Condec MPV-10K - Manual (Page 8)

6 Orion/MPV-10K Adjustment & Maintenance Manual
6. Clean both the needle (11) and housing (10) in solvent, dry the parts and apply a small amount of
fluorinated Krytox grease to the needle threads before reassembly.
7. Assemble the needle into the valve housing and turn it until it stops.
8. Reinstall the needle/housing assembly into the valve cavity until finger tight.
9. Mount the manifold body (16) in a vise. For the pressure and vent valves (outer) only, torque the
needle/housing assembly to 325 in. lbs. using the needle housing socket (PN 65580) and torque wrench.
10. Install the housing lock nuts (1) onto the housing (10) and tighten until snug with the 3/4" socket.
11. Using the .050" hex wrench, install and tighten the lock nut (2) and set screw (34).
12. Install the knob insert (4) and nylon washer (33) over the needle shaft (11), align the set screws (23) with
the indents and tighten with the .061" hex wrench.
13. For the ISOLATION or VACUUM (inner) valves, install the needle housing (19) and tighten until snug
using the housing installation socket (PN 68509) and torque wrench (there is no specified torque, so use
care when tightening so as not to break the socket nibs).
14. Install the gear (6) over the isolation or vacuum (inner) valve needle (18) shaft, align the set screws (26)
with the indents and tighten with the .061" hex wrench.
15. Apply a small amount of fluorinated Krytox grease to the threads of the isolation or vacuum (inner) valve
needle(s) (18) and install into the valve by turning counter-clockwise. Rotate the gear counter-clockwise
until the needle just stops at the seat.
2.7 MPV-10K Manifold - Valve Seat Removal
(MPV-10K - refer to the list of parts - Table 2-4 on page 19, and Figure 2-12 on page 21)
Tools required: A/R solvent (de-natured alcohol)
socket wrench
3/4" socket
needle housing socket (PN 65580)
isolation valve needle housing socket (PN 68509)
hex wrench (.050")
hex wrench (.061")
needle-nose pliers
tube fluorinated krytox grease (PN 55593)
hand drill
No. 43 drill
No. 4-40 tap
tap handle
small hammer
1. Secure the manifold in a bench vise by its center portion with the valve knob pointing upward.
2. Using the .061" hex wrench, loosen and remove the knob (15) and the nylon washer (14) from the
pressure valve stem (3) or (6).
3. Using the .050" hex wrench, loosen and remove the set screw (13) and lock nut (12).
4. Loosen the 3/4" lock nut (11) on the pressure valve threaded needle housing (2).
5. Using the needle housing socket (PN 65580) and socket wrench, loosen and remove the needle/housing
assembly (2,3) or (2,6).
6. Remove the valve stem seat (10) and valve needle seat (5) by using the needle-nose pliers.
7. Remove the inner and outer O-rings and back-up rings (7,9) from the valve stem seats and wash all parts
in solvent.
8. To remove valve seat (4), blow compressed air through the inlet and outlet fittings. If this is unsuccesful,
the center holes will have to be drilled and a tap used to extract the seat (steps 9 - 12).
9. Using the hand drill with 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 (4).
10. Blow out any chips from the seat area using compressed air.
11. While holding the 4-40 tap perpendicular to the seat, steadily and slowly turn until the tap starts to
engage the seat.