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Electrical Components -706880288
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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SOFT SUCTION HOSES -706880290
TM 5-4210-233-14&P-1
4-10. HARD SUCTION HOSES
This task covers:
a. Inspection
c. Repair
b. Testing
CAUTION
If there is even suspicion of damage to sleeve or couplings,
replace hose.
a. Inspection.
NOTE
Hard suction hoses are located in equipment storage rack at
rear of truck.
(1) Visually inspect hose (1) for deep cuts or holes.
(2) To inspect swivel gaskets (2) remove gaskets and pinch together between the thumb and index
fingers; check for cracks, creases, and general elastic deterioration.
(3) Install gaskets (2) in hose.
b. Testing.
(1) Cap hose end and connect to a vacuum source.
(2) Gradually increase vacuum to 23 inches of mercury for three minutes.
(3) Check hose for leaks and/or distortion of sleeve.
(4) To pressure test hose, cap hose end and connect to a water pressure source.
(5) Gradually increase pressure to 200 psi (1371 kPa) and hold for 5 minutes.
(6) Check hose for leaks and/or distortion of sleeve.
c. Repair.
(1) Install new gaskets (2) if found defective or damaged.
(2) Replace hose if found defective during inspection or testing.
4-160

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