DeWalt 66-651 instruction manual To Replace Regulator

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8.Apply sealant to the check valve threads. Reinstall the check valve (turn clockwise).

9.Replace the pressure release tube. Tighten nuts.

10.Replace the outlet tube and tighten nuts.

11.Perform the Break-in Procedure. See "Break-in Procedure" in the Operation section.

To Replace Regulator

1.Release all air pressure from air tank. See "To Drain Tank" in the Maintenance section.

2.Unplug compressor.

3.Remove the outlet pressure gauge and quick connect (if equipped) from the regulator.

4.Remove the regulator.

5.Apply pipe sealant tape to the nipple.

Outlet

Pressure

Gauge

Regulator Quick Connect

Nipple

6.Assemble the regulator and orient as shown.

NOTE: Arrow indicates flow of air. Make sure it is pointing in the direction of air flow.

Regulator

Regulator

Arrow

7.Reapply pipe sealant to outlet pressure gauge and quick connect.

8.Reassemble outlet pressure gauge and quick connect. Orient outlet pressure gauge to read correctly. Tighten quick connect with wrench.

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D26195

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Contents Oil-Free Air Compressor Important Safety Instructions Safety Guidelines DefinitionsHazard Attachments & Accessories Hazard What can Happen HOW to Prevent IT Fire, Inhalation, Damage to Vehicle Surfaces Accessories SpecificationsGlossary Duty CycleTools Required for Assembly AssemblyUnpacking Assemble WheelsLocation of the Air Compressor InstallationVoltage and Circuit Protection Extension CordsKnow Your Air Compressor Description of Operation OperationBefore Starting How to StopCustomer Responsibilities How to StartBefore Each Start-Up To Drain Tank To Check Safety ValveAir Filter Inspection and Replacement Air Compressor Pump Intake and Exhaust Valves Service and AdjustmentsTo Replace or Clean Check Valve To Replace Regulator Storage Problem Cause Correction TroubleshootingPressure reading Check wiring connection AIR Compressor Diagram Key Part Number Description Parts ListAIR Compressor Pump Diagram KEY Part Description Limited Warranty