TM 55-1520-240-23-4
5-81.6
PREPARE ADHESIVES
5-81.6
INITIAL SETUP
Applicable Configurations:
All
Tools:
Trip Balance, NSN 6670-00-401-7195
Materials:
Gloves (E186)
Polyethylene Cup (E157)
Wood Spatula (E424)
Adhesives (E27, E40, E41, and E47.1)
Hardner (E194.1)
Personnel Required:
Aircraft Structural Repairer
General Safety Instructions:
Adhesives (E27, E40, E41, and
E47.1) and hardner (E194.1) are
flammable and toxic. They can irritate
skin and cause burns. Use only in
well-ventilated area, away from heat
and open flame. In case of contact,
immediately flush skin or eyes with
water for at least 15 minutes. Get
medical attention for eyes.
ADHESIVE EA9309.3NA (E40 OR E41)
NOTE
Prepackaged adhesive (E40) is
preferred. Use adhesive (E41) only if
prepackaged kit is not available.
1.
Mix tube of adhesive (E40) according to
instructions on kit.
2.
Prepare adhesive (E41) as follows:
a.
Weigh 100 parts of resin part A (pink paste)
and 23 parts of hardener part B (blue liquid).
Use trip balance.
b.
Mix parts in polyethylene cup (E157) until
color is uniform dark pink. Use wood spatula
(E424).
NOTE
Working life of adhesive (E40 or E41)
is 30 minutes. Adhesive cures in 2
hours at 150º - 160ºF (66º - 71ºC). A
serviceable cure can be achieved at
70º - 80ºF (21º - 27ºC) in 24 hours.
Pressure may be removed after 12
hours.
ADHESIVE EC-2216 (E27)
3.
Weigh 7 parts of part A hardener (gray paste)
and 5 parts of part B base (cream paste). Use
trip balance.
4.
Mix parts in polyethylene cup (E157) until color is
uniform medium gray. Use wood spatula (E424).
NOTE
Working life of adhesive (E27) is 1
to 2 hours. Adhesive cures in 2
hours at 150º - 160ºF (66º - 71ºC). A
serviceable cure can be achieved at
70º - 80ºF (21º - 27ºC) in 24 hours.
Pressure may be removed after 12
hours.
ADHESIVE EPON 828 (E47.1) AND HARDENER
VERSAMID 125 (E194.1)
5.
Weigh equal parts of adhesive (light amber
resin) and hardener (dark amber resin). Use
trip balance.
6.
Mix parts in polyethylene cup (E157) until color is
uniform. Use wood spatula (E424).
NOTE
Working life of adhesive mix (E47.1
and E194.1) is 1 hour. Adhesive
cures in 2 hours at 150º - 160ºF (66º
- 71ºC). A serviceable cure can be
achieved at 70º - 80ºF (21º - 27ºC) in
24 hours. Pressure may be removed
after 12 hours.
FOLLOW-ON MAINTENANCE:
As Required
END OF TASK
5-488
