Graco 222121, Series B warranty Maintenance, Diaphragm & Valve Actuator Replacement, 307886

Maintenance

Diaphragm & Valve Actuator Replacement

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 5.

1.Relieve the pressure.

2.Remove the regulator from the fluid line.

3.Remove the six cap screws (19) from the regulator housing (24). See Fig. 2.

4.Remove the diaphragms (26 and 27). Inspect the carbide pin in the valve actuator (9) for wear. Replace if necessary.

5.Install the new diaphragms, with the PTFE diaphragm (26) facing toward the regulator housing (24), as shown in Fig. 2.

6.Install the valve actuator (9) and six cap screws (19). Torque the cap screws in the order shown in Fig. 2.

18

24

16

27

26

HytrelR (off-white)

1*

Torque to

30 to 35 ft-lb

(41 to 47 N-m)

19

HytrelR requires uniform compression. Torque each bolt no more than 1/8 turn at a time in the sequence shown. Repeat pattern until uniform torque of 60–70 in-lb (6.8–7.9 N-m) is obtained. HytrelR diaphragm should never extrude more than 1/16 in. on a side.

9	Torque Sequence
PTFE	IN
(white)	6	1
	4	3
HytrelR is a registered trademark of the DuPont Company.
	2	5
		OUT
Fig. 2			7533A
		307886	7