TM 9-6115-604-34NAVFAC P8-633-34d.Inspect.(1)Inspect the gear (23, Figure 7-1) for cracked, chipped, or scored teeth. Replace the gear in accordancewith step e, below, if the teeth are cracked or chipped, or scored.(2)Inspect the shaft (25) as follows:(a)Inspect the splines for cracking, chipping, or distortion.(b)Check the bushing journals for scoring, and check the outside diameter of the bushing journals.(c)Replace the shaft in accordance with step e, below, if the splines are cracked, chipped, or distorted,if the journals are scored deeper than 0.003 inch (0.08 mm), or if the journal diameter is less than1.748 inch (44.40 mm).(3)Inspect the support (29) for cracks, loose bushings (28) or evidence that the bushings have turned in theirbores. If the support is damaged, replace both the support and bushings.(4)Inspect the bushings (28) for scoring, and measure the inside diameter. Replace the bushings inaccordance with step e, below, if the bushings are scored deeper than 0.003 inch (0.08 mm), or worn largerthan 1.755 inch (44.58 mm).(5)Replace the thrust bearings (22 and 24) and the clamping washer (21) if they are visibly worn, or scoreddeeper than 0.003 inch (0.08 mm).(6)Inspect the splines in the coupling (14) for damage. If defective, replace both the coupling and the snapwire (15).e.Repair.(1)Replace worn bushings (28, Figure 7-1) using an arbor press and bushing drivers. Line bore the newbushings to an inside diameter of 1.751 to 1.754 inch (44.48 to 44.55 mm).(2)Replace the gear (23) on the shaft (25) using an arbor press. Press the replacement gear on the shaft untilit bottoms against the shaft shoulder.f.Assemble. During assembly, lubricate all parts with lubricating oil MIL-L-9000.(1)Coat the expansion plug (26, Figure 7-1) and pipe plug (27) with a light coating of sealant MIL-S-45180, orequivalent, and install them in the support (29).(2)Place the thrust bearing (24), steel side towards support (29), over the shaft (25), and position it against thegear (23). Install the shaft and gear assembly into the support (29).(3)Install the thrust bearing (22), steel side towards support (29), over the shaft (25). Install the clampingwasher (21), chamfered side towards support (29), and secure with the retaining ring (20).(4)Check the shaft end clearance using a feeler gage between the gear (23) and thrust boss on the support(29). If the clearance is not between 0.002 and 0.012 inch (0.05 and 0.30 mm), replace the thrust bearings(22 and 24).g.Install.(1)Using a new gasket (19, Figure 7-1), install the drive unit on the timing gear housing using the lockwashers(18), and capscrews (16 and 17). Tighten the capscrews to 30 to 35 pound-feet (41 to 47 newton meters).(2)Install the coupling (14) on the shaft (25).(3)Install the water pump in accordance with the Operator and Organizational Maintenance Manual.SECTION II. RADIATOR7-6. GENERAL. Coolant leaves the engine thermostat housings and enters the upper inlet tank of the radiator. Enginedriven, fan-forced air cools the coolant as it travels down through the radiator cores to the outlet tank at the bottom of theradiator. Coolant is drawn out of the radiator by the engine water pump. A sight glass on the upper radiator tank allowsvisual inspection of coolant level while the engine is running.7-5
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