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).
Correction sheet for the Hobson K-S Telegage system.
| Identifier | ExFiles\Box 44\4\ Scan108 | |
| Date | 1st February 1930 | |
| Feb. 1930. X4038 Correction Sheet BRITISH MADE FOR THE HOBSON K-S TELEGAGE MADE BY H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} HOBSON LIMITED 47/55, THE VALE, ACTON, LONDON, W. 3. Telegrams: "ASSEMBLAGE, LONDON." Telephone: CHISWICK 4231 (4 lines). Correction of a faulty Telegage installation is very simple. This is assuming that you will actually DO what is set down for your guidance; that you will make no substitutions, but do exactly as dictated, OR GET NO RESULTS. WARNING: Do not remove gauge from Instrument Board or start putting on new units until you have followed these instructions. FOUR INSTALLATION CHECKS MAKE THESE FIRST I—Remove tank filler cap. See that tank vent is free and open. Do not replace cap. II—Disconnect Gauge Line (Air Line) at instrument board end from Gauge Head and make Gauge read level with the bottom line on the dial. If necessary liquid can be added or removed at the top of the Brass Tube where the Air Line disconnects. To fill use a Medicine Dropper, being careful not to overfill. To remove liquid, use a wooden match to absorb some from the Brass Tube. USE ONLY HOBSON K-S TELEGAGE LIQUID, NONE OTHER WILL DO. III—Dry Air Line. (Follow exactly or get no results). 1. Use a Hand Tyre Pump. We do not mean anything but a Hand Tyre Pump. 2. Cut metal connection from tyre pump hose. (Positively). 3. Push hose securely over instrument board end of Air Line. 4. Give 50 good full strokes continuously. (At least). IV—Reconnect Air Line, being sure that connection is tight. Before you connect, verify that gauge holds its reading and therefore does not leak. If reading has dropped instrument leaks and must be changed. Try tank unit connection to be sure it is tight. Replace tankfiller cap. You are now ready to test to see if the trouble is a defective unit or a faulty installation which you have corrected by the above adjustments. TEST I—Determine whether you can bring gauge up to proper reading by supplying air to the Tank Unit. Method—The right method of supplying air is by driving the car approximately 10 to 15 miles until the red liquid no longer rises. Stopping, starting and turning corners will accellerate this as the supply of air depends on the surge of the petrol. If you can get a reading that will stay set with car standing, the Telegage is correct. If you cannot get a reading by driving, or if the reading drops and will not stay set with the car standing, locate failure by TEST No. II. TEST II—Determine whether the failure is in the Air Line or Tank Unit. 1. Disconnect the Air Line front and rear. 2. Inspect connections for dirt and flaws. 3. Hold a finger over one end and suck on the other. If the suction created will hold the tongue for one minute, the Air Line is correct. 4. If the Air Line shows a leak, change it. 5. If the Air Line and connections are sound, the defect is in the Tank Unit, which should be changed. CAUTION: Whenever repairs are made on the Telegage, the Air Line should be blown out from the instrument board end to clear it of any petrol which may have been driven into the line when it was disconnected. (See installation Check 3.) SERVICE—HOBSON K-S Telegage liquid can be secured from H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} HOBSON Ltd., at cost. It is stocked in 1/8 oz., 1 oz., 2 oz. and 6 oz., bottles. Any Telegage parts which fail from manufacturing defects will be replaced, free of charge. (THIS IS THE CORRECTION SHEET.) | ||