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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).
Analysis of customer complaints for 3½ and 4¼-Litre Bentleys, detailing failures and average mileage.

Identifier  ExFiles\Box 131\4\  scan0090
Date  11th March 1937
  
Sg.{Arthur F. Sidgreaves - MD} Hs.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} C. By
RHC{R. H. Coverley - Production Engineer} Mr H.{Arthur M. Hanbury - Head Complaints} Ron.
1113.

Kingsbury.
11.3.37.

CUSTOMERS' COMPLAINTS.

3½ and 4¼-Litre Bentleys.

In analysing the customers' complaints during the last two months, the following have been the most prominent:-

(1) 4¼-Litre. There have been 63 failures of Rear Axle.
3½-Litre. " " " 176 " " "

comprising:-

Rear Wheel driving dogs 35 - 4¼ average mileage 7,010.
40 - 3½ litre average mileage 23,899.

Noise 12 - 4¼ average mileage 3,739.
44 - 3½ " "

Oil Leaks Pinion Bearing 7 - 4¼ - average mileage 7,439.
47 - 3½ - " " 21,131

Oil Leaks from Axle Tube Flanges.
9 - 4¼ - average mileage 7,210
45 - 3½ -
5/16ths bolts.

(2) 349 failures of Brakes comprising:-

Front & Rear Brake Squeaks.
4¼ - 37 average mileage 9,651
3½ - 78 " " 19,059
Hand Brake 4¼ - 2 " " 31,400
3½ - 4 " " 25,500

Squeaks from Mechanism.
4¼ - 16 " " 8,371
3½ - 16 " " 27,913

Inefficient Servos.
4¼ - 11 " " 10,733
3½ - 21 " " 23,327

Seizure of shoe anchorage and actuating shafts.
4¼ - 3 " " 13,216
3½ - 22 " " 21,929
  
  


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