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).
Issues and suggested fixes for brake shoes, hydraulic dampers, and the front bumper.
| Identifier | ExFiles\Box 83\4\ scan0229 | |
| Date | 27th May 1936 guessed | |
| ( 7 ) and the shoes become bent; also that the sockets in the shoes open up due to the violent back & fore movement. These toggles should be made thicker section, and we suggest that it should be made as a forging in order to obviate machining along its sides. The pull off springs have been found to have stretched also due to the violent action of the shoes. We are aware that by reducing the pull off poundage on the actuating countershaft in the front axle, judders can be considerably reduced, but in our opinion, this method might result in serious consequences due to seizure. We would also forcibly point out that the root cause of this complaint is the lack of servo effeciency & sensitiveness coupled with a positive and secure design of axle control, and until these two important items are satisfactory, front brake judders will always be apparent. HYDRAULIC DAMPERS. LOP FB.1339 FB.1340 The offside rear damper became ineffective after 2000 miles owing to a poor joint of the bellows unit to the damper case. The paper joint had been ruffled up, consequently the pressure of oil broke down the weak places. All the oil was lost out of the damper and a quantity from the control unit. No further trouble has arisen after making this joint good, and cleaning the damper out. At 6,600 miles, there was a tendancy for the unit pressure to be sluggish in action and not answer readily to the hand control. Apparently foreign matter had got under the release valve which cleared itself, the action of the dampers becoming normal. No further trouble occurred. The loss of oil from the dampers has since been negligible. FRONT BUMPER LOP FB.2339. Incorporating LEC 5016 Sling for Front Bumper. We have had the following trouble. The lead weights became loose, the nut having hammered into the lead. This caused a rattle in the front. The two extreme bolts holding the front bumper bar to the cross leaf springs do not remain tight. These bolts have a large head and hold the housing for the lead weight. The deflecting action ( which is considerable ) of the two cross bars are working in opposition to the front bar, which cannot reflect in the same plane. This means that the length of the front bar remains the same but with the deflection of the two cross leaf springs in the opposite plane, the length is altering as the spring leaves whip up and down. The nut of the bolt is trying, to hold the two leaf springs solid which is an impossibility, consequently, it will not remain tight and eventually, the bottom portion of the bolt breaks off under the strain. [Handwritten note in left margin, vertical] LES [Handwritten note in left margin, diagonal] F.J.H. Pares have also had trouble - See me about modification | ||