freightliner Custom Classic MT45 2022, Maintenance Manual

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5. Remove the 1 inch hose from the three coolant
pump inlets and replace them with longer 1 inch
lines to drain into a bucket. See
Fig. 5.
6. When the coolant has completely drained, re-
move the longer 1 inch lines.
7. Install the original 1 inch lines removed from the
coolant pump inlets in the previous step and se-
cure the lines.
8. Disconnect the 5/8 inch supply and return lines
from the high-voltage battery pack. Drain any
coolant in the lines or batteries into a bucket.
See
Fig. 6.
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1. Drain Valve
Fig. 3, Radiator Drain Valve
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1
1. Petcock Valves
Fig. 4, Accessing the Petcock Valves
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1
2 2
1. Coolant Heaters Plugs
2. Coolant Pump Inlets
Fig. 5, Coolant Heater Plugs and Pump Inlets
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1
2
1. Supply Lines 2. Return Lines
Fig. 6, High-Voltage Battery Supply and Return Lines
Engine Cooling/Radiator
20
Walk-In Van Chassis Maintenance Manual, January 2022
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