4-7.5.5 Cleaning Inspection and Repair.a.Clean all parts with an approved cleaning solvent. Check and clean any collection of dirt or sludge from thesuction strainer.b.Examine all gears for signs of wear or broken teeth. Check bearing surfaces for evidence of wear or pitting.Check shafts for wear, corrosion, pitting, or damage.c.Normally, replacement of all gaskets, packing, and oil seals is recommended each time the lubricator isdisassembled.d.Replace all parts found damaged or worn beyond normal wear.4-7.5.6 Assembling Drive Assembly (Figure 4-21 H).a.Set up the housing on its back (opening up) leaving room under the housing for idler shaft clearance. Install thespacer (66) onto the transfer shaft (68); then position the woodruff keys (55) in the slots in the shaft. From thetop end of the shaft, install worm gear (67). From the bottom end, install worm gear (65). Then install spacers(64) and thrust bearing (53) and washer (54) onto each end of the shaft. Position the assembled transfer shaft inthe housing and install the gaskets (63) and end bearings (62).b.Install the woodruff key (55) in the slot in the shaft (61). Install the worm gear (59); then install spacers (60) and(58). Fasten the set screw (57) to hold the spacer and worm gear in position on the shaft. Install a new oil. seal(49) into the back of the housing in the idler shaft hole. Now position the idler shaft in the housing and, from theback of the housing, insert the other woodruff key (55).c.Install a new oil seal (49) into the cover (47) in the drive shaft hole. Install a woodruff key (55) in the slot nearthe middle of the drive shaft (56); then install the worm gear (52). Onto both ends of the shaft, assemble a thrustbearing (53) and thrust washer (54). On the back end of the shaft, install the retaining ring (51) and the endspacer (50). Now position the assembled drive shaft in the housing. Apply some light lubricant on a new gasket(48); the lubricant will hold the gasket correctly positioned on the housing.d.Before attaching the cover, be sure all worm gears are properly meshed together. Then, carefully, aline the idlerand drive shafts while installing the cover (47). Be sure the gasket remains properly positioned (observe thescrew holes in the gasket through the screw holes in the cover). Finally, install the four capscrews (45) andlockwashers (46) to secure the cover to the housing.e.Apply a light lubricant to hold the new gasket (71) to the reservoir and assemble the drive assembly housing (70)onto the reservoir (79), fastening it with the four capscrews (45) and lockwashers (46).f.Install the woodruff keys (77) and the cams (76) onto the shaft (78) being sure to position the cams as they were.Tighten set screws (75). Install the end bearing (62) and gasket (63) and fasten it with the lock nut (72).Assemble the thrust washer (54) onto the shaft. Install one end of the coupling (74) on the shaft. Position theassembled cam shaft in place and slide the coupling onto the idler shaft, aligning its keyways. Fasten thecoupling to both shafts with set screws (57).4-97
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