OPERATING PROCEDURES
Revised: October 20053 - 3RT700
At ambient temperatures below 32 deg. F. on all Cum-
mins Engines, the “Quick-Start” device should be used
before engaging the starter. Push the “Quick-Start”
button for three seconds, release it and engage the
starter.
The handling and storage of “Quick-Start” should
strictly conform to manufacturer’s recommendations.
At very low temperatures, when the engine is dif- ficult
to start and operator experience so indicates, follow
the starting procedure outlined below:
1. Disengage the pumps.
2. Start the engine as described above, using the
“Quick-Start” device. ALLOW THE ENGINE TO
WARM UP. This is recommended so that optimum
engine power is obtained at low speed for the pro-
tection of the hydraulic system.
3. BE ALERT FOR SIGNS OF CAVITATION. The hy-
draulic oil provides lubrication for the pumps. When
to heavy or stiff, it will not flow fast enough to meet
pump demand and a vacuum or “cavitation” will be
created. A “screaming” noise indicates inadequate
pump lubrication, and, if allowed to continue for
more than a short period, will result in serious dam-
age to the pumps.
If cavitation noise is noticed, the hydraulic oil must be
warmed by use of a reservoir immersion heater. When
the reservoir is warm to the touch, the starting proce-
dure may be continued. Refer to the lubrication chart
for the recommended oil viscosity for the winter sea-
son.
4. Stop engine.
5. Re-engage pumps.
6. Restart engine. Be alert for signs of pump cavitation
as described in (3) above. Increase engine speed
GRADUALLY, allowing sufficient time to warm the
system before commencing operation.
COLD WEATHER STARTING
If the engine oil pressure gauge does not register nor-
mal operating pressure within 30 seconds of starting,
shut down the engine, determine the cause and effect
repairs before re-starting the engine.
When the engine reaches operating temperature, op-
erations may begin. While the engine is running, check
the gauges at frequent intervals and be alert for any
abnormal engine sounds or faulty engine performance.
NOTE: Most alternators have a speed which must be
exceeded to turn them on. It is recommended that the
engine be speeded up to at least 2/3 speed after start-
up and before any extended periods of low rpm opera-
tion to maintain battery charge.
When idling for extended periods, maintain an idle
speed sufficient to prevent the battery from being dis-
charged. Keeping the battery in a fully charged state is
important both for starting the engine and for powering
the emergency steering pump.
Throttle down to half speed or slower with no load for
at least 5 minutes before stopping. This gives the en-
gine a chance to cool off gradually before it is stopped.
NOTE: This cool down period is extremely critical on
machines equipped with turbocharged engines due to
the excessive build up of heat during normal load op-
erations.
Consult the engine manufacturer’s manual for further
operating instructions.
OPERATING THE ENGINE
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