19-12. HEATER ASSEMBLY REPLACEMENT (CONT).
Valves are closed by turning clockwise.
Close two valves (15) at right front of engine.
Steps (10) through (13) are performed outside truck.
Open front access cover (16) in front of truck.
Approximately one pint (0.5 l) of coolant will drain from heater.
Position drain pan under heater assembly (12).