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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).
Parts list for an American Instrument Board and a Fuseboard, with assembly notes.

Identifier  ExFiles\Box 19\3\  Scan120
Date  23th December 1929 guessed
  
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American Instruments & Instrument Board.

A-14096 Arrg't. of Instrument Board.
(Note that this drawing does not show the
latest form of control switch mounting).
A-14153 Clock.
A-14154 Oil Pressure Gauge.
A-14155 Ammeter.
A-14156 Thermometer.
A-12083 Thermometer Union.
A-9379 Shield for Thermometer Tube.
A-14158 Gasolene Gauge - Instr. Board.
A-14128 Gasolene Gauge - Tank Unit.
A-12051 Gasolene Gauge - Air Line Assy.
A-14161 Mounting Plate for small Instruments.
A-14571 Arrg't. of Instrument Wiring.
A-14113 Arrg't. of Pilot Jet Operation.
A-14108 Pilot Jet Control Flange.
AN-14107 Pilot Jet Control Handle.
A-14107AS Pilot Jet Control Handle Forging.
A-14110 Collar.
A-14111 Spring.
A-14524 Control Switch.
A-14540 Control Switch Mounting Flange.
A-14508 Control Switch Cover.
A-14509 Stud.
A-725 Screwed Flange.
A-726 Flange Nut.
A-727 Dash Flange.
A-14183 Flex. Conduit.
Photograph of Finished Instrument Board.

All instruments mounted from back and have no screws or attachments showing.

The Thermometer union A-12083 is screwed into the cylinder head and enables the thermometer bulb to be removed without breaking water connection.

All speedometer parts are included under "speedometer drive" above.

Fuseboard.

A-14506 Fuseboard Assy.
A-10238 Fuseboard Blank.
A-10239 Fuseboard Insert.
A-5983 Fuseboard Insert.
A-2702 Fuse Clip.
A-5304 Fuse Clip Stiffener.

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