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SECTION 20—4-WAY VALVE
Part No 1110538 81 Platinum™Series
CAUTION
DO NOT remove the coil yoke from the coil. The washer between the bottom of
the yoke and the bottom of the coil MUST not be removed. Otherwise, components
may be damaged in reassembly.
8. Set aside the coil with yoke and pilot valve stem assembly with the wires still intact.
ƽ WARNING
DO NOT use sharp tools to remove O-ring from plastic manifold opening. Damage
to the plastic manifold and/or plastic manifold airflow passage may occur. Damage
to airflow may result in improper oxygen delivery and harm to the user. Refer to
Detail “A” in FIGURE 20.5.
9. Remove poppet and O-ring from manifold opening (Detail “A”).
10. Discard old poppet and O-ring.
11. Install new O-ring into the opening in the plastic manifold housing (Detail “A”).
CAUTION
DO NOT overtighten pilot valve stem when installing it into plastic manifold.
Damage to the rubber "O" ring and/or plastic manifold may occur.
12. Install new slotted poppet into the bottom of the pilot valve stem with tapered end
facing to the bottom.
13. Install pilot valve stem and new slotted poppet with coil (with yoke and locknut
intact) into manifold opening.
14. Use a flat blade screwdriver, and tighten pilot valve stem clockwise until snug. Torque
to 25 inch-lbs. ± 5 inch-lbs.
15. Install new label onto pilot valve coil yoke.
NOTE: DO NOT remove spade connectors from pilot valve coils. Simply lay coils with spade
connectors aside while performing this installation.
16. Position pilot valve coil with yoke at an approximate 60° angle to the right (as viewed
from the front of valve) to ensure spade connectors are not pulled or tensioned after
reinstallation.
17. Use the flat blade screwdriver and hold the pilot valve-stem in place.
18. Tighten locknut clockwise with the 9/16-inch wrench until snug to secure the stem and
coil with yoke. DO NOT overtighten. Torque to 20 inch-lbs ± 3 inch-lbs.
CAUTION
DO NOT overtighten locknut when installing it onto pilot valve stem. Damage to
the plastic manifold may occur.
19. Reinstall control panel. Refer to Removing Control Panel
on page 63.