TM 5-3805-262-34SHEET 5 OF 21(b) Check if No. 1 cylinder push rods are loose. If push rods are loose, No.1 cylinder is at TDC on compression stroke: go to step (c) below. Ifpush rods are tight, crank engine one complete revolution and aline TDCmark on crankshaft pulley with timing pointer. The No. 1 cylinder is nowat TDC on compression stroke.(c) Refer to illustration labeled “NO. 1 TDC COMPRESSION STROKE.” Locateintake and exhaust valves marked by arrows in illustration.(d) Using tappet adjustment tool and thickness gage, adjust indicated intakeand exhaust valves to the following specifications:(e)Tap Pet clearanceIntake valvesExhaust valvesLoosen valve adjusting screwuntil proper thickness gagecan be inserted between rockerarm and valve stem. Thentighten adjusting screw untilrocker arm-to-valve stemclearance is correct.Cold settingHotsetting0.015 inch0.015 inch0.025 inch0.020 inchCrank engine one complete rev-olution and aline TDC mark oncrankshaft pulley with timingpointer. No. 6 cylinder is nowat TDC on compression stroke.3-7
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