P r e v e n t i v e M a i n t e n a n ce Checks and Services for M48A15 AVLB Hull - C o n t i n u ed - TM-5-5420-226-20-1_154

P r e v e n t i v e M a i n t e n a n ce Checks and Services for M48A15 AVLB Hull - C o n t i n u ed - TM-5-5420-226-20-1_153

P r e v e n t i v e M a i n t e n a n ce Checks and Services for M48A15 AVLB Hull - C o n t i n u ed - TM-5-5420-226-20-1_155

TM-5-5420-226-20-1 Medium Girder Bridge Incuding Bridge Set Bridge Erection Set Link Reinforcement Set Manual
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TM 5-5420-226-20-1 P r e v e n t i ve M a i n t e n a n ce Item No. 47 Interval Semiannual C h e c k s a n d S e r v i c e s f o r M 4 8 A 5 A V L B H u l l - Location Item to Check/Service Fixed Fire Extinguisher System - Continued C o n t i n u ed Procedure Clocked time for CO₂cloud duration is valid only when all other checks (non-electrical) are acceptable. If all checks are met except cloud duration time, No. 1 cylinder was defective. If any defects are found, correct de- fects, and retest. If no defects are found, continue with step 12. Step 11 If retest is needed, reset control han- dle by positioning pawl into slot, re- set No. 1 control valve, and replace cylinder No. 1. Repeat steps 7 through 10 to retest cloud/spray duration time, Not Fully Mission Capable if: NOTE If delay valve is still open (from having fired No. 1 shot), there will be no (6 to 10 second) delay of CO₂when a subsequent shot is fired. Opened delay valve may take 2 to 4 hours to thermally reseat before it can delay another CO₂shot. (Resetting is not necessary to time cloud duration.) Step 12 If only one hull spray line dis- charges, check valve on other line and check for clogged or pinched lines. 3-86 Change 6

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