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Figure 6-2.  Cylinder Head Assembly - TM-10-4320-311-14_160
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TM-10-4320-311-14 Pumping Assembly Flammable Liquid Bulk Transfer 60 GPM Diesel-Engine Driven Model M2D68 Manual
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Figure 6-3.  Valve Recess - TM-10-4320-311-14_162
TM 10-4320-311-14 INSPECTION: WARNING Death  or  serious  injury  could  occur  if  compressed  air  is  directed  against  skin.    Do  not  use compressed air for cleaning or drying unless the pressure is/has been reduced to 30 PSI or less. When   working   with   compressed   air,   always   use   eye   protection   and   any   other   protective equipment. CAUTION ·    Do not confuse the intake and exhaust valve stems. ·    The  intake/exhaust  valve  guides  are  provided  with  a  valve  stem  seal.    Valve  stem  seals cannot be reused and must be replaced with new ones. ·    When inserting the intake and exhaust valve stems, apply lube oil to the valve stems. a. Clean cylinder head and valves with a clean cloth dampened with diesel fuel.  Use wire brush where necessary and dry with compressed air. b. Inspect cylinder head for cracks, corrosion, or excessive heat damage c. Inspect valve heads and valve stems for cracks, pitting, scratches, warpage, or any other damage d. Refer to Figure 6-3.  Check that each valve stem diameter is greater than 0.2126 inch (5.40 mm). e. Reinsert valves into the cylinder head and check that each valve recess is less than 0.043 inch (1.1 mm) f. Check that the inside diameter of each valve guide does not exceed 0.2197 inch (5.58 mm). g. Clean  off  carbon  deposits  on  the  valve  seats  since  carbon  buildup,  excessive  wear,  and  corrosion  can  cause compression leaks h. Replace cylinder head if any of the following conditions exist:     cylinder block contact surface is roughened or not level the valve seats are worn     the valve rocker arm cover contact surface is rough or damaged     there are cracks between the valve seats. i. Check the valve spring for flaw or corrosion j. Refer to Figure 6-4.  Check that the valve spring free length (dimension A) is more than 1.043 inches (26.5 mm). k. Check that the spring inclination (how far spring inclines to the left or right, dimension B) is less than 0.030 inch (0.76 mm). I. Check that the OD of the valve rocker arm support shaft is more than 0.4685 inch (11.90 mm). m. Check that the ID of the valve rocker arm does not exceed 0.4764 Inch (12.1 mm). 6-6

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