BEFORE STOPPING THE ENGINE STARTING AND OPERATING THE VEHICLE
– 144 – Y53-6033
Regional Haul (R05/10)
3. Drain water from the air reservoirs.
• While the engine and air supply system are still
warm, drain moisture from the air reservoirs. Open
the reservoir drains just enough to drain the mois-
ture. Do not deplete the entire air supply. Be sure to
close the drains before leaving the vehicle.
4. Secure the vehicle, close all the windows, and lock all
doors.
Before Stopping the Engine
Do not shut off the engine immediately. A hot engine
stores a great amount of heat and it does not cool down
immediately after you shut if off. Always cool the engine
down before shutting it off. You will greatly increase its
service life.
Idle the engine at 1000 rpm for five minutes. Then low idle
for thirty seconds before shutdown. This will allow circulat-
ing coolant and lubricating oil to carry away heat from the
cylinder head, valves, pistons, cylinder liners, turbo-
charger, and bearings. This way you can prevent engine
damage that may result from uneven cooling.
Turbocharger
This cooling-down practice is especially important for a
turbocharged engine. The turbocharger on your vehicle
contains bearings and seals that are subjected to hot
exhaust gases. While the engine is operating, heat is car-
ried away by circulating oil. If you stop the engine sud-
denly after a hard run, the temperature of the
turbocharger could rise to as much as 100°F (55°C)
above the temperature reached during operation. A sud-
den rise in temperature like this could cause the bearings
to seize or the oil seals to loosen.
Refueling
Air inside the fuel tanks allows water to condense in the
tank. To prevent this condensation while the vehicle is
parked for extended periods of time, fill the tanks to 95
percent of capacity. Never fill to more than 95 percent
capacity as this provides room for expansion resulting
from temperature extremes. When refueling, add approxi-
mately the same amount to each fuel tank on vehicles
with more than one tank.
