Air Starters - Mack Granite GU Series Operator's Handbook Manual

170 OPERATION

Air Starters

On chassis equipped with an air starter, make sure that the air pressure gauge
reads a maximum of 120 psi before shutting down and parking for the night.
This will ensure sufficient air pressure for restarting the engine.
WARNING
Make sure clutch is depressed and transmission is in neutral before engaging
the starter! Failure to do so could cause the vehicle to jerk forward
unexpectedly causing serious damage or bodily harm.
Starting MP Engines
Use the following procedure:
1. Crank the engine until it starts.
Note: Do NOT apply the throttle pedal during engine cranking.
CAUTION
DO NOT engage the starting motor too soon after an incomplete start of the engine,
or the starter may be damaged. Wait at least five seconds before attempting to
restart the engine.
If the engine does not start immediately, limit cranking periods to 30 seconds to
avoid overheating and damaging the starter.
DO NOT rev the engine at start-up. Turbocharger damage may result. Lubricants
need time to establish a film between moving parts.
2. After the engine has started, warm the engine until the coolant temperature
reaches normal operating range (77°C to 107°C; 170°F to 225°F). Once the
engine reaches this temperature, it can be operated in a normal fashion.
Note: Warm-up time can be reduced by increasing engine idle speed between 1000
and 1200 rpm by either applying the throttle pedal or by using the Electronic Hand
Throttle feature (if equipped).
Note: For bobtail or unloaded applications, the engine may be warmed up by moving
the vehicle with "light" throttle application after only one minute of idle.