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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).
Summary report of hydraulic system faults for a six-month period, with remarks on causes and solutions.

Identifier  ExFiles\Box 47\3\  Scan433
Date  1st March 1932 guessed
  
-11-

HYDRAULIC KNOCKS.
20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL.
March Quarter. C.C. 11 18 6 29 64 ) 89
W.P. 5 8 3 9 25 )
Previous " C.C. 18 51 10 38 117 ) 138
W.P. 3 7 5 6 21 )
Six months. 37 84 24 82 227 227

HYDRAULIC LEAKS.
March Quarter. C.C. - - - 8 8 ) 8
W.P. - - - - - )
Previous " C.C. - - 1 8 10 ) 11
W.P. - - - 1 1 )
Six months. - - 1 17 19 19

HYDRAULICS LOOSE ON FRAME.
March Quarter. C.C. - - - 5 5 ) 5
W.P. - - - - - )
Previous " C.C. - 1 - 5 6 ) 8
W.P. - - - 2 2 )
Six months. - 1 1 11 13 13

HYDRAULICS ARMS LOOSE.
March Quarter. C.C. - - - 11 11 ) 26
W.P. - - - 15 15 )
Previous " C.C. - - - 4 4 ) 11
W.P. - - - 7 7 )
Six months. - - - 37 37 37

REMARKS.
Depot Sheets No.105 and Hd.{Mr Hayward/Mr Huddy}217 deal with the treatment of knocks on existing dampers and Hd.{Mr Hayward/Mr Huddy}225 describes modifications to replenishing ball valves and oil feed to Ph.II front intermediate levers.
Any persistent complainers that cannot be cured. [Handwritten]

Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}183 deals with this trouble.

This is mostly due to lever boss fouling gland nut and splines are now modified to prevent this occurring.
DONT BELIEVE IT [Handwritten]
  
  


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