Graco Diaphragm Pump 15903APS01ASSASSPTPSEP21

For use with PO and EO diaphragms.

Disassemble the Overmolded Diaphragms

NOTE: Diaphragm kits are available in a range of materials and styles. See Parts section.

1. Follow the Pressure Relief Procedure, page 9 .

Warning: This procedure requires trained personnel with PPE!

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Pressure Relief Procedure performed

Leak detector bushing unscrewed from the air side cover

Leak detector senses the presence of the product

If the leak detector successfully detected the product, clean the bushing and leak detector and re-install the leak detector and bushing into the air side diaphragm cover

Leak detector and bushing cleaned and re-installed

If the leak detector fails to sense the product, troubleshoot the leak detector to see if the leak sensor has failed or the leak detector is unable to detect the product

Leak detector troubleshooting performed

This applies to FK, PS, and SP diaphragms.

NOTE: Overmolded diaphragms are covered in Overmolded Diaphragm Repair, page 16.

NOTE: Do not remove undamaged bearings.

• Torx (T20) screwdriver or 7 mm (9/32 in.) socket wrench

Air valve repair kit 255122 is available. Use all parts in the kit for best results.

1. Follow the Pressure Relief Procedure, page 9.