NEW VERSION OF PERKINS R6 A NEW version of the R6

21st September 1956, Page 88

21st September 1956

Page 88

Page 88, 21st September 1956 — NEW VERSION OF PERKINS R6 A NEW version of the R6

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engine, known as the Mark II, is introduced today by F. Perkins, Ltd. It may be seen at the Commercial Motor Show on Stand 438QR.

The automatic chain tensioner assembly has a new triple-toothed pawl and is fed with a greater oil supply. Oilpump output is greater,. a Vokes 7-in. element is now fitted and the by-pass valve relief setting is higher.

The crankshaft is balanced with weights on the webs, and the rockershaft assembly support brackets are exceptionally sturdy. These are located by grub screws and there is a steel strongback on top of each bracket to prevent screws from working loose.

The timing-case cover has a deeper recess to accommodate the modifiedtensioner. Grooves cut in the case direct an ample oil flow from the camshaft aperture. The tensioner pad is of moulded plastics, and has been made longer.

Valve springs are of an improved pattern. Exhaust valves are of KE965 material and have chromium-plated stems. Water-circulation holes in the cylinder-head gasket are larger and an: beaded,