Manitowoc Published 10-09-2020, Control # 259-06 7-11
MLC80A-1/MLC90A-1/MLC100A-1/MLC100-1 SERVICE/MAINTENANCE MANUAL POWER TRAIN
2. Slowly add supplemental coolant additive (SCA) and a
50-50 coolant mixture to the radiator through the fill cap
opening. Refer to the Engine Manufacturer’s Manual for
specific SCA and coolant recommendations.
3. Once coolant is visible in the middle of the sight gauge
(2), wait 2 to 3 minutes before starting the engine to
allow the system to naturally purge entrained air and 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 radiator fill cap removed:
• Start the engine and operate it a 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 (2).
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 engine components, then stop the engine.
10. Once the engine has cooled to 50°C (120°F), add a 50/
50 coolant mixture to bring the coolant to the middle the
sight gauge (2).
11. Install the radiator fill cap (1).
12. Install the access cover.
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.
Item Description
1 Fill Cap—1.03 bar (15 PSI)
2 Sight Gauge
3Drain Valve
FIGURE 7-9
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