Graco 308441ZAD important safety instructions Diaphragm Repair

Service

Diaphragm Repair

Tools Required

DTorque wrench

D13 mm socket wrench

D15 mm socket wrench (aluminum models) or

1 in. socket wrench (stainless steel models)

D19 mm open–end wrench

DO-ring pick

DLithium-base grease

Disassembly

NOTE: A Fluid Section Repair Kit is available. Refer to page 23 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 10.

1.Relieve the pressure.

2.Remove the manifolds and disassemble the ball check valves as explained on page 16.

3.Using a 13 mm socket wrench, remove the screws (106 and 112) holding the fluid covers (101) to the air covers (23). Pull the fluid covers (101) off the pump. See Fig. 11.

1

Apply medium-strength (blue) LoctiteR or equivalent to the threads. Torque to 190–220 in-lb (22–25 NSm). See Torque Sequence, page 28.

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

3Muffler not included on Model No. 253485.

B

23

101

A 2

106 1

3

112 1

	03273C
Fig. 11

308441 17