Prolonging Engine
Page 59
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Life with H.D. Oil ENGINE life could be prolonged by the use of a heavy-duty detergent oil with a sulphur inhibitor, said Mr. W. C. Wilson, general manager of Stockton-on-Tees Transport Department, during the discussion on his paper, "Vehicle Development During' the Last Decade," read to the Birmingham branch of the Institute of Road Transport Engineers, last week. The paper was summarized in The Commercial Motm. on February 20.
Mr. Wilson said that lubricants of this type had been used by his department for over three years. They could be considered partly responsible for extending the life of the Leyland 9,litre engines to over 250,000 miles before reconditioning. The target was 300,000 miles, although slip-fit liners' would be fitted and pistons renewed at 150,000 miles.
An oil of S.A.E. 20 grade had been employed for the past six months the lubricant being changed at 7,000-mile intervals. Engines of another make required reconditioning after 160,000 miles.
Although bi-metal brake drums were an American development, British manufacturers agreed that they offered advantages and would he used increasingly. These drums appeared to possess homogeneous expansion characteristics, and no trouble was experienced with differential expansion.
The speaker considered that twoleading-shoe brakes were stable in operation and probably resisted fade better than other types. Dealing with metallic tyres, Mr. Wilson mentioned a cover which required remoulding after 25.000 miles and then ran another 50,000 miles before a second remould, Reconditioning could be repeated indefinitely, he stated.