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).
Maintenance bulletin detailing the lubrication process for the front axle.
| Identifier | ExFiles\Box 26\5\ Scan195 | |
| Date | 15th September 1928 | |
| +3603 MAINTENANCE BULLETIN NO. 330-6 Sept. 15, 1928. RE: FRONT AXLE, LUBRICATION OF In dismantling and reassembling the front axle for any reason, there are several opportunities of spoiling the action of the Chassis Lubrication Scheme as applied to the pivots, cross steering tube balls, etc. The following description of the system, together with sketch - SK-224 is therefore given below for your information. "(1). The oil for lubricating pivots etc. enters the axle near the end on the front side with a 1/8 drip plug. It flows out through a 5/16" horizontal hole in the axle forging to a vertical groove in the pivot pin. See Sketch I. SK-224. If the key E-14705 projects too much, if there is dirt in the hole in which the pivot pin fits, or if the pin is not pulled home properly in its 1 in 200 taper, the oil will leak away down the outside of the pin, and will never reach the bearing surfaces. The first thing therefore is to see that the pin fits the axle so that every time the Bijur pump works, oil will appear at the top of the groove at "A". (2) See Sketch II. The oil issuing from "A" fills the annular space "B" between the collar and the pivot pin and runs out along shallow grooves "C" in the upper face of the collar to fill the space around the bearing-rollers. The oil from the annular space also runs down the small hole "D" in the pivot pin to the inside-bore of the pin. The next point therefore which must be oil-tight is the joint "E" between the collar and the upper face of the axle-boss. Further it is necessary to observe that when the nut "F" is tightened the collar must pull down on face "E" and not on the tapered shoulder of the pivot-pin, that is, an annular space must exist at "B". The best way to test this is to pump oil into the axle through the standard 1/8 drip plug with parts in place as shown in sketch II, and observe the flow of oil from groove "C" and from the bottom of the pivot pin. | ||