Graco Diaphragm Pump 1590HSPS01ASSASSPTPSEP21

• 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.

NOTE: Do not remove undamaged bearings.

Upload a photo of the product being pumped

Pressure Relief Procedure performed

Leak detector bushing unscrewed from the air side cover

Leak detector senses the presence of the product

Leak detector and bushing cleaned and re-installed

Troubleshooting notes if the leak detector fails to sense the product

Leak detector installed in the bushing

Bushing installed in the air side diaphragm cover

Leak detector wires re-attached to the monitoring device

Pressure Relief Procedure followed

Note the connection locations of the leak detector wires

Leak detector wires disconnected

Leak detector removed from the bushing in the air side diaphragm cover

Remove the other leak detector from the other air side diaphragm cover?

Leak detector installed in the bushing

NOTE: If using the ATEX leak detector, install the o-ring onto the leak detector before installation into the bushing.

NOTE: Kits are available for new check valve flappers, or check valve balls in a range of materials. Gasket kits also are available.

1. Follow the Pressure Relief Procedure, page 9 . Disconnect all hoses.

2. To drain the pump, pull the frame quick-release pins (207) and rotate the pump.

NOTE: After draining, rotate the pump to positions which will aid disassembly.

3. Remove the clamps (23) on the outlet manifold (17) and remove the manifold.

NOTE: Use care while removing manifolds to safely remove check valve components.

4. Remove remaining clamps, manifolds, gaskets and check valves.