MNL-0295
August 27, 2009 Page 25
4. Remove Allen screws (7) and take off valve head cover (6).
5. To lift discharge valve out of valve head put two flat head screwdrivers into grooves of the pressure
valve body. See Figure 3-9. If necessary turn valve to loosen it, using a 13 mm open end wrench on
the flat surfaces of the valve.
6. Lift out discharge valve (3) together with O-ring (4).
7. Check O-Ring for damage and wear, replace if necessary. Put O-ring into the valve head.
8. To reinstall discharge valve. Insert valve (3) and install valve head cover (6).
9. Fasten valve head cover to valve head with Allen screws and washers (8).
10. Screw in torque stud (1) and torque to 14 ft-lbs (20 Nm)
Figure 3-9 Removing the 3rd Stage Valves
Discharge Valve Intake Valve