Quantcast c.  Inspection and Repair (Contd) - TM-9-2815-225-34P_163

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TM 9-2815-225-34&P 3-35.  CYLINDER HEAD AND VALVE REPAIR (Contd) LOCATION/ITEM ACTION REMARKS c.  Inspection and Repair (Contd) 18. Two injector (11)  Before starting drill press sleeves (7) (Contd) motor, insert bead cutting tool (48), pilot (49), and holder (50) in injector sleeve bore of cylinder head (9) to ensure proper alignment. (12)  Lubricate cutter (48) with Raise cutter (48) high enough cutting oil. to lubricate. CAUTION   Use extreme caution when cutting injector sleeve seat.   Do not run drill press at speeds higher than 75 rpm.  Tool chatter may occur at speeds higher than 75 rpm, damaging injector sleeve bore. NOTE Do not cut more than 0.010 in. (0.254 mm) deep into cylinder head. (13)  Turn on drill press motor When proper cut depth has and make a very light cut. been reached, allow cutter (48) to turn in position for about 10 sec- onds to ensure a good seat and clean grooves. (14)  Remove cutter (48), holder (50), and pilot (49) from drill press. (15)  Remove bead cutting tool (48) Use injector seat cutting tool from holder (50) and pilot (49), (ST-824) (51) to cut a 70 chamfer and install injector seat cutting at top edge of 60 seat.  Apply tool (51). Prussian blue compound to 60 seat to aid in determining amount of chamfer needed. (16)  Lubricate and position Lubricate cutter (51) with cutting cutter (51), holder (50), and oil. pilot (49) on seat. (17)  Rotate cutter (51) while Use tap wrench.  Remove cutter applying even pressure. (51), holder (50), and pilot (49) when lower edge of 70 relief chamfer is about 0.125 in. (3.175 mm) from top of bead. CAUTION To prevent damage to injector sleeve during installation, ensure sleeve seat is free from oil, carbon, or any other foreign material. (18)  Remove any bluing compound left on injector seat surface. 3-132


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