15
REPLACEMENT OF WORN PARTS (
continued
)
REPLACING THE RESIN NEEDLE PACKING
1. Remove the button head screw (65) that retains the guard
assembly (64) by using a 3/16" allen wrench; remove the
guard assembly.
2. Using two standard screwdrivers, remove the trigger stud
(60), the trigger screw (61), the trigger (62), and the chop-
per trigger assembly (54).
3. Using 3/8" wrench or socket, remove the head retainer (51).
4. Slide the gun head (9) as far forward as it will go with your
hands. Do not use excessive force.
5. Unscrew the resin packing nut (15) with a 3/8" wrench and
pull the resin needle assembly (11) straight back until it
comes out of the gun head. Be sure to pull the needle out
without bending it up or down or side to side as this will
cause the needle to bend, thus ruining the needle.
6. Clean the needle assembly so that you may be able to
clearly identify the packing (13).
7. The packing is the only non-metal piece of the needle
assembly and is white in color. Note its location and orien-
tation on the wire of the needle. Cut the worn packing away
with a sharp knife being sure not to scratch or deform any
nearby parts.
8. Carefully spread the new packing apart, about 3/64" at the
edge (this can be done easily with an X-acto type knife) and
press the packing onto the wire of the needle assembly in
the same location and orientation as noted in step 7. Gently
squeeze the packing closed with fingers.
9. Slide the packing forward and back with your fingers to
assure a proper fit onto the wire.
10. Reassemble in reverse order.
REPLACING THE RESIN NEEDLE ASSEMBLY
1. Repeat steps 1 thru 5 from section
“Replacing the Resin
Needle Packing”
above.
2. Replace worn needle assembly with new needle assembly.
3. Reassemble in reverse order.
REPLACING THE CATALYST NEEDLE ASSEMBLY
1. Repeat steps 1 and 2 from the section
“Replacing the
Catalyst Needle Packing”
above.
2. Replace worn needle assembly with new needle assembly.
3. Reassemble in reverse order.
REPAIRING THE AIR ASSIST VALVE ASSEMBLY
1. Repeat steps 1 and 2 from section
“Replacing the Resin
Needle Packing.”
2. Using a 9/16" wrench remove the air assist valve assembly
(33), seal (38), and spring (39).
3. Remove the nut (34) from the body (36); the packing (35)
can be replaced if necessary.
4. Remove and inspect the valve assembly (37) from the body
and replace if necessary.
5. Replace the spring if necessary. Replace the seal (38) and
reassemble in reverse order.
REPAIRING THE CHOPPER AIR VALVE ASSEMBLY
1. Repeat step 2 from section
“Replacing the Resin Needle
Packing”
.
2. Remove the chopper valve assembly (26), from the
handle (41).
3. Using a screwdriver, remove the screw (86) from the
chopper valve assembly (26).
4. Manually pull and remove the screw (28), with attached
components from the air valve body (84).
5. Remove and replace the o-ring, (29), from the stem (88).
6. Lubricate the o-ring and inside surface of the air valve body
(84) with petroleum jelly.
7. Re-assemble the chopper air valve in the reverse order.
Assembly
Orifice
Gel/Resin
Number
Size
Tip Sizes
102-2513
.013
.013 - .018
102-2515
.015
.015 - .021
102-2518
.018
.015 - .021
102-2521
.021
.021 - .031
102-2526
.026
.026 - .043
102-2531
.031
.031 - .052
102-2536
.036
.043 - .072
NOTE
The cone face of the packing should point towards the
ball of the needle assembly.
NOTE
These are general recommendations. Due to variations in viscosities of
catalyst and resin (Gel-Coat), actual optimal sizing may differ. The intent
is to optimize mix by minimizing catalyst pressure.
NOTE
Periodic lubrication of the chopper air valve assembly is
necessary to ensure smooth operation.
The OLD style chopper air valve assembly (102-2618) is
no longer supported by Binks. Contact Binks to obtain the
NEW style chopper air valve assembly.
CATALYST INJECTOR SIZING CHART
