Graco Air-Operated Diaphragm Pump D32666

Tightening Threaded Connections

Before each use, check all hoses for wear or damage and replace as necessary. Check to be sure all threaded connections are tight and leak-free.

When tightening the clamps (111), apply thread lubricant to the bolts and be sure to torque the nuts (113) to 50 to 60 in-lb (5.6 to 6.8 N-m). See Fig. 9.

1-Apply thread lube and torque nuts to 50 to 60 In-lb (5.6 to 6.8 N.m);

Warning: To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 11.

Flush the pump to prevent the fluid you are pumping from drying or freezing in the pump and damaging it.

Type of solvent used for flushing

Relieve the pressure before storing the pump.

Sign off on the pump flushing procedure

The air valve is designed to operate unlubricated, however if lubrication is desired, every 500 hours of operation (or monthly) remove the hose from the pump air inlet and add two drops of machine oil to the air inlet.

Do not over-lubricate the pump. Oil is exhausted through the muffler, which could contaminate your fluid supply or other equipment. Excessive lubrication can also cause the pump to malfunction.

Did you remove the hose from the pump air inlet?

Did you add two drops of machine oil to the air inlet?

Sign off on the pump lubrication