19
PI-190
June 2019
6.2 ASSEMBLY (See Figure A)
1. Ensure the new mandrel (8a), flange bushing (8b), and head assem-
bly (7) are clean.
2. Install new o-rings (8e) and backup rings (8d) onto the flange bush-
ing (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 binding
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 as-
sembly (7) so that it sits flat against the flange of the flange bushing
(8b).
7. Apply 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 vice or with a 1-1/4” wrench and push the mandrel (8a) through
the flange bushing (8b) into the inlet nut (4). Use a 3/8” socket
wrench to torque to approximately 30 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 as-
sembly. Attach the wear ring (5) to the head assembly (7) by rotat-
ing 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).
