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PUMP, PIPING, AND VALVES - Continued
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TM-5-4210-220-12 Truck Firefighting: Powered Pumper: Foam and Water 500-GPM Capacity; Centrifugal Pump Power Takeoff Driven Manual
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TABLE OF RECOMMENDED TORQUE VALUES
TM 5-4210-220-12 4-18.  PUMP, PIPING, AND VALVES - Continued 4-18.3 Victaulic Couplings. This task covers    Replacement TOOLS MATERIALS/PARTS Tool Kit, General Mechanic, Automotive, 21, Appendix E Petroleum Jelly NSN 5180-00-177-7033 75-E-1.5" Victaulic Seal 75-E-2.5" Victaulic Seal EQUIPMENT CONDITION 75-E-4.0" Victaulic Seal Main Engine Shutdown (see para. 2-10) 75-E-5.0" Victaulic Seal APU Shutdown (see para. 2-12) Batteries Disconnected (see para. 4-24) All Piping Drained NOTE To replace some couplings, it may be necessary to remove the heat shields (see para. 4-11) or to drain the water tank (see Chapter 2). REPLACEMENT (1) Remove the nuts (1) and capscrews (2) retaining the clamp halves (3) together. (2) Separate the clamp halves (3) and remove.  It may be necessary to break the seal between the gasket (4) and the clamp halves (3) using a small hammer. (3) Remove gasket (4) from pipe and discard. (4) Clean the pipe ends (5) and inspect for damage such as indentations,  roll  marks  or  projections  that  might  cause the   gasket   (4)   to   leak   Replace   defective   piping   as required. (5) Inspect clamp halves (3) for cracks or dents. (6) Using  petroleum  jelly  (item  21,  Appendix  E),  uniformly lubricate the entire gasket (4) and the pipe ends (5). (7) Install new gasket (4) onto one pipe. (8) Maneuver the second pipe and slide the gasket (4) onto it.  Center the gasket over both pipes (5). (9) Position  the  clamp  halves  (3)  over  the  pipes  (5)  and gasket   (4)   Ensure   the   clamp   lips   lay   in   the   rolled grooves. (10) Install  the  capscrews  (2)  and  nuts  (11)  and  tighten  as indicated 4-224

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