TM 55-2835-209-23
Section V CLEANING PROCESS #5 (GLASS BEAD)
8-5 CLEANING PROCESS #5 (GLASS BEAD) (AVIM)
INITIAL SETUP
Tools:
General Safety Instructions:
Blasting Cabinet
Insulated Mittens
Oven
Personnel Required:
68B Aircraft Powerplant Repairer
Materials/Parts:
Glass beads (D4)
Pressure Sensitive Tape (D38)
Equipment Conditions:
APU on Aircraft
Heated components can pose a
serious burn potential.
Wear
insulated mittens when han-
dling heated components.
Do not glass bead peen parts
until non-destructive testing
has been performed. Maximum
pressure of 20 PSIG shall be
used on titanium couplings.
Maximum pressure of 40 PSIG
shall be used on all other
coupling materials.
2.
Regulate air pressure to keep
erosion of base metal to a mi-
3.
nimum.
Keep nozzle in motion
to prevent blast from dwelling
on one spot.
NOTE
All parts should be
using process No. 1
glass bead peening.
4.
cleaned
prior to
5.
1.
Mask any surface that could be dam- 6.
aged by peening.
Using pressure
sensitive tape (D38).
FOLLOW-ON MAINTENANCE: None.
Place parts in blast cabinet so they
can be handled and not damaged by
contact with cabinet or other parts.
Direct stream at a slight angle
across surface.
Repeat until sur-
face is clean.
Remove parts.
Rinse in clean tap
water until all residue is removed.
Dry parts in oven at 205 to 233°F
(96 to 112°C) for 1 hour.
Remove from oven.
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