Graco 3A2578B Torque Instructions, Do not overtorque, Fluid Cover Screws

Torque Instructions

Torque Instructions

If fluid cover or manifold fasteners have been loosened, it is important to torque them using the following procedure to improve sealing.

NOTE: Fluid cover and manifold fasteners have a thread-locking adhesive patch applied to the threads. If this patch is excessively worn, the fasteners may loosen during operation. Replace screws with new ones or apply medium-strength (blue) Loctite or equivalent to the threads.

NOTE: Always completely torque fluid covers before torquing manifolds.

1.Start all fluid cover screws a few turns. Then, turn down each screw just until head contacts cover.

2.Turn each screw by 1/2 turn or less working in a crisscross pattern to specified torque.

3.Repeat for manifolds.

Fluid cover and manifold fasteners: 190 to 220 in-lb (21 to 25 Nm)

4.Retorque the air valve fasteners in a crisscross pattern to the specified torque.

Air valve fasteners: 45 to 55 in-lb (5 to 6 Nm)

5.Retorque the pilot valves to the specified torque.

Do not overtorque.

Pilot valves: 20 to 25 in-lb (2 to 3 Nm)

Fluid Cover Screws

Inlet and Outlet Manifold Screws

Air Valve Screws and Pilot Valves

16 3A2578B