TM 5-3805-261-34ENGINE MAINTENANCE.(cont)3-12. RockerArmAssembly.(Sheet 12 of 13)ADJUSTMENT (cont)NOTEThe number one cylinder must be at thecompression stroke to obtain proper valveadjustment.6.Check number one cylinder for compressionstroke. Intake and exhaust valves must beclosed. This can be checked by visuallyinspecting the valves and by movement in bothrocker arms. If exhaust valve is open, remove3/8-16NC bolt and turn engine 360 degrees.7.Adjust intake valves for cylinders 1 and 2 ontop of engine. Turn adjusting screws in arms(14 and 25, Figure 3-63) until a clearance of0.012 to 0.018 inch is obtained. Securescrews with lock nuts.8.Adjust exhaust valves for cylinders 1 and 3.Turn screws in arms (9 and 30) until aclearance of 0.022 to 0.028 inch is obtainedbetween arms (9 and 30) and push rods (3).Secure screws with lock nuts.9.Remove 3/8-16NC bolt in flywheel beforeturning engine.10.Turn engine counterclockwise 360 degrees.Number 4 cylinder should now be at top centerposition. Replace 3/8 inch-16NC bolt inflywheel.Go to Sheet 133-76Figure 3-63.
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