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" Commer Car" Unit Removal.

24th June 1909, Page 7
24th June 1909
Page 7
Page 7, 24th June 1909 — " Commer Car" Unit Removal.
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Considerable ingenuity has been exercised by the makers of the "Commer Car" industrial vehicles in order to facilitate the easy dismounting of the engine and its accessories from the 5ton type of machine. Where a fleet of similar vehicles is employed it will, in many cases of repair, be found to be convenient to replace the whole unit on which some serious fault has developed, rather than to attempt to "patch" the job in position. On many types of chassis this course is often impossible and, in some cases, of questionable utility. It must be admitted, whether or not it be advisable unhesitatingly to lift out the whole engine for a big-end refitting, or other such repair, that it is good organisation to have a spare engine or gearbox in stock, complete in every detail, which in case of serious breakdown may take the place of the damaged unit. The tendency, in some quarters, to construct the whale of the engine, gearbox, clutch and other details as one unit is a development of a wide principle of which we are not en a m 0/3red . The satisfactory application of the separateunit system of chassis construction can best be employed where it has been decided not to make each unit too compreheasive. The magneto, the pump, the radiator, the engine, the clutch, the change-speed gearbox and the differential gearbox should all he easily and separately detachable and replaceable by identical components.

The "Commer Car" constructors have not gone to extremes in this matter ; realising that the engine must, from time to time, be replaced, they have made it their business to render this as simple a job as possible. The front transverse frame member is a casting which accommodates the radiator, the fan gear and the front end of the engine. The rear end of the engine is carried on other arm castings. When it is desired to remove the engine, instead of lifting it out, by overhead tackle in the usual way, a special truck is butted against and bolted up to the front ends of the side members of the frame, and the engine is pushed forward on to this truck. This arrangement, where no overhead tackle is available, is of very considerable advantage. When the ignition leads, the clutch shaft, the lubricating pipes, the exhaust pipes and other details have been disconnected, the engine with its radiator and fan, its magneto and other ignition gear, its pump and other components may readily be pushed along the frame on to the trolley, and another such unit may be fixed in its place. During a recent test the complete engine was easily removed in 24 minutes from a chassis which had no wheels or mudguards. The absence of these components, of course, makes for accessibility, but, even under full working conditions, the removal could, without doubt, be effected in half-an-hour. In the, case of the " Commer Car " replacement to which we refer, many of the components could, if occasion required, be treated as distinct units and be separately removed.

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