Graco Diaphragm Pump 25C654

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.;

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.

Check fasteners. Tighten or retorque as necessary. Although pump use varies, a general guideline is to retorque fasteners every two months. Torque Instructions

Always follow torque sequence when instructed to torque fasteners.

1. Left/Right Fluid Covers Torque bolts to 190-220 in-lb (22-25 N•m).

2. Inlet Manifold Torque bolts to 120-150 in-lb (14-17 N•m).

3. Outlet Manifold Torque bolts to 120-150 in-lb (14-17 N•m).;

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

Flush the pump often enough to prevent the fluid you are pumping from drying or freezing in the pump and damaging it. Use a compatible solvent.

Always flush the pump and relieve the pressure before storing it for any length of time.

The equipment stays pressurized until pressure is manually relieved. To reduce the risk of serious injury from pressurized fluid, accidental spray from the gun or splashing fluid, follow this procedure whenever you: