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).
Examination report on a high-pressure petrol pump from vehicle 26.G.VI after 21,000 miles.
| Identifier | ExFiles\Box 108\3\ scan0183 | |
| Date | 21th April 1938 | |
| 600a also 1263 To Hy.{Tom Haldenby - Plant Engineer} From Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems} a.{Mr Adams} Hn.{F. C. Honeyman - Retail orders} c. RHO. c. Da.{Bernard Day - Chassis Design} d.{John DeLooze - Company Secretary} Mx.{John H Maddocks - Chief Proving Officer} d.{John DeLooze - Company Secretary} HFS: Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}2/MR.21.4.38. EXAMINATION OF THE HIGH PRESSURE PETROL PUMP OFF 26.G.VI. MILEAGE 21,000. Fitted with Neoprene water excluders. This pump ran without complaint throughout the mileage. The Front Unit. There was evidence that water had entered the Neoprene cover but had not penetrated the pump which was quite free from any rust. The contact points were in excellent condition and there was no sign of any soot or corrosion due to lack of ventilation. The setting of the pump was still correct at 4 holes back. The roller wear was small .001 to .0005". There was slight evidence that the pole piece had been touching the mouth of the pot and there was a good deal of powdered brass and black dust present behind the diaphragm. This coincided with the diaphragm being .008" out of true with the spindle, this being in the worst position and causing a side thrust across the toggle arm. See report Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}1/MR.31.3.38. The diaphragm showed no leakage. The Rear Unit. This unit appeared to have done less work than the front unit and was in excellent condition throughout. The armature in this case being only .003 out of true with the spindle. The thrust being along the toggle arm where it would have little or no detrimental affect. There was no measureable wear on the rollers and no dust behind the diaphragm which was still petrol tight. | ||