Rolls-Royce Archives
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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).
Instructions for the removal and fitting of rocker shafts and tappets.

Identifier  ExFiles\Box 17\6\  Scan319
Date  27th November 1934 guessed
  
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3. If it is necessary to remove the rocker shafts after the tappets have been in operation, the plungers and casings must be emptied of oil before rebuilding. Otherwise, when tightening down the rocker shafts, the cast-iron eccentrics may catch on the stops and crack.

In order to avoid a similar risk when fitting, the engine should be turned in such a position that the 6 push rods are down.
  
  


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