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TM 07661B-14/1
APPENDIX A
(3)
Loosen swivel end of hose (2) at regulator tee subassembly. Disconnect low pressure hose (2) from elbow
(3) on tank piping.
(4)
Disconnect discharge hose (4) from short nipple (5) on tank discharge piping.
(5)
Unplug heater.
(6)
Disconnect valve rod (6) from AFFF shutoff valve by removing nut (7) from ball valve (8).
(7)
Remove four mounting bolts (9), with flat washers, and lock washers, and nuts. The mounting hardware is
stainless steel. Retain for reassembly.
(8)
Use a suitable crane and sling to lift AFFF tank and piping from skid frame.
CAUTION
Do not lift on piping. Damage to piping may occur.
b.
Disassembly. Remove piping from AFFF tank as follows:
(1)
Uncouple union (10). Using a pipe wrench, loosen and remove brass pipe (11) along with attached piping
from tee on top inlet of tank. Then remove tee (12), close nipple (13) and relief valve (14) from inlet port.
(2)
Remove protective covering, insulation and heat tape from outlet tube and shutoff valve.
(3)
Using a pipe wrench, remove remaining piping from tank outlet port.
(4)
Remove heater assembly only if necessary. Refer to paragraph 3-42.
c.
Assembly. If piping components were disassembled beyond extent indicated in b above, reassemble
components into piping subassemblies.
NOTE
Before connecting pipe fittings, apply four wraps of teflon tape (MIL-T-27730A) one to two
threads from end of any male pipe fitting. Apply two to three drops of Loctite 342 at the
leading edge of the tape. Surface of tape must be clean and free from dirt, grease or oil before
applying Loctite.
(1)
Installpiping subassembly on tank outlet port as shown in figure 3-6. Wrap outlet tube and shutoff valve
with heat tape, insulation and protective covers. Seam with white plastic tape.
(2)
Install relief valve (14), tee (12), and nipple (13) on inlet port.
(3)
Install piping subassembly into tee (12). Recouple piping subassemblies at union (10).
(4)
If removed, install heater assembly. Refer to paragraph 3-42.
d.
Installation.
(1)
Install fusible plug (1) in drain port of AFFF tank.
(2)
Using suitable equipment, lift tank and related piping into position on skid frame. Install stainless steel
bolts, flat washers, lock washers and nuts to secure tank to frame, figure 3-6.
A 3-19
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