
19
PI-197
January 2022
6.2 ASSEMBLY (See Figure A)
1.
Ensure the new mandrel (8a), flange bushing (8b), and head
assembly (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 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
assembly (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
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).