MNL- 0345
Page 26 Section 3 Base Edition
3.1.5.6 Changing the 4th Stage Valves
See Figure 3.1-13
3.1.5.6.1 Discharge Valve Removal Procedure
1. Remove piping connected to the 4th Stage Valve Head.
2. Remove Acorn Nut (1) and unscrew Stud (3) three or four turns.
3. Remove the Socket Head Screws (9) and remove the Valve Cover (8).
4. Loosen the Discharge Valve (5) first by turning it with a 13mm wrench on the flat surfaces.
5. Put two screwdrivers into the groove of the Discharge Valve body. See Figure 3.1-14.
6. Lift out Discharge Valve together with the O-ring (4)
3.1.5.6.2 Discharge Valve Installation Procedure
1. Check condition of O-ring (4) and replace if necessary
CAUTION
Always change the intake and discharge valves of the 4th stage at the same time.
Figure 3.1-13 4th Stage Valve and Head Figure 3.1-14 4th Stage Discharge Valve Removal
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