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).
Page from a service manual detailing cooling system checks and maintenance, focusing on the water pump and fan.
| Identifier | ExFiles\Box 24\5\ Scan306 | |
| Date | 1st March 1930 | |
| -2- Hs{Lord Ernest Hives - Chair}/Ru.1/M.J.1.3.30.Contd. fitted with 6 m/m.{Mr Moon / Mr Moore} 7 m/m.{Mr Moon / Mr Moore} tubes should always be suspected as potential sources of trouble. The matrix should be cleaned externally from Bees, Butterflies, etc. (D) Inspect the water pump drive and rotor for signs of damage. This often occurs due to the water pump being frozen up in hot weather. If the car has been in service a long time it may be worth while removing the cylinder block and head water covers and cleaning out the deposit of oxide that will have accumulated; at the same time, if an aluminium cylinder head is fitted the tubes should be examined for corrosion and if badly pitted, replaced by the latest nickel coated copper tubes. Having thus ascertained as far as possible that the car cooling system is in 100% condition, the following points should be born in mind. :- (1) FAN. - This is the most important item in keeping the car cool. The main trouble likely to occur is fan belt stretch. If the fan belt is slack the temperature of the cooling water is likely to rise by no less than 10°C. We now have a better fan belt which should be fitted wherever possible and in the case of high speed over-heating this new fan belt can be run with the tensioning spring choc-a-bloc i.e. a reasonable finger tension on the adjusting screw instead of the spring tension. The fan pulleys should be inspected for wear, the range of adjustment checked with the new belt and the fan blades examined for signs of damage. | ||