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Inspect cam follower bores
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TM-9-2320-364-34-4 Palletized Load System (PLS) M1074/M1075 Manual
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If leak is found in cylinder head
TM 9-2320-364-34-4 20-138 20-49.  CYLINDER HEAD REPAIR (CONT). c. Pressure Testing. NOTE Perform magnetic particle and fluorescent penetrant inspections before pressure testing. These inspections will locate exterior cracks.  Replace cylinder head if cracks are detected. (1) Install four injectors (1) (removed in Para 4-2) with clamps (2), washers (3) and screws (4) in injector tubes (5).  Tighten screws 20 to 25 lb-ft (27 to 34 N.m). Adhesives, solvents, and sealing compounds can burn easily, can give off harmful vapors, and are harmful to skin and clothing.  To avoid injury or death, keep away from open fire and use in well- ventilated area.  If adhesive, solvent, or sealing compound gets on skin or clothing, wash immediately with soap and water. (2) Apply coat of sealing compound to threads of eight screws (6). (3) Install four gaskets (7) and covers (8) on cylinder head (9) with eight screws (6). Tighten to 26 to 29 lb-ft (35 to 39 N.m). (4) Align test fixture on top of bottom face of cylinder head (9) so rubber stoppers cover water inlets (10). Do not overtighten hold-down cap screws.  Rubber stopper could distort enough to seal off outer diameter of water nozzle. Leak would not be detected from outer diameter. (5) Install and tighten six hold down screws on test fixture until rubber stoppers start to flatten out.

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