Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...

Engine Warmup
If the engine still won’t start after a couple of tries,
check the manual override shutdown valve and fuel
lines for possible fuel starvation or air leaks. Starting
failure may mean fuel isn’t reaching the injectors.
6. As soon as the engine starts, begin to watch the oil
pressure gauge. Check your engine manufacturer’s
manual for the right pressure for your engine. If the oil
pressure doesn’t rise within a few seconds, stop the
engine. Find out what is wrong before restarting the
engine.
Your vehicle’s multiplex instrument system may be
equipped with an engine shutdown feature. If certain
unacceptable conditions develop after start-up, this
feature will automatically shut down the engine within
30 seconds. If this occurs, refer to the multiplex
instrument system operations & service manual for
more information.
7. Slowly engage (release) the clutch after the engine
has started.
8. Wait until normal engine oil pressure registers on the
gauge before idling or accelerating the engine beyond
1000 RPM.
PART 7: STARTING & OPERATING THE VEHICLE
Cold Temperature Starting Procedure
In cold weather, fast engine starting helps relieve the loads
on the electrical system and cranking motor. Using the
special cold starting equipment will help starting. If you
follow a few simple guidelines, you will extend the service
life of your engine.
• Keep the electrical system in top condition.
• Use the best quality fuel of the recommended grade.
• Use recommended engine lubricating oil.
Engine Warmup
The purpose of engine warmup is to allow oil film to be
established between pistons and liners, shafts and bearings
while your engine gradually reaches operating temperature.
Warmup Procedure
1. After you’ve started your engine, idle it at approximately
600 RPM while you check
• oil pressure
• air pressure
• alternator output
– 74 – Y53-6015 R(08/07)