TM 55-2840-231-23
2-17. Diffuser Scroll - Repair - Continued
DIFFUSER SCROLL/ -
Continued
2. Air Tube Insert
Blend Repair
Methylethylketone (item 32, Appendix D).
Heat Resistant Aluminum Paint (item 33,
Appendix D).
Cres Paint (item 34, Appendix D).
Lacquer Reducer (item 35, Appendix D).
Abrasive Paper (item 36, Appendix D).
Lockwire (item 7, Appendix D).
c. Touchup damaged
bichromate coating
(abraded areas) by
chrome pickle per
MIL-M-3171.
d. Clean surface with
methylethylketone
and air dry 5 to 10
minutes.
e. Touchup aluminum
painted scrolls with
heat resistant alumi-
num paint. Touchup
spray-painted scrolls
with two parts gray
Cres paint to one
part lacquer reducer by
volume.
f. Air dry at least one
hour. Localized heat
curing is permissible.
a. Using abrasive paper
blend and polish wear
in the OD of the air
tube inserts which does
not exceed 0.010 in.
(0.025 cm) depth.
Blend and polish wear
step as necessary to
insure freedom of
movement of the air
tube seals and to insure
that the sealing proper-
ties will not be im-
paired.
b. Install a new tube
and secure with clamp,
washer and screw.
Secure the screw with
lockwire.
Change 5
2-67
