20
PI-198
December 2020
6.2 ASSEMBLY (See Figure A)
1. Ensure the new mandrel (8a), flange bushing (8b), and head as-
sembly (7) are clean.
2. Install new o-rings (8e) and backup rings (8d) onto the flange
bushing (8b). Apply a light coat of o-ring lube to o-rings to reduce
friction and ease installation. See Figure B for proper orientation of
o-rings when installed.
Figure B
3. Wet o-rings (8e) on the flange bushing (8b) very lightly with water
or grease. Slide the flange bushing (8b) into the head assembly (7)
from the front side.
4. Thread the adjuster (3) onto the inlet nut (4) until the inlet nut (4)
seats fully into the adjuster (3).
5. Insert the assembled adjuster and inlet nut into the back of the
head assembly. The adjuster (3) should slide in easily without bind-
ing between the OD of the magnet ring and ID of the groove in the
head.
6. Insert the thrust bearing (8c) into the front bore of the head assem-
bly (7) so that it sits flat against the flange of the flange bushing
(8b).
7. Apply 1-2 drops of Loctite 242 Blue Medium-Strength Threadlocker
to the thread at the end of the mandrel (8a). Hold the inlet nut (4)
hex stationary in a vise or with a 15/16” wrench and push the
mandrel (8a) through the flange bushing (8b) into the inlet nut (4).
Use a 1/4” socket wrench to torque to approximately 22 lb-ft.
8. Slide the wear ring (5) onto the head assembly (7) with the nozzle
installation clearance cutouts facing the front end of the head
assembly. Attach the wear ring (5) to the head assembly (7) by
rotating the wear ring (5) so that the holes in the wear ring (5) line
up with the holes in the head assembly (7) and threading the wear
ring screws (6) into the head assembly (7).
9. Use retaining ring pliers to install the retaining ring (1) into the
groove closest to the adjuster (3) on the inlet nut (4).
