DETROIT DIESEL 53
Operating Instructions 13.1
motor switch firmly. If the engine fails to start within 30 seconds, release the starting switch and allow the starting motor
to cool a few minutes before trying again. If the engine fails to start after four attempts, an inspection should be made to
determine the cause.
CAUTION: To prevent serious damage to the starter, if the engine does not start, do not press the starting switch again
while the starting motor is running.
RUNNING
Oil Pressure
Observe the oil pressure gage immediately after starting the engine. If there is no pressure indicated within 10 to 15
seconds, stop the engine and check the lubricating oil system. Refer to the Trouble Shooting Charts in Section 15.2.
Warm-Up
Run the engine at part throttle and no-load for approximately five minutes, allowing it to warm-up before applying a load.
If the unit is operating in a closed room, start the room ventilating fan or open the windows, as weather conditions permit,
so ample air is available for the engine.
Inspection
While the engine is running at operating temperature, check for coolant, fuel or lubricating oil leaks. Tighten the line
connections where necessary to stop leaks.
Normal engine coolant temperature is 160F to 185F.
Crankcase
If the engine crankcase was refilled, stop the engine after normal operating temperature has been reached, allow the oil
to drain (approximately 10 minutes) back into the crankcase and check the oil level. Add oil, if necessary, to bring it to
the proper level on the dipstick.
Use only the heavy duty lubricating oil specified-under Lubricating Oil Specifications in Section 13.3.
Cooling System
Remove the radiator or heat exchanger tank cap slowly after the engine has reached normal operating temperature and
check the engine coolant level. The coolant level should be near the top of the opening. If necessary, add clean soft
water or a high boiling point type antifreeze.
Transmission
Check and, if necessary, replenish the oil supply in the transmission.
March, 1973
SEC. 13.1 Page 3
