Gardner Denver Screw Air Compressor ECHQHCD

Observe if the unit loads and unloads properly

Drain the moisture trap in the control system

Is moisture noted in the oil level gauge?

Record the pressure drop through the filter

Is the pressure drop 20 inches of water or more?

Is there higher than normal current use by the motor?

Is there a loss of compressor delivery?

Loosen the retaining band clamp

Remove the dust cup from the body of the filter

Is cleaning necessary after visual inspection of the element?

Disconnect oil return to compressor tubing at tee near discharge manifold flange on top plate.

Disconnect tubing from tee on top plate to top of discharge manifold at the tee. Loosen nut on fitting at top of manifold and completely withdraw the tubing through the fitting. Loosen nut on fitting on top plate and completely withdraw the tubing through the fitting.

Disconnect all other tubing from discharge manifold.

Disconnect discharge manifold pipe union.

Remove screws holding the top plate to the oil reservoir tower. Lift top plate and the attached second-stage separator from the oil reservoir tower.

Invert top plate and second-stage separator. DO NOT REST THE ASSEMBLY ON THE SEPARATOR. Remove cap screws and washers holding second-stage separator and lift the separator from the top plate.

Lift the first-stage separator from the oil reservoir tower.

Disconnect the unit from the power supply

Remove the relief plug and free the hole of hardened grease

Wipe the lubrication fitting clean

Add grease with a hand-operated grease gun

Leave the relief plug temporarily off

Record Air and Oil Discharge Temperature

Record Compressor Oil Inlet Temperature

Record Oil Cooler Oil Pressure Differential (Air-Cooled Radiator)

Record Oil Cooler Oil Pressure Differential (Water-Cooled Heat Exchanger)

Temperature Differential Checks

Record Oil Cooler Temperature Differential (Air-Cooled Radiator)