TM 5-3740-214-14
FORMULATION TANK ASSEMBLY MAINTENANCE (Continued)
(c) Remove filter body from pick up tube.
(d) Separate bushings from filter base.
(e) Remove pick-up tube from tank.
Figure 5-281. Formulation Tank Filler Cap
(6) Disassemble filler cap.
(a) Remove filler cap bracket.
(b) Remove filler cap.
c. Clean formulation tank. Clean formulation tank inside and out with hot soap and water. Use cleaning compound
such as MIL-D-16791E.
d. Test formulation tank.
NOTE
Test formulation tank before it is disassembled.
(1) Test fittings and welded seams for leaks.
(a) Drain all fluid from tank.
(b) Turn solenoid valve switch OFF on control panel.
(c) Pressurize tank and shut engine OFF.
(d) Spread a soap lather over all fittings and seams. If bubbles blow through the lather, there is a leak at
that spot.
(2) Test pressure gage and pressure regulator.
(a) Release pressure from tank.
(b) Remove safety valve from tee.
(c) Place a calibrated pressure gage in the tee.
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