Condec UPC5110 - Manual (Page 20)

Maintenance and Service 17
7. Remove the valve stem seats (8) and valve needle seats (9) using the needle-nose pliers.
8. Remove the inner and outer O-rings (28, 27) and back-up rings (31, 30) from the valve stem seats and
wash all parts in solvent (de-natured alcohol).
9. To remove valve seats (7) from either the COARSE (pressure), VENT , or ISOLATION valves, try blowing
compressed air through the inlet and outlet fittings. Otherwise, the center holes will have to be drilled
and a tap used to extract the seat (Steps 10-13).
10. Using the electric hand drill with a No. 43 bit, carefully drill out the seat hole, ensuring that the drill does
not touch the hole in the manifold housing directly beneath the seat.
11. Blow out any chips from the seat area using compressed air.
12. While holding the 4-40 tap steady and perpendicular to the seat, slowly turn until the tap starts to engage
the seat.
13. When the tap has engaged into the seat, use a small hammer and gently knock upward against the tap
handle to extract the seat.
14. After the seat has been removed, blow any remaining chips from the seat area.
4.2.5 ORION-2D Manifold - Vernier Control Disassembly
Tools required: A/R solvent (de-natured alcohol)
1-1/4" open end wrench
screwdriver (flat-blade)
socket wrench
isolation valve needle housing socket (PN 68509)
NOTE: See Table 4-6 on page 33 and Figure 4-1 on page 34 for additional parts information.
1. With the manifold housing mounted in a vise, turn the vernier shaft (14) clockwise until the piston is
bottomed.
2. Loosen and remove the end cap (13) using a 1-1/4" wrench. At certain points during removal the end cap
will appear to lock up. If this occurs, rotate the shaft (14) clockwise until the end cap is free to turn.
3. Remove the O-ring (29) from the end cap.
4. Remove the self-sealing screw (36) that acts as the piston key.
5. Extract the piston (15) by partially screwing in the threaded end of the shaft (14) and pulling.
6. Remove the O-ring (32) from the piston groove.
7. To disassemble the end cap/shaft assembly, mount the end cap (13) in the vise.
8. Loosen and remove the locknut (20) using the isolation valve housing socket (PN 68509) and socket
wrench.
9. Loosen and remove the end bushing (12) using the same socket. Remove the shaft (14). Remove the
mylar bearing washers (41 or 42) from both sides of the shaft flange.
10. Use a small pick or screwdriver to remove the O-ring (27) from the inner groove of the end cap (13).
11. Wash all parts in solvent and blow dry with compressed air.
4.2.6 ORION-2D Manifold - Vernier Control Reassembly
Tools required: tube fluorinated Krytox grease (PN 55593)
1-1/4" wrench
screwdriver (flat-blade)
socket wrench
isolation valve needle housing socket (PN 68509)
NOTE: See Table 4-6 on page 33 and Figure 4-1 on page 34 for additional parts information.
1. Coat all new O-rings with fluorinated Krytox grease before installing.
2. Install the small O-ring (27) into the end cap (13) inner groove.
3. Add mylar washers (41) or (42) to each side of shaft (14).
NOTE: Part number and quantity will vary. Washers are used to adjust vertical play in shaft (14). Try one item (41) on
each side to start.