4-7.5.3 Removing Motor and Drive Assembly (Figure 4-21H).a.Remove the four capscrews (25), nuts (26), and lockwashers (27) to remove the coupling guard (28). Disconnectthe flexible coupling (29). To remove the electric motor (32), first remove the four capscrews (30) andlockwashers (31).b.Remove the spacer bar (35) and block (36) from the drip pan by removing the capscrews (33, 34) andlockwashers (31). Finally separate the assembled lubricator from the drip pan (42) by removing four capscrews(40), flat washers (41), nuts (38), and lockwashers (39). Blank covers (43) need not be removed unless accessto reservoir is required.c.Loosen a set screw (57) from the coupling (74). Then remove four capscrews (45) and lockwashers (46) andremove the drive housing and gasket (71) from the reservoir.4-7.5.4 Disassembling Drive Assembly (Figure 4-21 H).a.Before disassembling the drive assembly, remove the outside woodruff key (55) from the idler shaft. Remove apipe plug (69) and drain the lubricant from the housing.b.Begin disassembly by unscrewing four capscrews (45) and lockwashers (46) to remove the housing cover (47)and gasket (48). Remove the oil seal (49). Withdraw the assembled drive shaft (56) and the idler shaft (61)from the housing. Remove the other oil seal (49) from the housing.c.Remove the spacer (50) from the shaft and then remove the retaining ring (51). Remove the thrust bearing (53)and thrust washer (54) from either side of the worm gear; then remove the worm gear (52) and woodruff keys(55) from the drive shaft (52).d.Loosen the set screw (57) in the spacer (58) and slide the spacer off the shaft. Then remove the worm gear (59),spacer (60), and woodruff keys (55) from the idler shaft (61).e.From the top and bottom of the housing, unscrew the two end bearings (62) and remove the gaskets (63). Thenremove the assembled transfer shaft from the housing. Unscrew the lock nut (72) and, from the back end of thereservoir and camshaft, remove another end bearing (62) and gasket (63). Then remove the assembledcamshaft from the housing. Disassemble thrust bearing (53) and washer (54), spacers (64 and 66), worm gears(65 and 67), and woodruff keys (55) from the transfer shaft (68). Remove the bearing cap (73), loosen the setscrew (57), and remove the coupling (74) from the camshaft. Remove the pipe plugs (69) from the housing (70).f.Note the position of the cams on the shaft for reassembly. Loosen set screws (75) and remove the cams (76)and woodruff keys (77) from the camshaft (78).4-96
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