DETROIT DIESEL 53
Operating Instructions 13.1
Avoid Unnecessary Engine Idling
During long engine idling periods, the engine coolant temperature will fall below the normal operating range. The
incomplete combustion of fuel in a cold engine will cause crankcase dilution, formation of lacquer or gummy deposits on
the valves, pistons and rings and rapid accumulation of sludge in the engine.
NOTE: When prolonged engine idling is necessary, maintain at least 800 rpm.
1. Release the load and decrease the engine speed. Put all shift levers in the neutral position.
2. Allow the engine to run at half speed or slower with no load for a short time, then move the stop lever to the stop
position to shut down the engine.
If the engine does not stop after using the normal stopping procedure, pull the "Emergency Stop" knob all the way out.
This control cuts off the air to the engine. Do not try to restart again until the cause for the malfunction has been found
CAUTION: The emergency shut-down system should never be used except in an emergency.
Use of the
emergency shut-down can cause oil to be sucked past the oil seals and into the blower housing.
The air shut-off 'valve, located on the blower air inlet housing, must be reset by hand and the "Emergency Stop" knob
pushed in before the engine is ready to start again.
If the unit is equipped with a fuel valve, close it. Fill the fuel tank; a full tank minimizes condensation.
Drain the cooling system if it is not protected with antifreeze and freezing temperatures are expected. Leave the drains
open. Open the raw water drains of a heat exchanger cooling system.
Check the oil level in the crankcase. Add oil, if necessary, to bring it to the proper level on the dipstick.
Check and, if necessary, replenish the oil supply in the transmission.
Clean and check the engine thoroughly to make certain it will be ready for the next run. Refer to Lubrication and
Preventive Maintenance and perform all of the daily maintenance operations. Also perform the operations required for
the number of hours or miles the engine has been in operation.
Make the necessary adjustments and minor repairs to correct difficulties which became apparent to the operator during
the last run.