User's Manual

Maintenance
312753E 11
4. Using a clockwise twisting motion, pull the entire
nozzle grip assembly out of the MixHead body.
5. If the injection nozzle will not come out with the noz-
zle grip assembly, use the nozzle ejector tool to
remove the injection nozzle. See Additional Tools
and Accessories on page 29.
Nozzle Grip Cleaning
6. Flush remaining chemical and dirt from the nozzle
grip bore and mating surface of the MixHead body.
7. Disassemble the nozzle grip assembly and soak the
metal parts in solvent.
8. Clean the parts thoroughly,
9. Inspect for damage and/or wear and replace as
required.
10. Inspect the three o-rings (2, 3, 4) and replace as
required.
Nozzle Grip Assembly
Installation
With all parts clean and dry, assemble and install the
nozzle grip assembly as follows.
1. Lightly coat the injection needle (17) with Lubriplate
grease. Screw the injection needle (17) into the noz-
zle grip (9) until the shoulder of the injection needle
bottoms out in the nozzle grip counterbore.
2. Lightly coat the medium o-ring (3) with Lubriplate
grease and install on the end of the injection
nozzle (18).
3. Mount the injection nozzle (18) on the nozzle
grip (9).
4. Lightly coat the large o-ring (2) with Lubriplate
grease and install on the nozzle grip (9).
5. Lubricate the nozzle grip (9) with Lubriplate grease.
6. With the roll pin (FA) on the nozzle grip (9) in place
and lined up with the slot (FB) in the MixHead body,
insert the nozzle grip into the MixHead body.
7. Install the four M8 screws (13) hand tight.
8. Use a torque wrench to alternately tighten each
screw 1/2 turn at a time to 180 in-lb of torque.
9. Thread the two set screws (14) into the nozzle grip
until the screws contact the MixHead body.
10. Apply Lubriplate grease to the small o-ring (4) and
insert it into the nozzle grip (9).
11. Install and tighten down the hex o-ring seat (5) onto
the nozzle grip (9).
12. Install and hand tighten the locknut (6).
13. Recirculate all chemical lines until the pressures
stabilize.
14. Pressurize the MixHead and check for chemical
leaks.
15. Set the desired impingement pressure.
a. Loosen the locknut.
b. Turn the adjustment stem until the desired
impingement pressure is achieved.
c. Retighten the locknut.
See FIG. 2 on page 10.
The roll pin in the nozzle grip allows only one
method of insertion, ensuring that the chemical
openings in the nozzle grip and MixHead body will
be correctly aligned. Do not insert a nozzle grip
without the roll pin in place, or the nozzle grip may
be installed upside down in the body, causing the
chemical entering the MixHead to accumulate at
the nozzle grip and clog it.