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Repair
24 311320G
Centerline Component
Installation
1. Remove felt wiper assembly from rear of
mixing chamber.
2. Ensure internal mixing chamber parts are
in place.
3. Insert chamber into gun block. Align key-
way in chamber with pin protruding from
top of hole in block.
FIG. 25: Mixing Chamber Insertion
4. Press chamber into block so that flange is
1/32 - 1/16 in. above face of gun block.
FIG. 26: Chamber Positioning
5. Thread felt wiper assembly into back of
mixing chamber. Do not tighten.
6. With rear of gun block facing palm of your
hand, place mixing chamber insertion block
over nose of chamber so it rests squarely
on the chamber flange. Firmly tap insertion
block with hammer until flange of chamber
is flush with face of gun block (FIG. 27).
FIG. 27: Chamber Seating
7. With o-ring in place on underside of gun
frame, assemble block to frame.
8. Install valving rod assembly. If using new
felt wiper, push valving rod through felt with
retainer case off chamber. Remove felt
wiper and any felt buildup on tip of rod.
Install wiper, hand tighten into rear of
chamber in gun block. Then insert valving
rod through piston in air cylinder, guiding it
through center of felt wiper retainer. Use
firm pressure to carefully push valving rod
into mixing chamber until piston of air cylin-
der bottoms out.
9. Check valving rod clearance. If it does not
extend approximately 1/32 in. (1mm)
beyond tip of mixing chamber, see Valving
Rod Adjustment, page 21.
All gun block parts must be clean and free
of damage before installation.
1/32 in.
1/16 in.
CAUTION
Failure to install felt wiper in rear of chamber
allows internal chamber parts to fall out
when chamber is tapped into place.
Chamber Insertion Block