Specification:

Engine
Three options were available:
a) 5.1 litre, 6-cylinder, 90 b.h.p. at 2,400 r.p.m., torque 232 lb. ft. at 1,750 r.p.m.
b) 6.17 litre, 6-cylinder, 110 b.h.p. at 2,400 r.p.m., torque 285 lb. ft. at 1,100 r.p.m.
c) 7.7 litre, 6-cylinder, 125 b.h.p. at 2,200 r.p.m., torque 335 lb. ft. at 1,100 r.p.m.

 Clutch
14" diameter, single plate, hydraulically operated.

Gearbox
Three types, dependant on engine.
5.1 litre engine: 5-speed constant mesh unit, indirect-drive and overdrive versions, with a power take-off which could transmit up to 30 hp. at 800 r.p.m. Ratios: direct drive gearbox (for tractor chassis), 1st 6.12 to 1,
2nd 3.32 to 1, 3rd 2.38 to 1, 4th 1.55 to 1, 5th 1 to 1, reverse 4.62 to 1. Overdrive gearbox (trucks and tippers),
1st 6.12 to 1, 2nd 3.37 to 1, 3rd to 1.55 to 1, 4th 1 to 1, 5th 0.76 to 1, reverse 5.72 to 1.

6.17 litre engine: 6-speed constant-mesh unit, with an overdrive top gear. All forward gears were in constant mesh with engagement by dog clutches. A power-take-off could be fitted. Ratios: 1st 6.988 to 1, 2nd 4.308 to 1, 3rd 2.655 to 1, 4th 1.605 to 1, 5th 1 to 1, 6th 0.76 to 1, reverse 6.343 to 1.

7.685 litre engine: inertia-lock synchromesh unit with 5 forward speeds and one reverse; the synchromesh acting on the 4 highest ratios; first and reverse gears being of the sliding mesh type. Provision was made for fitting a power take-off. Ratios: 1st 6.25 to 1, 2nd 4.40 to 1, 3rd 2.65 to 1, 4th 1.56 to 1, 5th 1 to 1, reverse 6.01 to 1.

Transmission
Seamless, open, tubular, ropeller shafts with needle roller bearing universal joints. The 9 ft. and 10 ft. 6 inch wheelbase models had a single shaft, the longer 13 ft. 9 inch and 15 ft. 9 inch models had  two shafts, with connections being made through a robust centre bearing. The tipper chassis incorporated a single piece drive with Hardy Spicer couplings.

Front axle
'I' section manganese molybdenum steel axle beam with integral spring pads. 2¼ inch diameter stub axle with taper roller bearings.

Rear axle
5.1 litre engine: Heavy duty Eaton two-speed axle with finger-tip operated electric shift. Axle reduction ratios: 6.14 and 8.54 (trucks), 6.5 and 9.02 (tippers).
6.17 and 7.7 litre engine: Extra large capacity Eaton two-speed axle with reduction ratios of 5.14 and 7.02 (tractor models, 6.5 and 8.87).

Steering
Cam and double roller, 19¾ inches diameter steering wheel.

Brakes
Bendix-Westinghouse air-hydraulic braking system, actuating two-leading shoe brake units, giving controlled, powerful braking. Front brakes 15¼ inches diameter x 4¼ inches wide. Rear brakes 15½ inches diameter x 6 inches wide. The hand brake operated on the rear wheels.

Suspension
Overslung, 3 inches wide, semi-elliptic springs, 52 ins long at the front, and 60 ins.long at the rear. Lever-type hydraulic shock absorbers on the front axle were available as an extra. On the 9 foot wheelbase tractor, the springs were 58 inches long.

Wheels and Tyres
10.00 x 20, 14 ply tyres all round, fitted on interchangeable 6.00 T. 10-stud wheels. A complete spare wheel and winch type carrier were provided.

Frame
Rigid assembly ensured by the use of 9 ins. x 3 ins. x ¼ in. carbon-manganese steel, channel section, with bolted-in frame members and cross members, reinforced by flitch plates. Towing facilities were included at the front and rear.

Electrical
Compensated 24 volt lighting and starting control, with 89 ampere hour batteries, consisting of four 6 volt units.

Fuel tank
Cylindrical welded steel tank of 33 gallon capacity on 9 ft. model,  40 gallon capacity on all other models. Larger capacity, or dual tanks could be fitted on long wheelbase chassis.

Cab
Built in two sections, split at the waistline with a quickly detachable top half for easy maintenance. It had a deep wrap-round windscreen, fully adjustable seats, wind-down door windows, and fully hinged quarter lights. Extras included an external double skin, heater, and passenger tinted sun visor.