TM 55-1930-209-14&P-19 Table 9-3.  Preventive Maintenance Checks and Services for Electrical Power Systems(Continued) B -  Before D -  During A -  After H -  Hourly Interval INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A H AS NECESSARY 2000 hrs 5) Using flywheel Engine Turning Tool 5P7307, turn the flywheel to close No.  1 exhaust and inlet valves, align- ing plug hole in the flywheel housing with the hole in the flywheel.  The engine is now on Number 1 Top Cen- ter Compression Stroke. 6) Install a 63.5 mm (2 1/2 in) long 9.40 mm (3/8 in) NC bolt into the flywheel through the flywheel housing. 7) Measure the lash for the valves shown in the Compression Stroke Charts.  If valve clearance is within + .003 in (0.07 mm of the clear- ance given), adjustment is not required.  If clearance is not within these limits, adjust the valves. 3306 COMPRESSION STROKE VALVES CYLINDERS INLET 1-2-4 EXHAUST 1-3-5 EXHAUST STROKE VALVES CYLINDERS INLET 3-5-6 EXHAUST 2-4-6 8) Remove the timing bolt from the fly- wheel. 9) Rotate the flywheel 360° and install the timing bolt in the flywheel. 10)  Measure the lash for the valves shown in the Exhaust Stroke Charts. 11)   Remove bolt from flywheel and install plug in flywheel housing. 12) Remove the engine turning group and install the starting motor. 13) To adjust valves, loosen the locknut on the adjusting screw. 9-22