Manitowoc MLC150-1, Руководство по техническому обслуживанию

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Manitowoc
Published 03-21-2021, Control # 264-01
7-9
MLC150-1 SERVICE/MAINTENANCE MANUAL POWER TRAIN
7
can hold 30 L (8 gal) of coolant.
3. Take care to prevent being burned by hot coolant as
follows.
a. Wait until the coolant temperature is below 50°C
(122°F).
b. Place a heavy cloth over the fill cap (4).
c. Turn the fill cap counterclockwise until the pressure
starts to release (indicated by a hissing sound).
d. Wait for the pressure to escape completely.
e. Turn the fill cap fully counterclockwise and remove
it.
4. Open the drain valve (5).
5. Close the drain valve and remove the drain hose once
the cooling system has completely drained.
6. Dispose of the drained coolant according to local
environmental regulations.
7. Inspect the cooling system:
• Check for damaged hoses and loose or damaged
hose clamps. Replace as required.
• Check the radiator for leaks, damage, and dirt
buildup. Clean and replace as required.
Flushing
If it is necessary to flush the cooling system, refer to
Cummins’ literature/online site for detailed instructions.
Filling
1. The system has a maximum fill rate of 19 L (5 gal) per
minute. Fill the system slowly to allow air to vent.
2. While allowing air to vent, slowly add supplemental
coolant additive (SCA) and a 50-50 coolant mixture to
the radiator through the fill cap opening.
Refer to the Cummins’ literature/online site for specific
SCA and coolant recommendations.
3. Once coolant is visible in the middle of the sight gauge
(3), wait 2 to 3 minutes before starting the engine to
allow the system to naturally purge entrained air and to
allow the coolant level to stabilize.
4. Add a 50/50 coolant mixture to bring the coolant to the
middle the sight gauge (2).
5. Check that both cab heater valves on the engine are
open.
6. In the cab, place the heat control to maximum.
7. With the fill cap removed:
• Start the engine and operate it at low idle for 2-3
minutes.
• Stop the engine and add a 50/50 coolant mixture to
bring the coolant to the middle the sight gauge (3).
NOTE: After starting a cold engine, increase engine speed
slowly to provide adequate bearing lubrication and
to allow oil pressure to stabilize.
8. With the radiator fill cap removed, start the engine and
run it at high idle until the thermostat opens.
Engine damage can occur if the temperature rises
above 93°C (200°F).
9. Reduce engine speed to low idle for 2 minutes to cool
down the internal engine components, then stop the
engine.
10. Once the engine has cooled to 50°C (122°F), add a 50/
50 coolant mixture to bring the coolant to the middle the
sight gauge (3).
11. Install the fill cap (4).
12. Close and lock the access door (2).
13. Operate the engine until it is at its normal operating
temperature and check for coolant leaks. Repair as
needed.
WARNING
Chemical and Burn Hazard!
Coolant could spray from an open radiator cap while the
engine is running. Do not stand near the radiator while
operating the engine with the pressure cap removed.
REFERENCE
ONLY