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ENGINE BLOCK INSPECTION AND REPLACEMENT INSTRUCTIONS (cont) - TM-5-1940-277-34_525
ENGINE BLOCK INSPECTION AND REPLACEMENT INSTRUCTIONS (cont) - TM-5-1940-277-34_527

TM-5-1940-277-34 Boat Bridge Erection Twin Jet Aluminum Hull Model USCSBMK1 (1940-01-105-5728) Manual
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TM 5-1940-277-34 ENGINE BLOCK INSPECTION AND REPLACEMENT INSTRUCTIONS (Continued) LOCATION ITEM ACTION REMARKS c. Inspect all Use 1/2 in UNC-3A threaded thread cutting holes for die if bolt cross thread- holes need ing. retapping.  Full thread depth is 1 in. (25 mm). d. Replace block if: •    Warped beyond limits •    Cracked. b. Main bearing a. Inspect cap caps (4) alinement: •    Install 7 Use 7/8 in socket main bearing and torque caps and 14 wrench (0 - 175 cap bolts, ft-lb). torque bolts to 115 - 120 ft-lb. •    Measure main Use micrometer bearing caliper, inside. bores, limit 3.1665 to 3.1673 in. •    Remove main Make sure loca- bearing caps ting tongues and install engage in loca- lower main ting grooves. bearing The center and halves into rear lower caps. bearing halves have oil grooves. •    Install Make sure loca- upper main ting tongues bearing engage in loca- halves into ting grooves. cylinder Upper bearing block. halves have oil feed hole and oil groove. 3-95







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