TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM 9-2815-202-34 4-38. CYLINDER HEAD REPAIR (Cont) c. Pressure Check NOTE (1) (2) (3) (4) Before pressure checking cylinder head, insure four cover plates (47), cup plug (54), two pipe plugs (54), fuse plug (52), and five exhaust manifold studs (50) are in position. Install scrap or dummy injectors to properly seal injector tubes. Torque injector clamp bolts to 20-25 Ib-ft (27-34 N-m). Using cylinder head pressure testing kit, install fabricated end plate (64) and gasket over hole in front of cylinder head. Secure with bolts from kit. Torque bolts to 30-35 Ib-ft (41-47 N-m). Using cylinder head pressure test kit, install fabricated blocking plates (65) and rubber gaskets to seal off ten water holes on fire deck. Secure with bolts, flat washers, and nuts from kit. Torque bolts to 50-60 Ib-ft (71-85 N-m). Attach a regulated air supply to end plate (64) and gradually apply pressure of 40 psi (276 kPa) to water jacket. 4-190