TM 9-2320-272-24-4 - JATONKAM35s HOME ON THE WEB

TM 9-2320-272-24-45-7. CYLINDER LINERS AND BLOCK MAINTENANCE (Contd)22. Install main bearing caps (2) in engine block (1) without crank or bearing shells.23. Measure main bearing bore diameter (3) horizontally, vertically, and diagonally with telescopinggauge (4). Ensure bore diameter does not exceed 4.75 in. (120-663 mm).NOTEPipe plugs, cup plugs, and suction flange plate are installed at thistime to keep passages clean. Wrap pipe plug threads with sealingtape to prevent leakage.24. Install two cup plugs (9) in engine block (1).25. Install four pipe plugs (8) in block (1) and tighten according to table 5-6.26. Install eight pipe plugs (10) in block (1) and tighten according to table 5-6.27. Install new gasket (14) and suction flange plate (13) on engine block (1) with two newlockwashers (12) and screws (11). Tighten screws (11) 10-15 lb-ft (14-20 N•m).Table 5-6. Engine Block Pipe Plug Torque.PIPE PLUG SIZEMINIMUMLB-FT (NM1/8 in. 15 (20)1/4 in. 30 (41)3/8 in. 35 (47)1/2 in. 45 (61)3/4 in. 60 (81)1-1/4 in. 75 (102)1-1/2 in. 90 (122)MAXIMUMLB-FT (N•M)20 (27)35 (47)45 (61)55 (75)70 (95)85 (115)100 (136)NOTEMost attempts to hone or deglaze cylinder liners provide worseresults than leaving them “as is”. Experience and laboratoryresults indicate that liners do not need to be honed, rotated, ordeglazed to provide proper setting.It is recommended that cylinder liners be inspected beforecleaning so defects can be clearly noted.Inspect cylinder liners closely for any of the metal conditionsillustrated. If one liner has failed, then other liners in the sameengine are likely to have early signs of the same type of failure.28. Check cylinder liner (5) for scoring or vertical grooving (6) on the inside diameter indicating heavymetal-to-metal contact of piston to cylinder liner (5). If scoring or vertical grooving (6) is present, tagcylinder liner for replacement.29. Check cylinder liner (5) for cracks (7) indicated by magnetic detection. If cracks (7) are present, tagcylinder liner (5) for replacement.5-42