MEGA 120E PUMP OPERATION / MAINTENANCE MANUAL
PAGE 21
Figure 4-5
•
Insert shaft through shaft bore as shown in Figure 4-5. (Use shaft bullet tool to
prevent damage to shaft or shaft bushing.)
•
Thread on remaining push plate until push plate bottoms out on shaft shoulder.
•
The second push plate, while in the pump body, cannot be visually aligned. Tighten
push plate to 48 oz.-in, then insert alignment pin into locking screw hole. Rotate push
plate CW until locking screw hole is aligned with the next available hole in shaft and
alignment pin drops into the shaft hole. Remove alignment pin.
•
Install push plate locking screw. Tighten to 12 oz.-in.
4.8.c Final Assembly
(See Section 4.4, Parts Illustration, for reference.)
•
Insert tie bolts into head (press fit) and lay head flat with tie bolts sticking up.
•
Place main seal into the main seal groove in head.
•
Install two diaphragms, removing all air from between diaphragms, onto the
tie bolts and shuttle transfer tube. Note main seal groove alignment.
•
Place body assembly onto tie bolts and head.
•
Place remaining two diaphragms onto tie bolts. Note main seal groove
alignment.
•
Place the main seal O-ring into the formed groove of the diaphragms.
•
Flip the head over and insert the tie bolts into the second head. Ensure that
the main seal is not dislodged.
•
Place all bushings & flat washers onto tie bolt threaded ends.
•
Install flange nuts onto tie bolts. Tighten evenly in a star pattern (do not
overload one side before applying torque to another as dislodgment of main
seal can occur). Final torque is 80 in-lbs.
