WARNING - TM-5-4930-230-13

TM-5-4930-230-13 Tank and Pump Unit Liquid Dispensing for Truck Mounting (Advanced Industries Model 1800) FSN 4930-070-1181 Manual
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TM5-4930-230-13 (d.) Conduct a combustible vapor test combustible vapor test reading to determine if the tank is safe to repair. If reading indicates tank is not safe, repeat procedure of subparagraph (C). c. Inspection of the Tank Assembly. (1) Check the tank for the condition of the paint. (2) Check the tank for dents that require repairs. Check dents on welds for breaks in the weld seam. Check for any damage or wear that has caused a rupture or leak. (3) Check the interior of the tank for general cleanliness and the presence of contaminants. WARNING When using compressed air, wear safety goggles or glasses and ensure air blast is not directed at another person. Do not direct compressed air against the skin. ( 4 ) W h e n t e s t i n g t a n k, completely dry and clean the interior and exterior of the tank of all foreign matter. When the tank is completely dry and clean, c l o s e a l l o p e n i n g s s u c h a s v a l v e s a n d f i l l c a p , p l u g a n d f i l l c a p v e n t , a n d subject the tank to a constant internal air pressure of 3 to 5 pounds per square inch gage (PSIG). Spray liquid detergent conforming to P-D-223 over the entire e x t e r i o r s u r f a c e o f t h e t a n k a t a p r e s s u r e o f n o t l e s s t h a n 7 0 P S I G ( h a n d sprayer). A p p l y i n g t h e l i q u i d d e t e r g e n t b y b r u s h o r o t h e r m e a n s i s n o t acceptable. Observe the exterior of the tank. Leaks as evidenced by fizzing o r b u b b l i n g o f t h e l i q u i d d e t e r g e n t , s u r f a c e r u p t u r e , d e f o r m a t i o n , o r b r o k en hardware shall constitute failure. d. Repair of the Tank Assembly. WARNING If conditions require fuel tank repairs by welding or other methods involving heat or flame, take care to assure that all fumes are purged from the tank or fill tank with water before commencing the repair. possible, tank should be filled with water prior to welding after being thoroughly purged of fumes. Applying heater flame to a fuel tank containing residue may result in a violent explosion, causing injury or death to personnel. (1) Repair all dents, cracks, breaks, and holes in the tank. Weid ruptured weld seams and other damage. Replace badly damaged parts. WARNING When using compressed air, wear safety goggles or glasses and ensure air blast is not directed at another person. Do not direct compressed air against the skin. ( 2 ) N o r e p a i r w i l l b e i n i t i a t e d o n t h e t a n k u n t i l i t h a s b e e n t h o r o u g h ly vented and cleaned. Before attempting to do any welding repair on the tank, d r i l l f o u r 1 - ½ i n. dia. drain holes in each skid (total of 8 holes required). F o r t h e l o c a t i o n o f d r i l l i n g p o i n t s , s e e f i g u r e 5 - 1 5. Provide corrosion protection to drilled holes and leave open. If there is evidence of fuel inside the skids when holes are drilled, purge the skids by steam cleaning or other suitable method. T e s t f o r l e a k s b y f i l l i n g t h e t a n k a p p r o x i m a t e l y ¼ f u l l of water, sealing all holes in skid except one and applying compressed air (not Change 2 5-31

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