After the engine starts it should be gradually warmed. During this warming period and at frequent intervals while the engine is operating, the engine gauges should be observed.
Warming the Engine
After the engine starts, reduce the engine speed to low idle until the oil pressure gauge indicates normal oil pressure. When the gauge indicates normal oil pressure, the engine should be allowed to run for five minutes with the accelerator at approximately half engine speed position before applying the load. During this period the engine gauges should be observed for proper readings as explained in the topic, GAUGES.
Gauges
Crankcase Lubricating Oil Pressure Gauge: Immediately after the engine has started, check the crankcase lubricating oil pressure gauge (4) to see that it is registering pressure. When the engine is running at rated engine speed the gauge should register in the NORMAL (green) range. A lower pressure reading is normal at low idling speeds. If no pressure is indicated, investigate at once.
Water Temperature Gauge: After the engine is warm the indicator on the water temperature gauge (3) should register in the NORMAL (green) range. The water temperature regulators within the diesel engine cooling system are designed to give an approximate minimum coolant temperature of 160°F. (71°C.). The maximum operating temperature will vary according to the air temperature and load factor, but should never exceed boiling temperature at the prevailing altitude.
GAUGES
1-Fuel pressure gauge. 2-Brake oil pressure gauge. 3-Water temperature gauge. 4-Crankcase lubricating oil pressure gauge. 5-Torque converter temperature gauge. 6-Ammeter.
Fuel Pressure Gauge: The indicator on the fuel pressure gauge (1) should register in the NORMAL (green) range. See the topic, CARE OF THE FUEL FILTER.
Ammeter: Check the ammeter (6) to see that the indicator is registering in the charging range (indicator on the + side of zero). If the indicator registers in the discharging range (indicator on the - side of zero) investigate at once. See the topic, ELECTRICAL SYSTEM.
Should the ammeter indicate zero charge while the engine is running, it may be that the manual reset circuit breaker, which is located in the gauge panel on the instrument console, has opened the charging circuit. When this condition exists, investigate the cause for the circuit breaker being open. See the WIRING. To reset the circuit breaker, push in the reset button.
Torque Converter Temperature Gauge: When the torque converter is operating satisfactorily, the indicator on the torque converter temperature gauge (5) should register in the NORMAL (green) range 140°F. to 250°F. (60°C. to 132°C.). It is permissible to operate the tractor with the torque converter temperature gauge registering low in the hot (red) range 250°F. (132°C.) for short periods of operation, however, the engine coolant temperature will also rise because the torque converter fluid cooler is cooled with the engine cooling system coolant. Should it be anticipated that the torque converter temperature will exceed 250°F. (132°C.) or continue to operate in the hot (red) range, the transmission should be shifted to a lower speed, if already in first speed reduce the load or if the load is very light, shift to a higher speed. In high speed without load, reduce the engine speed.
Brake Oil Pressure Gauge: The brake oil pressure gauge (2) should register at least 800 pounds pressure before driving the machine.