Cold starting and warming up the engine

TM 9-2320-211-20-3-2

(10) Cold starting and warming up the engine. The chart in Fig. 20-16

shows the engine was run at 2,300 rpm as soon as it was started. During the same

time period, the speed field shows the truck was driven at 60 mph. Reading the two

fields shows the engine was not warmed up before driving the truck. This kind of

driving can cause damage to pistons and other engine parts. Again, the driver of

the truck must be told to change this driving habit.

Figure 20-16. Poor Cold Starting Procedure

Recording of idling for several minutes on the rpm field (Fig. 20-17) shows good

engine warm up. The speed field will record a base line which shows the truck was

not driven during warm up, pointing out a good cold starting procedure.

Figure 20-17. Good Cold Starting Procedure