DeWalt 66-651 instruction manual Know Your Air Compressor Description of Operation

Page 12
Drain
Valve
Safety Valve
On/Auto/Off
Switch
Pressure Tank Pressure Gauge Outlet
SwitchPressure
Gauge
Regulator

OPERATION

Know Your Air Compressor

READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR UNIT. Compare the illustrations with your unit to familiarize yourself with the location of various controls and adjustments. Save this manual for future reference.

Description of Operation

Become familiar with these controls before operating the unit. On/Auto/Off Switch: Turn this

switch ON to provide automatic power to the pressure switch and

OFF to remove power at the end of each use.

Pressure Switch: The pressure switch automatically starts the motor when the air tank pressure drops below the factory set "cut- in" pressure. It stops the motor when the air tank pressure reaches the factory set "cut-out" pressure.

Safety Valve: If the pressure

switch does not shut off the air compressor at its "cut-out" pressure setting, the safety valve will protect against high pressure by "popping out" at its factory set pressure (slightly higher than the pressure switch "cut-out" setting). Outlet Pressure Gauge: The outlet pressure gauge indicates the air pressure available at the outlet side of the regulator. This pressure is controlled by the regulator and is always less than or equal to the tank pressure.

Tank Pressure Gauge: The tank pressure gauge indicates the reserve air pressure in the tank.

Regulator: Controls the air pressure shown on the outlet pressure gauge. Pull the knob out and turn clockwise to increase pressure and counterclockwise to decrease pressure. When the desired pressure is reached push knob in to lock in place.

Drain Valve: The drain valve is located at the base of the air tank and is used to drain condensation at the end of each use.

Cooling System (not shown): This compressor contains an advanced design cooling system. At the heart of this cooling system is an engineered fan. It is perfectly normal for this fan to blow air

through the vent holes in large amounts. You know that the cooling system is working when air

is being expelled.

Air Compressor Pump (not shown): Compresses air into the air tank. Working air is not available until the compressor has raised the air tank pressure above that required at the air outlet.

D26195

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Contents Oil-Free Air Compressor Safety Guidelines Definitions Important Safety InstructionsHazard Attachments & Accessories Hazard What can Happen HOW to Prevent IT Fire, Inhalation, Damage to Vehicle Surfaces Specifications AccessoriesGlossary Duty CycleAssembly Tools Required for AssemblyUnpacking Assemble WheelsInstallation Location of the Air CompressorExtension Cords Voltage and Circuit ProtectionOperation Know Your Air Compressor Description of OperationHow to Stop Before StartingHow to Start Before Each Start-UpCustomer Responsibilities To Check Safety Valve Air Filter Inspection and ReplacementTo Drain Tank Service and Adjustments To Replace or Clean Check ValveAir Compressor Pump Intake and Exhaust Valves To Replace Regulator Storage Troubleshooting Problem Cause CorrectionPressure reading Check wiring connection AIR Compressor Diagram Parts List Key Part Number DescriptionAIR Compressor Pump Diagram KEY Part Description Limited Warranty