Perkins Engine
Page 40
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Improvements
THERE is little doubt that some of the success achieved by the range of oil engines made by F. Perkins, Ltd., Peterborough, is due to the efforts made by this company to meet the needs of operators. We understand that the company makes a point of adopting all practicable suggestions for improvements to Perkins engines that are put forward by agents and customers all over the world.
The introduction of the Leopard II 'was itself the result of a demand for a unit with power and torque characteristics in line with the larger sixcylindered vehicle petrol engines.
Recent improvements in design that have been incorporated include the employment of lead-bronze for the thrust halves of the main and big-end bearings; the inclusion of a safety device in the oil-pressure line; the substitution
of new types of pistons and rings, with the object of lengthening cylinder life and diminishing oil consumption, and the provision of a single-bolt fixing for the oil ?filter.
In addition, the thermostat fitting is now included in the water inlet ; tulip valves, which have been found to be less prone to distortion, are standardized; the inner valve springs have been strengthened ; the sump bottom cover is now made of steel to give greater road clearance and to resist damage caused by stones flung up by the wheels; a hand-controlled idling device has been provided so that the driver can select a tick-over speed outside the vibration period, and several new types of mounting, which offset torque reaction and minimize vibration have been designed.