OPERATION 11.2.1 HOURMETER The hourmeter electrically records the actual hours of engine operation. The purpose of the hourmeter is to indicate when to perform the recommended maintenance and lubrication operations. The hourmeter will register only when the engine is running. While the engine is running, operation display (1) in red at the end of the meter will advance in l/10 hour increments. Meter (2) will advance by 1 for each hour of operation regardless of the engine speed. 11.2.2 TRANSMISSION OIL FILTER WARNING LIGHT The transmission oil filter warning light will glow amber when the oil filter element reaches the maximum allowable restriction.
11.2.3 ENGINE COOLANT TEMPERATURE GAUGE This gauge shows the temperature of the coolant circulating through the engine. After the engine has operated a sufficient length of time, the pointer must be in the GREEN (1) area of the gauge. During normal operating, the gauge readings may vary between the minimum and maximum indicated by the GREEN area of the gauge. Continuous engine operating below (2) the minimum temperature is harmful to the engine oil, low coolant temperatures will also cause exhaust smoke and increase the rate of fuel consumption.
REMARK In cold weather, it may be necessary to cover part of the radiator to maintain the minimum coolant temperature indicated at the lower end of the GREEN area. The engine temperature, under full load conditions, should remain in the GREEN area of the gauge. Continuous overheating (3) indicates the need for mechanical correction. A clogged cooling system or a low coolant level will also cause high operating temperatures. 2-6