freightliner Run Smart ECASCADIA PE116DC 2022, Руководство по обслуживанию

Страница: 37 / 100

20–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
Electric vehicles are equipped with a high-voltage
system. Do not attempt any type of electrical work
on the vehicle unless you have completed HV3
Daimler Safety Training. Failure to do so could
cause severe personal injury or death.
When working on the vehicle, shut down the
engine or motor, set the parking brake, and check
the tires. Before working on the vehicles, always
place jack stands under the frame rails to ensure
the vehicle cannot drop. For EV vehicles,
decommission the vehicle and verify the HV
system is shut down. Failure to follow these steps
could result in serious personal injury or death.
20–01 Surge Tank Filler Cap
Check
WARNING
Do not remove or loosen the surge tank cap until
the cooling system has completely cooled. Use
extreme care when removing the cap. A sudden
release of pressure from removing the cap prior to
the system cooling can result in a surge of
scalding coolant that could cause serious
personal injury.
1. Check the surge tank filler cap to see if it
maintains pressure to within 10% of the pressure
rating marked on the cap. If it does not, replace
the cap. Make sure that the replacement cap is
correctly rated for the cooling system of the
vehicle. See
Fig. 1 .
2. There is a valve in the filler cap that opens under
vacuum. This prevents the collapse of hoses and
other parts that are not internally supported when
the system cools. Inspect the vacuum-relief valve
to be sure it is not stuck.
3. Make sure that the filler cap seals properly on
the coolant filler neck seat, and that the O-ring is
not cracked or deteriorated. Replace the cap if
the O-ring shows deterioration or damage.
20–02 Radiator Pressure-
Flushing and Coolant
Change
1. Apply the vehicle parking brakes, then chock the
tires. Tilt the hood.
2. Place a suitable container under the elbow of the
radiator outlet pipe and the radiator. The
container should hold at least 60 quarts (59
liters) of fluid.
3. Remove the surge tank cap.
4. Remove the drain plugs from the radiator tank.
Allow the coolant to drain.
5. Disconnect the radiator upper and lower hoses,
and install the surge tank cap and the radiator
tank drain plug. Attach the flushing gun nozzle to
the radiator at the lower radiator hose opening.
Run the water until the radiator is full.
CAUTION
When flushing the radiator, do not apply more
than 15 psi (100 kPa) air pressure. Excessive
pressure can damage the radiator.
6. Gradually, apply up to 15 psi (100 kPa) air
pressure to help dislodge sediment that has built
up in the radiator core.
f200994a 0 19 22 9/ /20
1
2
1. Surge Tank Filler Cap
2. Surge Tank
Fig. 1, Surge Tank
Engine Cooling/Radiator
20
eCascadia Maintenance Manual, 10/03/2022
20/1