Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
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ENGINE WARM–UP AND IDLING<br />
Turn the key to IGN & ACC: the WAIT TO START light will<br />
light up for bulb check.<br />
Wait until the WAIT TO START light goes off before you<br />
start the engine.<br />
When the WAIT TO START light goes off, the preheat<br />
cycle is complete and you can start the engine normally.<br />
After the engine starts and until operating conditions<br />
reach a certain point, the system will continue to operate<br />
to eliminate white-smoke exhaust.<br />
Engine Warm–Up and Idling<br />
The purpose of engine warm-up is to allow an oil film to be<br />
established between pistons, shafts, and bearings while<br />
your engine gradually reaches operating temperature.<br />
Warm–Up Procedure<br />
1. After you have started the engine, idle the engine at<br />
approximately 600 rpm while you check vital engine<br />
systems:<br />
– oil pressure<br />
– air pressure<br />
– alternator output (with the optional voltmeter)<br />
STARTING AND OPERATING THE VEHICLE<br />
2. Before placing engine under a load, continue warmup<br />
with the engine at 900 to 1000 rpm for 3 to 5 minutes.<br />
• When a cold engine is started, increase the engine<br />
speed (rpm) slowly to be sure adequate lubrication<br />
is available to the bearings and to allow the oil pressure<br />
to stabilize. In extremely cold temperatures,<br />
you may have to increase idle speed.<br />
NOTE: In colder climates where the temperatures<br />
are often below freezing, sufficient warmup<br />
for turbocharged engines is especially important.<br />
Chilled external oil lines leading to the turbocharger<br />
will slow the oil flow until the oil<br />
warms, reducing oil available for the bearings.<br />
Watch the engine oil pressure gauge for a<br />
warming trend before increasing engine idle<br />
speed (rpm).<br />
3. Continue the engine warm-up until the coolant temperature<br />
reaches at least 130°F (54°C). At this temperature,<br />
you can use partial throttle. Wait until the<br />
coolant temperature is at least 160°F (71°C) before<br />
operating at full throttle. See “Operating <strong>Manual</strong><br />
Transmissions” on page 96.<br />
– 92 – Y53-6033 <strong>Regional</strong> <strong>Haul</strong> (R05/10)