4,000 Hour Gardener Denver Compressor Inspection

• Visually check for leakage on the shaft seal, replace as required. See the parts lists for the kit part number and for the tool kit part number. The tool kit is required to change the oil seal. If the oil seal is a lip seal, the wear sleeve must always be replaced

• Inspect the scavenge line, replace the check valve, clean the scavenge line if necessary.

• Inspect the inlet valve, service if necessary, see parts list for repair kit part number.

• Inspect minimum pressure/check valve operation, repair if necessary. See Fig. 2 "Minimum Discharge Pressure/Check Valve".

Check pressure relief valve

• Check pressure relief valve. The pressure relief valve has no user serviceable or repairable components.

• The valve can be tested on a separate compressed-air system.

• When raising the system operating pressure to its normal level.

• Operating the pull ring.

• If the pressure relief valve doesn't close itself or is leaky, close the doors of the compressor and push the Stop Button. After the pressure in the pressure reservoir is reduced to ambient pressure, renew the pressure relief valve.

• Inspect the condensate drain, repair if necessary.

Replace Air/Oil Separator

• Operating conditions determine the frequency of service. The air/oil separator will need to be changed as indicated by the compressor controller, every 4000 hours or every year, whichever occurs first

• If the fine oil separator is monitored (optional), then a differential pressure that is too high will be shown in the control panel of the compressor controller. When the corresponding warning lights up, it is time to change the fine oil separator.

• Switch off the compressor and ensure that it is depressurized. For this purpose open the ball valve(- 1 - Fig. 19) at the after-cooler until the system has been vented. Finally, close the valve again.

• Detach the plastic oil extraction pipe (- 2 - Fig. 18).

• Detach the plastic control air line (- 3 - Fig. 18).

• Fully remove oil extraction with pressed in extraction tube (- 4 - Fig. 18).

• Loosen all hexagonal head screws from the pressure control valve.

• Loosen the two screws in the swivel direction of the pressure control valve and remove, then the valve can be swiveled inwards.

• Remove all hexagon screws (- 7 - Fig. 18) on the circumference of the pressure reservoir's cover.

• The cheese head screw for lifting the reservoir cover (- 8 - Fig. 18) must be screwed in clock wise until the cover is lifted off by some mm.

• Pivot the reservoir cover 180°.

• Remove the used fine oil separator (- 1 - Fig. 18).

• Clean all seals and if necessary remove and clean the O-ring.

• Install a new fine oil separator.

• Pivot the reservoir cover back to the starting position.

• Screw the cheese-head screw (- 8 - Fig. 18) counter-clockwise until the reservoir cover is lying loosely on the pressure reservoir flange.

• Screw in and tighten crosswise all hex. screws except for the two screws in the pivot area of the PMV.

• Pivot the PMV back to its starting position and install it with the corresponding screws.

• Then fit the missing hexagonal head screws in the reservoir cover and tighten to a tightening torque of158 lbf ft (screw strength class 8.8) or 70 lbf ft(screw strength class 5.6)

• Tighten the cheese-head screw used to raise the reservoir cover (- 8 - Fig. 18) for rotary protection(clockwise).

• Properly reinstall all lines to the pressure reservoir and the oil extractor which have been removed