TM 9--2815--247--34 0009 00--2 ENGINE RUNS ROUGH OR MISFIRES AND/OR KNOCKS -- CONTINUED 0009 00 Can valve rocker arm clearance be properly adjusted? Attempt to adjust valve rocker arm clearance (WP 0014 00). no yes D Replace faulty rocker arm (WP 0077 00). Verify fault is corrected. Are exhaust valves free of wear and damage? Inspect exhaust valves for wear and damage (WP 0072 00). no yes E Replace faulty exhaust valves (WP 0072 00). Verify fault is corrected. CONTNUED FROM STEP A Are cylinders free of wear and damage? Inspect cylinders for wear and damage (WP 0061 00). no yes F Repair or replace cylin- der (WP 0061 00). Verify fault is corrected. Replace purge pump (TM 9--2350--292--20). Verify fault is corrected. END OF TASK