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The Morris Oxford Six has firmly established itself as a highly popular medium Powered six cylinder car, and the continued demand for this model is ample proof of its many sterling qualities. Designed on the soundest engineering experience, it fulfills the needs of the owner who requires an all purposecar possessing a good road preformance, comfort, roominess, and general up keep economy at a moderate fullfills outlay.
The 15 h.p. power unit incorporates many features of distinct merit, including air cleaner heater and furne consuming head, while the 1932 model is fitted with a four speed twin top gearbox with completely silent third, which, in conjundtion with the clutch that has been designed to work in co-operation with it, together with powerful Lockheed hydraulic brakes, results in delightfully easy control. All these contribute towards the high degree of comfortable closed car travel possessed by these models.
The low frame, in conjunction with the new radiator sqyle and the series of well balanced and elegant bodies of "Eddyfree" fronted design, make the Morris, Oxford Six range still more attractive than ever before, and firmly establish it as a leading British Six.
Maximum driving comfort is fully ensured by the deeply upholstered adjustable seats, conveniently placed controls, and finger tip operated switches for dipping headlamps, throttle and ignition.
General The design consists basically of a six, cylinder water cooled engine with totally enclosed clutch and four speed twin, top gearbox in unit congtrudtion. This power unit is mounted in an all straight frame of unique design, to which are attached, by long supple semi-elliptic springs fore and aft, axles providing a wheelbase of 9 ft. 6 in. and a track of 4 ft. 8 in.
Engine The six cylinder engine has a bore of 63.5 mm. and a stroke of 102 mm., giving a cubic capacity of 1938 c.c. (just under two litres), with a Treasury rating of 14.9 hp., and a tax of £15. The cylinders are case en bloc with the skirt o"f the crankcase, which is extended well below the crankshaft centre and Liberally reinforced with internal webs at the main bearing locations, thus producing a deep girder sqrudure of tremendous grength and rigidity. The crankshaft is of the four bearing type, with bearings of the largest possible dimensions. Every crankshaft is balanced both !ftatically and dynamically to very fine limits by the Olsen method.
The main bearings are of diecast white metal accurately machined to such fine limits as to render hand fitting unnecessary and interchangeability certain. The steel connecting rods are equipped with white metal big end bearings of the full ring type diecast in position. They are individually balanced to a very high degree of accuracy. The aluminium pistons are of the four ring type, the lower ring being of the scraper type. They, in turn, are individually balanced, and the complete assembly of rod and piston is equalised in weight to within .2 oz. (best aero engine practice). Side by side valves are fitted and operate in conjunction with an " L " type detachable head of a patented anti, detonating design, whose combustion spaces are completely machined to ensure equality of compression and redudtion of carbon deposits to the greatest possible extent.
The valves are operated by a hollow camshaft of large diameter running in three generous bearings which is driven by a Duplex roller chain from the crankshaft, which also serves to drive the dynamo and water pump. The tappet guides are mounted in two units which can be completely removed without interfering with any other component, and the tappets are spring loaded to ensure silent operation. The camshaft is spring-loaded to obviate flutter. The induction pipe and exhaust manifolds are integral and provided with adequate hot spots. An intereaing feature of the indudtion system is the combined air pre heating cover and cleaner, which also collects and consumes all fumes discharged from the crankcase breathers.
Lubrication A spur gear pump mounted in the oil surnp and driven from the camshaft supplies oil for a full forced feed oiling circuit. The oil leaving the pump passes through an efficient filter before entering into circulation. Chassis lubrication is effedled by an Enots high pressure oilgun in conjundlion with accessible nipples.
Cooling A centrifugal pump driven from the rear of the dynamo circulates the cooling water from the base of the cylinder jackets upwards. Itis passed from the cylinder head through three carefully positioned ports which ensure even temperature diaribution. The water is automatically maintained at the mosteffective temperature by calorstat operated radiator shutters, and the radiator is fan assisted.
Electrical Equipement The distributor for the coil and battery ignition is driven from the rear of the dynamo,where it is easily accessible. The dynamo is readily detachable without disturbing the timing chain. The sarter motor is of the sliding pinion type and is located on the side of the gearbox. Full five larnp equipment is provided, including dipping headlights, side lights, Top and reverse light. All switches, together with the ignition and slow running adjustment for the throttle, and horn push, are mounted in the centre of the steering wheel, thus providing finger tip control. All electrical units are supplied by Messrs. Joseph Lucas Ltd.
Carburation An S.U. carburetter of the automatic pinion type, with adequate control over mix, ture sqrength, operated from the aecring column, supplies the working mixture
Petrol Tank The petrol tank is mounted at the rear of the chassis and has a capacity of thirteen gallons. It is fitted with an efficient pebble guard, and its contents are indicated to the driver by an electrically, operated dial gauge on the instrument panel. Gravity feed to the carburetter is provided by an automatic petrol lift.
Transmission A clutch of the single plate type having cork inserts in the driven plate, automatically fed with oil from the crankcase, ensures smoothness of adtion, and requires the minimum of attention. All gears are of case-hardened nickel-chrome steel The primary and main shafts are mounted on generous ball bearings, while the sturdy one piece layshaft rotates on bearings of more than ample dimensions. Third gear is of the silent type. A balanced tubular propeller shaft tansmits the drive to the spiral bevel final drive gears in the rear axle, and is enclosedsn the torque tube, which is provided with a single universal joint of the ring type, housed within the spherical joint of the torque tube. Transmission from power unit to road wheels is thus totally enclosed.
Four Wheel Brakes Fully compensated four wheel brakes of the Lockheed hydraulic type operating within 12 in. drums ensure the maximum of braking efficiency. Their certainty and efficiency of action is maintained under all conditions, since loft motion or loss of leverage, due to wear, is entirely eliminated. The hand brake operates on the rear wheels through cable mechanism of great arength which can be adjusted from the driving seat while the car is in motion, if necessary.
Steering The steering gear is of the Bishop cam type, providing extremely light and safe operation together with a high degree of accurate controllability.
Main Frame Parallel in plan and perfectly sqraight in elevation except for a rise over the rear axle, the frame is provided with sturdy cross members which extend well beyond the deep,sedtioned side members and carry both the body and the running,boards. The top of the frame is 18 in. from the ground when loaded. Long semi-elliptic springs front and rear, controlled by hydraulic shock absorbers of the double,acquiring type, provide beautifully comfortable suspension. The springs are enclosed in leather gaiters to protedt them from wet and road dirt.
Wheels and Tyres Detachable Magna type wire wheels, fitted with Dunlop cord tyres, are standard equipment.
Tool Kit A full kit of tools is provided with every car. These are housed in an accessible toolbox, and include:- 9in. adjustable spanner, set of three box spanners, tommy bar, cylinder head nut spanner, three double ended spanners, hammer, double-lift jack, jack handle, distributor spanner, oilcan, pair of pliers, pressure chassis lubricating pump, 6 in. punch, screwdriver, sparking plug box spanner, tyre lever, set of two tappet spanners.
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