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General The design consists basically of a four cylinder water-cooled engine built up in conjunction with an enclosed clutch and three-speed gearbox, the whole unit being mounted by four-point suspension in a sturdy frame, which is supported front and rear on long semi-elliptic springs. The back axle and torgue tube are built up as a unit, attached to the power unit by means of a ball joint situated abaft the geubox, thus totally enclosing all transmission.
Engine The 11.9 h.p. Morris-Cowley and 11·9 h.p. Morris Oxford engines have a bore of 69.5 mm. and a stroke of 102 mm, giving a cubic capacity of 1550cc. The 14/28 h.p. :Morris-Oxford engine has a bore of 75 mm. and a stroke of 102 mm. (1802 c.c.). The four cylinders are cast ell bloc, with inlet and exhausr valves arranged on the near-side. The valve tappets are adjustable, and all valve sterns and springs are enclosed by a detachable oiltight coverplate. All valves are of the same size. The cylinder head is detachable. to facilitate decarbonisation, and the three-bearing offset crankshaft has its bearings located on the cylinder block giving great rigidity and ensuring correctness of alignment. The conne&ng rods arc of stecl in the 11.9 h.p. engines and duralumin in the 14/28 h.p. engine, all crankshaft and conneCting rod bearings being of white metal in bronze shells. Aluminium piStons arc fitted. The clutch is of the four-plate type, fitted with cork insets. It requires no attention, and is automatically lubricated from the engine.
Lubrication The Morris engine is automatically lubricated by a plunger pump, submerged in the oil sump and driven from an additional earn on the camshaft. An easily detachable gauze filter surrounds the pump jntake, and an oil gauge is fitted to the dashboard to show that the pump is working. A lubrication tray ensures a conStant level of oil for the big-ends.
Gearbox The gearbox provides three speeds forward, and reverse, with a direct drive on top; the control is effected by a centrally-situated lever. The gear wheels, of nickelchrome Steel, are mounted on shon, stiff, castellated shafts, running on ball bearings, and the case containing the gears is of aluminium. Gear ratios: top, 4-75 to 1; second, 8.17 to 1 ; bottom, 1~.2. to 1; reverse, 18.5 to 1. (The II.9 h.p. Morris-Oxford models and Vans have a 5 to 1 top gear ratio and the others proportionately lower.)
Rear Brakes Both hand and foot heakes operate side-by-side shoes in pressed-Steel brake-drums (9 in. in diameter on Cowley models, 12 inch. on Oxfords) mounted on the rear hubs. These shoes are of the internal expanding type, and are lined with the highest quality friaion material; shields are provided to exclude all the dust and dirt. Wing nuts, accessible immediately at the ends of the brake-rods, are provided to enable quick brake adju~ment to be effected. The 1928 type brakes arc improved to give quiet operation.
Four Wheel Brakes On the four-wheel brake models the rear axle brakes are as above, but the pedal is interconnected to the brakes mounted on the front axle. The drums for these brakes are of the same size as those at the rear, and the aauating mechanism is so arranged that the total diStribution of braking power is 50 per cent. front and ~ 0 per cent. back. This has been found to give maximum ~opping power, and the gear has now been considerably improved over previous models. The type of front brakes used arc the Rubury patent, and they arc so made that when rounding a corner the pressure on whichever is the outside wheel is automaticaUy reduced. to ensure no ill-effcsts on the Steering.
Steel Dash The pressed-steel dash is integral with the chassis, supporting a pressed-metal in~rumcnt (facia) board. This board carries a ccntral panel in which all instruments are mounted, and it has also two recesses for small parcels.
Petrol Tank The petrol tank has seven gallons capacity, and is held in position by four bolts in tbe pressed steel dash. It is easily removable under the bonnet without diSturbing the inStrument board. The tank has large filler capl and carries a dial gauge to indicate the amount of petrol. It has also a two-level petrol tap with a reserve capacity of one gallon.
Carburetter The Morris engine is supplied with its mixture by an automatic piston-type carburctter. It has a hand adjustment for setting the slow running. and also a steering column operated mixture controlling device, which enables maximum economy in fuel consumption to be obtained. together with easy starting.
Electrical Equipment Ignition is provided by a Lucas magneto. The contact breaker and distributor of the magneto are very accessible. and any adjustment can be carried out with the greatest ease. The advance and retard of the magneto timing is effected by a lever fixed to the Steering column underneath the steering wheel. the advance position being when the lever is neareSt the driver. The lighting and starting equipment is the 12-volt Lucas type. The combined Lucas dynamo and Starter motor (dynamotor) is mounted alongside the gearbox. and coupled to the power unit by means of an inverted tooth silent chain which is totally enclosed and adequately lubricated. and has an accessible means of adjustment. Five Lucas lamps are provided (except on the rear-braked twoseater Cowley model), controlled by a switch on the dashboard. and an ammeter on the dash shows the dynamotor is charging. The whole system is perfectly silent in action, there being no engagement of pinions when the Starter switch is pressed.
Wheels and Tyres Detachable pressed steel wheels, 19 in. by 3½ in. with 28 in. by 4.95 in. Dunlop balloon tyres. are fitted as Standard on the Morris-Cowley models. the 11.9 h.p. Morris-Oxford. and the 14/28 h.p. open Morris-Oxford models. All 56 in. track and heavy closed body 14/28 h.p. Morris-Oxford chassis have wheels 20 in. by 4 in. fitted with 29 in. by 4.95 in. tyres. The detachable wheels arc secured to the hubs by means of three Studs in the case of Cowley models. five Studs on Oxford models, with nuts and spring washers.
Tools The following are provided with every car ;- Jack (with universal handle. enabling it to be operated in any position and to be withdrawn easily after use). tyre pump, wheel brace, 3 tubular box spanners and tommy, 3 double-ended spanners. cold chisel. half-round file with handle, 9 in. adjusting spanner, 6 in. Steel punch, screwdriver, magneto spanner, jet key. dynamoror adjusting spanner. lubricating pump for chassis oiling syStem. pair pliers. hammer, sparking plug box spanner, cylinder head box spanner. 3 tappet spanners. tyre lever and oileao. All the above named are housed in a subStantial weatherproof toolbox. immediately accessible.
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