Heater Shut-Off Valve
In the summer months, disconnect heater from engine coolant circuit by closing shut-off valve (A) on engine block.
Open the shut-off valve in the cooler seasons.
Be sure to open shut-off valve before switching on heater.
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John Deere POWERTECH®[vv471,1] 8.1 L engine
John Deere POWERTECH®[vv471,1] 12.5 L engine
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