TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 8-14. CYLINDER COMPRESSION TEST (Cent) NO FUEL 9. h. Position rocker arms (5) over pressure gage and adapter (15) and exhaust valves. Install two rocker arm shaft bolts (4) and torque to 90-100 Ib-ft (122-136 N-m). ● ● ● NOTE Do not crank engine using starter motor to obtain compression pressure. Engine must be running to obtain accurate reading. Variation in compression pressures between cylinders must not exceed 25 PSI (172 kPa) at 600 RPM. Use spare fuel line to fabricate a jumper connection between fuel inlet and return manifold connectors. Fuel line cannot be reinstalled on engine. Install spare fuel line (17) between inlet manifold (18) and return manifold (19). ● ● WARNING Avoid contact with hot manifolds, pulleys, and other moving parts to avoid personal Injury. Wear proper ear protection when running engine. Noise volume of engine can cause hearing loss or injury. Protective turbocharger air inlet shield must be Installed prior to doing maintenance when engine Is running and air Inlet has been removed. Contact with rotating blades will cause injury to personnel. CAUTION Run engine in clean area when air intake ducting is removed. Dirt, dust, and particles in unfiltered air can enter engine and damage parts or cause mechanical failure. . , 1 POSITION Y o / ‘6 11 i. Start engine and run at 600 RPM. Record pressure shown on cylinder tester gage. 8-36