Merkury Innovations 312795E Manuale Utente

•

Reference numbers and letters in parentheses in 
the text refer to the callouts in the figures and the 
parts drawing.

•

Always use Genuine Graco Parts and Accessories, 
available from your Graco distributor. If you supply 
your own accessories, be sure they are adequately 
sized and pressure rated for your system.

1.

Flush the pump, if possible, page 16.

2.

Stop the pump close to the middle of the stroke.

3.

Follow Pressure Relief Procedure, page 14.

4.

Disconnect the air and fluid hoses and the ground 
wire.

5.

Remove the shield.

NOTE: If the overflow chamber (optional accessory) 
contains fluid, unscrew the bottle (103) and discard. If it 
has not been used, the bottle can remain attached to the 
cap.

NOTE: Follow these instructions to remove the entire 
pump from the wall or cart bracket. For wall-mounted 
packages, you may prefer to remove the entire pump, 
even if only the air motor requires repair.

1.

Follow all steps under Preparation, page 18.

2.

Loosen the four mounting nuts. Use two people to 
lift the entire pump up and out from the mounting 
plate. Place it on a work bench.

1.

Follow all steps under Preparation, page 18.

2.

Loosen the screws on the top cap.

3.

Hold the coupling nut (7) with a wrench. Use 
another wrench to turn the motor shaft. To avoid 
damage to the bellows top cap and the D-shaped 
seal, do not turn the coupling nut.

4.

Lower the coupling nut (7) and remove the coupling 
collars (5).

To avoid the buildup of electrostatic charge, do not 
rub the plastic bottle with a dry cloth while it is 
attached to the pump. Remove the bottle to clean, if 
needed.

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