner lower wishbone to chassis brackets to 45 ft/lb and they are quite stiff? Is that correct?

 

Much appreciate any advice and Happy Easter to all.

 

Tim

Edited March 27, 2016 by TR Tim

[Blue cedar]

Tim

 

Just completed this exercise and my understanding, with referencing to the Haynes manual;

1/ no washer on the inside, solely on the nut side. I used existing castellated nut and split pin. Tightening gently up until I could no longer due to the raised edge of the pin, that the bush pivots on. Then backed off enough so I could fit the split pin.

2/answered above.

3/ torque as per Haynes manual

4/no washers, and torqued as per Haynes manual, using nylon nuts.

 

Assumed the torque setting would match that for rubber bushes, which Haynes refer to.

 

Hoping my interpretation is correct.

 

Peter

[John Bracher]

Gents, just as a reminder, do the final tightening with wheels on the ground (or simulation thereof) or else it will not sit right when lowered off the stands!!

[Blue cedar]

Hi John

 

Chris Wilton advised that was not required for a '6'.

 

Cheers Peter

[peejay4A]

Personally I would, and have, ignored that advice and loaded the suspension as much as practical before torquing.

[John Bracher]

I 'pre-loaded'.

It seems to make sense, as you are then tightening/torquing at a 'mid point' in the travel/movement.

Personal preference?

[oldtuckunder]

Personally I would, and have, ignored that advice and loaded the suspension as much as practical before torquing.

+1