Gradall G660 Operator's Manual page 16

5. Hold knob in specified position for at least one
minute. Preheater indicator element should glow
brightly at the end of this period.
6. Raise preheat start knob fully to start engine.
Release knob immediately when engine starts. Do
not operate starter for more than 10 secends. If
engine fails to start, allow motor to cool for at least
2 minutes between starting attempts.
CAUTION
Wait until starting motor and flywheel
have stopped before engaging starting
motor.
Normal Upper Engine Operation
Frequently observe voltmeter, water temperature, oil
pressure and air pressure gages (if so equipped) to be
sure all engine systems are functioning properly.
CAUTION
Units having Deutz engines are equipped
with a fan belt warning light and buzzer.
These warning signals are actuated auto-
matically when the fan belt breaks. If this
occurs, stop the engine immediately and
notify maintenance personnel.
Be alert for unusual noises or vibration. When an
unusual condition is noticed, stop machine in a safe
position and shut off engine. Determine cause and
correct problem before continuing.
Stopping the Engine
Operate the engine at idle speed for a few minutes
before turning it off. This provides an opportunity for
engine coolant and lubricating oil to carry excessive
heat away from critical engine areas.
Do not "gun" engine before shut down; this practice
causes raw fuel to remove oil film from cylinder walls
and dilute lubricant in the crankcase.
MODEL 4-71N DETROIT DIESEL ENGINE:
To stop the Model 4-71N Detroit Diesel engine,
allow the engine to idle for a few minutes and then
push the throttle control lever forward fully to stop
position. Turn ignition off. Remove key if leaving
equipment.
7. After engine starts observe oil pressure gage. If
gage remains on zero for more than 10 seconds
stop engine and determine cause. Correct cause of
malfunction before starting engine. Normal oil
pressure for Deutz engine is 44 to 58 psi.
NOTE: Deutz engine is air cooled.
8. Allow engine to warm up. A few minutes running
at moderate load and varying speeds will bring
engine up to its normal operating temperature.
Early recognition and correction of unusual conditions
can often prevent a major breakdown.
Avoid prolonged idling. Idling causes engine tem-
perature to drop and this permits formation of heavy
carbon deposits and dilution of lubricating oil by
incompletely burned fuel. If the engine is not being
used, turn it off.
Once engine has reached operating temperature run at
full throttle for efficient Gradall operation.
Always keep engine covers closed while
engine is running.
MODEL 4-53 DETROIT DIESEL ENGINE: To
stop the 4-53 Detroit Diesel, allow engine to idle for a
few minutes and then pull the "PULL TO STOP" han-
dle. Turn ignition switch off and push "PULL TO
STOP" handle down after engine stops. Remove key
if leaving equipment.
CATERPILLAR ENGINE: To stop Caterpillar engine,
allow engine to idle for a few minutes and then turn igni-
tion switch off. Remove key if leaving equipment.
DEUTZ ENGINE: To stop the Deutz engine, allow
engine to idle for a few minutes. Pull engine "STOP"
handle. Turn key to "OFF". Push "STOP" handle down
after engine stops. Remove key if leaving equipment.
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CAUTION