TM 55-1520-240-23-9
11-90.1
REPLACE INSERTS IN CONTROL PALLET STA 95 AND STA 120 (AVIM)
(Continued)
11-90.1
PREPARE PALLET
1.
Remove defective insert (1). If insert is loose
enough, carefully remove it by hand. Go to step
2. If insert is bonded into pallet, drill or bore out
insert as follows:
a.
Select suitable drill bit or counterbore.
Use 11/16 inch drill bit or counterbore for
NAS1835A3M inserts. Use 3/4 inch drill bit
or counterbore for NAS1835A4M inserts.
b.
Install boring tool in drill press. Adjust table
height.
c.
Limit depth of bore to at least 1/8 inch from
opposite face of pallet.
d.
Align insert to be drilled or bored out on drill
press table. Clamp pallet (2) in place. Use
C-clamps and wood blocks. Avoid excessive
clamping pressure.
e.
Set drill press to highest speed. Slowly drill
out insert. Remove pallet.
2.
Clamp pallet (1) to workbench. Use C-clamps
and wood blocks.
NOTE
Do not leave a smooth surface within
the bore. Proper adhesive bonding
requires a rough surface.
3.
Enlarge diameter of bore in honeycomb (3)
below surface plate (4). Do not enlarge hole (5)
in surface plate.
4.
Vacuum debris from hole (5). Clean the area
around the hole with a clean cloth (E120) damp
with acetone (E20) or methyl-ethyl-ketone
(E244). Wear gloves (E184.1) and goggles.
11-484
