Iftehe about &Ma
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My thanks to Mr Norris to his letter (CM, November on international diesels.
I, for one, would be ye interested in any further information about these early and unique diesels.
In the meantime, I hayi found the following description of the Wauke Hessleman in a 1943 dies engine maintenance man' "This six-cylinder engil is used in this country int Allen super duty shovels, though it is used to a grea extent in the USA in commercial vehicles. It is interesting in view of the fact that it is a low compression engine and uses spark ignition. With type of engine the compression space is aim entirely confined to a sleeve-like extension in 0 piston crown, which retai sufficient heat from preceding explosions to vaporise the finely dividei fuel spray as it is injected Both the injector nozzle, which is fed by a fuel pun having a separate piston each cylinder, and the sparking plug are mounte the cylinder head.
"Overhead valves operated by pushrods, are used. A seven bearing crankshaft is fitted. A pet primer and tank are fitted starting from cold. Coil or magneto ignition are fitte as required."
B BALL, Tewkesbury, Glos. my years ago, when I was II learning my craft, I was ;tructed by a very iscientious and clever old ter who, although stone if, could detect and cor:t almost any fault in the t very complicated lorries the day.
One of the things he drum • d into me was never to overk the obvious simply because as so blatant.
The instruction started with .y simple things like ignition Its in the old magnetos we re blessed with at that time.
ese ranged from dampness iund the slip-ring, or a pick-up Jsh which had disegrated, to swollen fibre ntact-breaker cam-heels rising the contacts to remain en continuously.
In those days of manual starg, one very quickly learned to L such things working proper for even if you did not half kill urself swinging the handle, iition occurring at the wrong )ment could easily result in a inful belt across the wrist or earm, or even a broken bone two.
I learned then not to overlook y single item when checking
t a non-starter. A complete 3cess of elimination was, I pn recognised, the only way arrive at the result required thout hurting myself.
And, as time went on, the me system applied to all the ler problems I had to face, id handsome dividends, and e golden rule as always, lever overlook the obvious."'
/orkshop problems
As vehicles have become )re and more complicated, irkshop problems have multi ed. Once upon a time, the )st serious and difficult-to ce fault in a brake system was at of the tension on the erating rods moving the axles len the brakes were applied cause of wear and tear in her the fixed spring-eyes or a axle location rods.
Nowadays brake air-pressure items are so complex that it is nost a specialist job to trace d rectify the cause of maliction.
But, just as always, if one arts at the beginning and
)rks through the system in an ganised fashion, the true proaM will eventually come to ht Oh, I can hear the cries of irror from superficially timenscious engineers even as I -ite these words.