Graco 308550ZAD important safety instructions Diaphragm Repair, Relieve the pressure

Service

Diaphragm Repair

Tools Required

DTorque wrench

D13 mm socket wrench

DAdjustable wrench

D19 mm open–end wrench

DO-ring pick

DLithium-base grease

Disassembly

NOTE: A Fluid Section Repair Kit is available. Refer to page 26 to order the correct kit for your pump. Parts included in the kit are marked with an asterisk, for example (401*). Use all the parts in the kit for the best results.

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 12.

1.Relieve the pressure.

2.Remove the manifolds and disassemble the ball check valves as explained on page 18.

3.Using 13 mm socket wrenches, remove the screws (107 and 108) holding the fluid covers

(101)to the air covers (23). Pull the fluid covers

(101)off the pump. See Fig. 12.

1You must torque the eight long screws (108) first, then the short screws (107). Torque to 190–220 in-lb (21–25 NSm).

See Torque Sequence, page 31.

2Arrow (A) must point toward air valve (B).

B

23

101

A 2

107 1

108 1

Fig. 12

04620B

308550 19