Rear hub runout

[jimrat]

Hi

My brakes stop the van well enough, but the pedal pulses noticeably. The van will judder when braking hard or from higher speeds - it feels the same as a warped disc.

Last year I fitted new discs, pads and carriers to the front, and the year before, new drums to the rear, but there was no improvement.

I've read that this could be caused by a bent rear wheel hub, so this evening I measured the rear hub run-out with a DTI gauge. I get 0.1mm variation on the NS hub, a bit less on the O/S. Is this enough to cause pulsing at the pedal?

Also, what size are the little bolts that hold the drum onto the hub? Are they 7mm? And are they strictly necessary, given that the wheel nuts will clamp drum too. My van has never had them - I was just wondering if they might help reduce pulsing

Cheers
Jim

[NicBeeee]

Might be worth checking you rear back plates are not bent, your rear shoes only mate fully with your drums if this is so. Dont know about bent rear hubs, do you mean the stub axle or the actual bearing housing

[jimrat]

Hi

Back plates seem OK - not rubbing on the drum

I'm not really sure which part of the hub could be bent. Stub axle would take some force! I assumed it was the part that carries the five wheel nut studs? Run out was measured on the outer face / edge.

Jim

[Titus A Duxass]

The little 7mm (11 mm head) are not necessary. They just hold the drum to the hub.

[captain Byrne]

Check the shoes are wearing evenly especially laterally. Look down the length of the shoe at the edge over the curvature, & make sure it's wearing parallel. If it's wedge shaped then your backplate isn't straight.

[jimrat]

Ok thanks - will have a closer look at the back plates