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 checking and adjusting brake pull levers, rods, and ropes.
| Identifier | ExFiles\Box 178\1\ img084 | |
| Date | 8th July 1924 | |
| - 3 - cams should not be used as stops. As a further check, if the pull rod is disconnected the cam operating lever should move upwards about .4" measured at its end - see drawing. When the brake operating levers, rods and pull-off springs are connected on the axle, they should be tested to see that they work quite freely. The pull levers when depressed as far as they will go, should return smartly against their stops when released. If they are inclined to be at all slow in their action, the cause should be investigated. The ball joints on the pull rod should be quite free as tightness here will tend to make the brakes stick. When this is correctly assembled, attach a spring balance to the pull levers - one at a time - and register the pull in the direction of the pull ropes required to take up the brake clearances. As an average the reading should be from 6 lbs. to 12 lbs. at the commencement of movement. It will probably be found that the pull required on the near side lever will be slightly more than on the off side lever. The front pull ropes should now be connected. Pull ropes to front brakes. When these are attached new, they should be of such a length that the pull levers are just on their stops. In this system the servo is returned to its zero position under the action of the pull-off springs, consequently, there should be no slack in the pull ropes. It is preferable to have the front pull ropes under slight tension and in this comtd. | ||