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).
Lubrication methods for front pivots, axle control, and the design of drip plugs.
| Identifier | ExFiles\Box 27\1\ Scan041 | |
| Date | 1st February 1929 guessed | |
| - 7 - Front Pivots. It may seem that we have gone to a lot of trouble to avoid the scheme of taking pressure-oil on to the steering pivots. Bijur's recommendations have something to do with this, as he is not keen on trying to take pressure oil through working joints and pressure on the pivots is not necessary if the brake camshafts are not to be lubricated. After all, what we call for is only that the front pivot parts should be assembled right, that a joint face should constitute a seal, etc. No "fancy" drip plugs are required so that service is easy. Axle Control. The method we have found to work best on this is shown in A-12556. The addition of the capillary rod in the rocking shaft is to ensure that when the drip plug discharges oil will actually appear at the inner end of the pipe on the lever. We find then that this oil gradually "waggles" along the pipe until it appears at the outer end. Without such a rod we think the oil might not appear at the outer end, but would gradually work back into the body of the shock absorber. The center bolt of the spindle on the axle has also been increased in size to act as a capillary rod. This is the only way we have found to ensure lubrication of the forward bearing, even when the drip plug was put on the forward side of the axle to favor the forward bearing. Drip Plugs. We no longer think that the banjo drip plugs are desirable. We have used some of them and they work excellently, but we feel that at least for the U.S. where the 1/8" Briggs taper thread is standard for all lubricators everywhere, it would be unwise from the maintenance standpoint to depart from it. Bijur has in the last year done some sterling work on compression couplings shown in prints B-1227, 1707, 1754, 1763, 1772, 1893, 1895 and 1904 herewith. These are his "K type" drip plug, made in duralumin. -continued- | ||