Apeks Regulator Service and Repair Manual
13
lever until the shuttle valve drops slightly, while viewing its position
through the outlet port of the spindle (see Fig. 11). Then, raise the
lever halfway up until it is perpendicular to the valve spindle.
8. Being careful to avoid disturbing the engagement of the lever with
the shuttle valve, lay the valve spindle horizontal with the lever fac-
ing up. While holding the spindle secure, mate the adjusting screw
into the open end of the spindle, and hold it pressed inward while
turning it clockwise until the threads are engaged.
Watch to ensure that the lever rises initially as the adjusting
screw is installed into the valve spindle. If the lever does not
rise, the arms are not properly engaged with the shuttle valve.
Disassemble and repeat steps 6-8 before proceeding.
9. Insert the retaining pin(18) into the valve spindle, near the grooved
flange. Hold it centered in place, and then turn the adjusting screw
completely out counter-clockwise until it stops. This will hold the
pin securely in place to prevent it from falling out while installing the
valve module into the case.
10. Install the O-ring(13) onto the venturi lever(17).
11. While holding the valve lever depressed against the spindle, fit the
venturi lever over the threaded inlet with the plastic lever facing to-
ward the adjusting screw. Gently pass it over the spindle until it is
seated against the opposite end, and then slowly release the valve
lever to prevent it from springing up.
Be careful not to turn the external adjusting screw while installing the
venturi lever onto the valve spindle. It is very important to keep the
screw turned completely out counter-clockwise, in order to hold the
retaining pin in place.
12. Install the O-ring(20) onto the seat crown(19), and carefully insert
the threaded end of the crown into the inlet end of the valve spindle.
Gently press it in further with the blunt end of the seat extraction tool
(P/N 1094-36) until it stops (see Fig. 12).
13. Apply a 5mm hex key to the head of the seat crown, and turn the
crown clockwise to engage the threads. Continue turning the crown
clockwise only until the lever begins to drop slightly.
14. Orient the case with the exhaust valve facing down, at 6 o’clock. While
holding the lever depressed, guide the inlet end of the valve spindle
through the opening in the right side of the case and into the opening
on the opposite side, until the lever can stand up (see Fig. 13). Check
to ensure that the venturi lever is correctly aligned to fit in its groove
outside the case, and the valve lever is facing straight up. Carefully
guide the valve spindle completely to the left until the flange is seated
flush against the inside of the case, and the arms of the lever are posi-
tioned inside the retaining tabs on either side (see Fig. 14).
15. While holding the valve module securely seated inside the case, fit
the O-ring(4) down over the threaded inlet of the valve spindle.
NOTE
Figure 11
Installing Shuttle Valve - Step 3
Figure 12
Installing Seat Crown
Figure 13
Installing Valve Module
Figure 14
Correct Index of Valve Spindle w/ Case
