Category: drums

Found the Cause of the Noise on Left Hand Lock on the 1929 Model A Sport Coupe

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There has been a recirculating grinding type noise coming from the Model A on hard left hand locks since we changed the brake back plates.

Simon and I set off on a road test to pinpoint the noise and Simon nailed it!

The noise was coming from the right hand rear wheel.

After removing the wheel and hub/drum assembly we found a couple of issues.

  1. The back plate and brake drum had been rubbing
  2. The brake shoes have a raised metal edge and this has been rubbing on the inside of the brake

The brake shoe issue was alleviated by grinding the metal edge off the brake shoes

Once this was achieved the drum was placed in the lathe and a small amount of material removed to ensure that the drum and back plate were no longer  in contact.

A final road test confirmed that the diagnosis was correct and the treatment had been a success!

Here’s some photos of the work carried out

Removing material from the brake drum
Removing material from the brake drum
Removing material from the brake drum
Removing metal edge from the brake shoes
Metal filings inside brake drum
Brake Drum with evidence of contact
Metal filings inside brake drum
Brake Drum with evidence of contact

 

Rear Brakes & Axle Shafts

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Took a first look at my rear hubs, brakes & axle shafts this weekend, learned a lot 🙂

Learned that the rear axle shafts had been shimmed, also learned that this is pretty common practice 🙂

Learned that the rear shoes need some attention, along with the backplates and hardware.

Happy that I was able to remove the hubs with my three legged puller, and I need a different castellated nut for the OSR (I think?? )

Got some useful info from the H.A.M.B. always 🙂

NSR Axle Shaft With Shims
NSR Axle Shaft With Shims
Offside Rear Brakes
OSR Brake Drum
OSR Brake Drum
OSR Axle Shaft With Shims
Rear Hub
Rear Hub & Keyway
NSR Brakes
NSR Brakes
NSR Brakes

57 Varities of Brakes!!

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Started looking at the brakes today and found a bit of a mix and match situation. The 1929 Model originally had manual “rod” type brakes. It was common practice to use hydraulic brakes from the later 30’s and 40’s Fords. My friends on the H.A.M.B. (Hokey Ass Message Board) have assured me that what I have will be OK if the the wheel cylinders are the same bore.

“The one front and one rear backing plates shown are ’39-’41 style brakes with the adjustable lower anchors.

The two different style hub/drum shown are interchangeable, no cause for concern.

The ’39-’41 used a different sized front wheel cylinder as compared to the ’42-’48 brakes; but all the aftermarket replacements are the larger (later) size, which is not a problem if used in pairs.”

The next task will be to inspect everything and get a modified handbrake cable ordered from the States.

RHF Wheel Bearing