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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Seized brake actuating shafts and a dry brake mechanism on chassis B.117.EJ, due to mud and water ingress.

Identifier  ExFiles\Box 85\1\  scan0087
Date  29th April 1936
  
COPY.

To Bentley Motors Ltd.,
Derby
Copy..................Hd.{Mr Hayward/Mr Huddy} Rm.{William Robotham - Chief Engineer} By.{R.W. Bailey - Chief Engineer}

Levallois
Sr/VAl6/ET. 29.4.36.

Re: CHASSIS No. B.117.EJ - Mr. H.{Arthur M. Hanbury - Head Complaints} Beghin

(Total Mileage 9413 Kms.)

While dismantling the rear axle of the above car in order to fit two reinforced type axle tubes, we found that the actuating shafts of both the foot and hand brakes had seized in the bushes as fitted to the brake carrier plates.

We also found all the brake shoe mechanism, pins, etc. to be in a very dry state and stiff in action. This was caused by mud and water having found its way past the brake drums, etc..

We take it that, when actuating shafts are erected at the time of construction of a new chassis, the hollow portion of the shafts are filled with oil. Upon dismantling the shafts, we found that the oil passages were stopped up with grit etc..

Could not some form of water and mud excluder be devised for the rear brakes?

The above is by no means the first case that we have come across.

We found the gears of the rear axle to be O.K. and there was a sufficient quantity of oil in the axle box.

Sr/VA.
  
  


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