TM 9-2320-289-343-34. REAR MAIN SEAL REPLACEMENT (Con’t).b.CLEANING AND INSPECTION1. Wipe oil from rear main seal grooves in engine bloc and rear main bbearing cap (1). Removeall rear main seal material from mating surfaces.WARNINGCarburetor cleaning compound is highly flammable. Keep away from openflame. Failure to follow this warning may result in serious injury or death topersonnel.2.Using carburetor cleaning compound, clean rear main bearing cap (1), rear main sealgrooves, and surface of engine block that mates with rear main bearing cap.3.Check rear main bearing clearance. (See paragraph 3-1 4)c.INSTALLATION 1. Loosen inner bolts and outer bolts ofall main bearing caps 2 turns andallow crankshaft (4) to drop.2. Manufacture oil seal installation toolfrom 0.004 in. (0,102 mm) shimstock as shown.3. Apply lubricating oil to crankshaft (4) journal and rear main seal lips where they contactcrankshaft.NOTEEnsure that rear main seal halves (5 and 6) are installed with word“OUTSIDE” facing toward rear of engine block (7).4. Position lip of oil seal installation tool where upper rear main seal half (6) will enter engine block(7) .TA507123-111
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