Lift, Mix and Carry
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VEHICLE MAKERS MEET THE NEEDS OF THE BUILDING AND CONSTRUCTION INDUSTRIES
yESTERDAY the third and largest yet exhibition of construction equipment was opened at the Crystal Palace, London. A record demand for space by would-be exhibitors has resulted in some 200 entrants being accommodated, representing companies from Europe, USA and the United Kingdom. Of prime interest to readers of " The Commercial Motor" are the lorry-mounted cranes, truckmixers and dump trucks on show, and for this reason this review will deal principally vvith these types. The exhibition closes next Friday.
Scammell Lorries Ltd.
TO be shown by R. Cripps and Co. Ltd. are three heavy-duty dump trucks from Scammell Lorries Ltd. The smallest of these is the Mountaineer, of 8/10-cu. yd, capacity, which has been specially designed to operate on waterlogged ground and has four-wheel drive. The axles are of Scammell design, incorporating spiral-bevel epicyclic differential-units, and so is the gearbox, which has six forward speeds. Powered by the Leyland 0.680 Power-Plus engine, giving an output of 150 b.h.p. at 2,000 r.p.m., the vehicle will negotiate a maximum gradient of 1:3-8. The steel body is of conventional design, fitted with a replaceable wear-plate, and tips to an angle of 72 deg.
Making up the rest of the Scammell exhibits on this stand are the Sherpa, with a capacity of 9/11 Cuyd.. and the Himalayan, with a capacity of 12/14 Cu. yd. The former is a 4 x 2 type, which will negotiate gradients of I:3.9; the latter is a 6 x 4, fitted with a lockable third differential, and a gradability of 1:3-7 is claimed.
A Tee-section frame is used for the chassis of both the Sherpa and Himalayan models, the dimensions of the smaller of the two vehicles being 12 in. by 5 in. and of the larger, 14 in. by 61 in.
The transmission of the Himalayan differs from the other two models in that it is of Leyland manufacture and is known as the HI-torque model, having six forward and two reverse speeds. Gears are of the helical pattern. The box , has two control levers, the second being for the crawler gear. Taken through Hardy Spicer 1800 series shafts to the leading rear axle and on to the rearmost unit through a 1700 series shaft, the power is transmitted through the spiralbevel gears of the leading axle and the bevel scars of the second axle to the hubreduction units, thence to the wheels. This gives a final overall ratio of 8-769 to 1. The load rating of the rear bogie is given as 24 tons on any surface.
Ave' ng Barford
ON show by Aveling Barford is a twoway dump truck known as the SL300. It is powered by a Leyland A11600 diesel engine producing 163 b.h.p. This vehicle has a reversible seat and controls and is provided with four speeds in each direction. The body is manufactured of T1 high-tensile, low-alloy steel and has a single skin. The capacity of the machine is 15 tons. Also shown by this company will be the SN35 dump truck, which has a capacity of 35 tons and features a Rolls-Royce 8-cylinder, 450 b.h.p. turbocharged diesel engine, with Allison Torquamatic transmission. The body is constructed of the same material and in the same manner as that on the SL300.
A considerable range of equipment is to be shown by this company in addition to dump trucks. This will include road
making and rolling machines, motor graders, tractor shovels and loaders.
Fodens Ltd.
THIS year Fodens Ltd. will be showing five vehicles, two of which are heavyduty dumpers and the remainder truckmixers. Both dumpers will be' fitted with Gardner 6LX engines and Foden doubleunderdrive gearboxes. They are the 4DX6/21, which is of 9 cu. yd. capacity, and the 6DX6/35, which is of 15 cu. yd. capacity. They will both be fitted with the latest Foden half-cab and Foden rear axles incorporating reduction hubs. Shown for the first time. the 4DX6/21 dump truck is a four-wheeler with a 9 ft. 1.25 in, wheelbase.
Mixers by three companies—Stothert and Pitt Ltd.; NCK Rapier Ltd.; and Ritcmixer Ltd.—will be shown. These are the 6G6/30, 606/20 and the IE6/24 respectively.
Foden-based mixers can also he seen on the stands of Ritemixer Ltd. and NCK Rapier Ltd.
Scottish Land Development Ltd.
Two dump trucks are to be shown by the sole UK concessionaires for AEC, Scottish Land Development Ltd. Although the models shown have been in production for about 12 months, this will he their first appearance at Crystal Palace. With a payload of 13.4 tons the 690 Dumptruk is already in operation in considerable numbers. So constructed that it can operate equally well both on and off the highways, the 690 is a six-wheeler powered by the AEC AV690 engine, which develops 200 b.h.p. The other exhibit by this company is the 1100 Dumptntk, which has a payload of 20-05 tons and is powered by the AV 1100 engine developing 300 b.h.p.
The 1100 is fitted with a full-width cab, which is well equipped and affords the driver a high standard of comfort and visibility.
Winget Ltd.
A 6-cu.-yd. trucktnixer will be shown by Winget Ltd., of Rochester. This has a separate engine which drives the mixerunit hydraulically. All functions— charging, mixing, agitating and discharging—are controlled by a single lever which can be duplicated for front and rear operation. One of the features of the hydraulic system on this unit is that it does not require large quantities of hydraulic oil.
Also shown will be the T-seven, 7-ton truck-mounted hydraulic crane, which is an improved version of the T-six 6-ton model. As on this previous model, the T-seven is fitted with a 64-ft. tubularlattice jib and a 15-ft. fly-jib, giving an overall lift of 77 ft. Greatly increased jib control is obtained by incorporating six-part derricking-reeving. The main hook-block is of the five-fall type.
Integrally built on a specially designed crane chassis, which has 15-ton axles, the T-scven has a road speed of 42 m.p.h.; for operation on site needing tine control, it can move at crawling speed. When there is no need to use the extended jib it is claimed that the crane can be on site and operating in only a few minutes after arrival.
The crane is capable of stewing a full circle in both directions and can be powered for both travel and crane operation by either a Perkins or Leyland engine. Also shown by this company will be a complete range of the Winget Muir-Hill dumpers with capacities of from 15 cwt. to 2 tons, and two tractor shovels.
NCK Rapier Ltd.
SHOWN on the stand of NCK Rapier Ltd. and mounted on a Guychassis will be a Rapier 6-cu.-yd. truck mixer. Power for the drum is derived from the truck power-unit through a hydraulic transmission, and the Mk. Ill introduces six new features.
A simplified hydraulic system with a smaller and lighter higher-performance pump, coupled with a redesigned cooling system, imposes `less wear and provides greater capacity. A stronger drum, with the blades more accurately, angled, provides faster charging and discharging and more efficient mixing, especially for dry mixes. Variable speed controls give a wider range of drum speeds and a quickloading hopper makes for easier and cleaner charging. The largest of the Rapier truckmixers. an 8-cu.-yd. unit, will be exhibited also. This will be mounted on a Foden eight-wheeler chassis, and when used as an agitator can carry 10 cu. yd. of pre-mixed concrete.
Other items shown by this company will be excavators, a fully-slewing mobile crane (not truck mounted) and numerous self-priming water pumps.
Whitlock Bros Lid.
SHOWN for the first time with an 18 ft. fly jib, the Whitlock 7T 7-,ton mobile crane will be seen on Stand D26. This unit has a remote-controlled hoisting and derricking system and a jib constructed in high-tensile steel, 78 ft, long. Using the hydraulic remote controls, it is possible to erect, single-handed, the complete jib complete with the fly-jib..
For the purpose of transportation the jib breaks down into sections of 9 ft. and can he accommodated on the chassis. The operator's cab is mounted on the superstructure and slews continuously with the giving the operator maximum visibility at all times as well as enabling him to feel" the load. It is expected that the company shortly will announce a four-wheel-drive version. The makers. are Whitlock Bros. Ltd., Great YeLdham, Essex.
Ritemixer Ltd.
FROM the Slough-based company, Ritemixer Ltd.. comes a truckmixcr of d. capacity, which will be shown equipped with a Ford 592E industrial engine, driving the drum through a Voith Diwamatic torque converter and so dispensing with separate hydraulic connections and circuits. This unit will be mounted on a Guy Invincible sii-wheeled chassis. Engine speed and drum direction are controlled by a single lever and drum speeds of approximately 15 r.p.m. are obtained in both charge and discharge directions. It is claimed that the fluid drive greatly reduces shock loads on the transmission when operating on rough sites.
The Voith Diwamatic torque converter drive is at present available on 7/71-cu.yd. and 8/9-cu.-yd. mixers, but will in due course he available on all the company's models. Also shown by Ritemixer will be an 8/9-cu.-yd. mixer employing Dynastatic hydraulic drive mounted on a Fodeo eight-wheeled chassis. The company will exhibit on Stand A104.
Guy Motors Ltd.
TO he exhibited on the stand of Guy Motors Ltd. are two Guy Warrior Light six-wheelers equipped with truckmixer equipment. These vehicles are the same as those of the same name described Lambert Engineering Co. (Glasgow) Ltd.
THREE Hydrocon lorry-mounted cranes will be shown by Lambert Engineering Co. (Glasgow) Ltd. on Stand A72, as Well as a brand new unit that, although not lorry-mounted, has a useful turn of speed on the road, making it suitable for working between closely situated sites.
The largest of the lorry-mounted versions of the HYdrocon cranes to be shown by this company is the Hebridean -15-tonner. This unit has the operator's cabin mounted on the superstructure and provision for carrying the jib-extensions on the opposite side of the machine. With the basic jib of 25 ft. luffed to 10 ft.radius, the Hebridean has a capacity of, 15 tons. The jib folds to less than 10 it overall, to comply with the .regulations permitting road travel, and when all the extensions are erected has an Overall length of 100 ft. plus a I5-ft. fly-jib capable of handling a useful load with extreme precision.
When supplied in the alternative form, with the operator's controls mounted in the driver's cab, the whole of the 100 ft. of the jib extensions, plus the fly-jib, can be transported on the vehicle. The power unit of the Hebridean is the Leyland 0.600, giving the machineuseful road performance as well as economical operation on site.
A 10-ton model known as the Hamilton will also be shown on the company's stand, as will the 6-ton Highlander Super !Mk. H. Both the Hamilton and the Highlander are available as fouror sixwheelers, the four-wheel version incorporating either twoor four-wheel drive transmission. All the six-wheel cranes are of the double-drive variety.
Powered by the Leyland 0.400 diesel engine, the Hamilton has a maximum jib length of 100 ft., plus a 16 ft. fly-jib. The whole of this assembly when broken down can be transported on the vehicle. thus makingit a completely self-contained machine requiring no additional transport.
A very popular model in past years, the Highlander 6-ton crane will incor nitrate many new features and will be known in future as the Highlander Super Mk, 11. Many improvements to the hydraulic system and a new derrick A-frame structure, together with greatly improved traction due mainly to a new ultra-low-ratio gearbox, continue to make this one of the leading cranes of its type. Now equipped with a 74-ft. jib, or an alternative of 64 ft. with a 16-ft. fly-jib giving an overall length of 80 ft., it is claimed that extreme precision can be exercised when handling loads. The machine can transport all its own jib extensions, including the fly-jib, making it also a completely self-contained unit.
Thompson Bros. (Bilston) Ltd.
SHOWN mounted on a Leyland Super Comet will be a 6/7-cu. yd. truck mixer Manufactured by Thompson Bros. (Bilston) Ltd. The drum is driven by mechanical means from a Ford diesel engine through a gearbox incorporating twin electro-magnetic clutches which select the direction of rotation. A cutaway model of this gearbox will also be on display. A second 6/7-cu. yd. mixer, hut this time mounted on a Guy Warrior chassis and with the drive transmitted hydraulically, is to be shown. This unit has all the controls, relief valves and filters mounted on a multi-ported aluminium block which eliminates isolated joints and couplings and greatly facilitates and reduces maintenance.
Having both horizontal and vertical movement in excess of 180 deg. and 30 deg. respectively, the discharge chute is controlled by a hand-operated. screw mechanism. This ensures rapid and accurate positioning on site. The discharge mechanism can also be completely swung out of the way of the drum mouth so as to permit the loading of either dumpers of skips.
Weighing approximately 3 tons 5 cat. these mixers can he supplied with water systems to customers' requirements with capacities of from .30 to 200 gal. and equipped for either top or bottom filling.
Although built from designs licensed from Stetter of Germany, the ThompsonStetter mixers arc of exclusive British manufaclire, and can he seen on Stand C6.