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Rubbing drums

Posted: Thu 18 Mar, 2021 2:13 pm
by stevend34
Hi Gang, after replacing rear wheel bearings, brake cylinders and brake shoes I noticed a rubbing noise. Figured it was the shoes bedding in, however upon inspection it’s the drum hitting the backing plate. Happening on both sides. See photos
The only things I can think of is the wheel bearings are wrong or I’ve pushed them in to far, or the backing plates both somehow bent in the process. Can you actually push the the axle/bearings in to far? Should I just leave it and let it work itself out? Any comments? Suggestions?

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Re: Rubbing drums

Posted: Thu 18 Mar, 2021 4:30 pm
by christover1
I think I remember 2 types of wheel bearing, with and without a built in spacer.
But it has been a while since I worked on a Sierra.

Re: Rubbing drums

Posted: Thu 18 Mar, 2021 4:40 pm
by christover1
Bearing in backwards maybe, if it is actually possible to do, may let axles go in too deep.

Re: Rubbing drums

Posted: Thu 18 Mar, 2021 5:23 pm
by stevend34
yeah i know what you mean; expected: onside of the bearing has a lip on it. These bearings where the same both sides. It could explain it.

cheapo bearings in purchased: https://www.onlineautoparts.com.au/prod ... /ZPN-01832

Chucked out the old bearing so i don't have a comparison. Anyone got a bearing kicking around the could measure for me?

Re: Rubbing drums

Posted: Thu 18 Mar, 2021 5:42 pm
by christover1
Found this, in case it is relevant

Please note wide track models from 1990-on have different Bearings with wider inner ring 21mm

Re: Rubbing drums

Posted: Thu 18 Mar, 2021 7:11 pm
by christover1
My lwb 1.0 litre had the spacers.
Was no other option then
1.3 and 1.3 widetrack some had spacers, later didn't.
I think people used the spacers from older models, so that they could use the cheaper more common bearing.
Probably not an issue now days?
We as wheelers mess with diffs and stuff, so any model could have mixed parts.
No idea if it is your issue, but worth checking with a more techy person.

Re: Rubbing drums

Posted: Fri 19 Mar, 2021 12:45 pm
by luigi
Hi Steve.
The back axles on my nt ute have a spacer. Its about 3mm wide and is shaped to fit the radius at the end of the axle....if that makes sense. The spacer goes on first, then the bearing, then the retaining collar.
I have seen bearings that don't need the spacer. They have a wider inner part that that takes the place of the spacer.

Don't forget to put the brake back plate on before the bearing... :roll: . Done that before.
Regards. Wayne.

Re: Rubbing drums

Posted: Sat 20 Mar, 2021 8:52 am
by stevend34
yeah know exactly what you mean. my bearings did not come with a seperate spacer, nor did they have the colar. That will be my issue for sure.
there is a 5mm difference according to new ones ive looked up vs mine.

Re: Rubbing drums

Posted: Wed 24 Mar, 2021 10:35 pm
by jonfromhamilton
Yes I have put the bearing on before the backing ate too haha bad times.

The extra protruding but of the inner race on the bearing goes onto thr axle first so at the end it's closer to the wheel than the diff according to youtube

Re: Rubbing drums

Posted: Thu 20 May, 2021 1:11 pm
by stevend34
just to finish this one off; the solution was purchasing and installing the correct wheel bearings which included the 'shoulder' built in to the bearing. No more rubbing