MAINTENANCE OF ROTARY TABLE DRIVE

TM-5-3820-256-24-1 Drilling System Manual
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4-9.8.3 Assembly. a. Position the keys (15) in the keyway on the clutch control shaft (14). Install the throwout yokes (13) on the shaft, aligning the yokes with the ears on the clutch. Install the pillow blocks (5), fastening them to the rig with nuts (1), lockwashers (2), and bolts (3). Install the brake and clutch control shaft (8) in the pillow blocks; then install the key in the shaft's keyway. Aline the handle (4) with the key and slip it onto the shaft. Fasten the handle with nut (1), lockwasher (2), and bolt (3). b. Assemble nuts (11) and adjustable yokes (10) on the tie rod (12). Do not tighten at this time. Assemble linkage between the brake arid clutch control shaft (8) and clutch control shaft (14). Install yoke pins (7) and cotter pins (6). 4-9.8.4 Adjustment and Lubrication. Check for proper clutch engagement. If the clutch does not properly engage, remove cotter and yoke pins and screw the adjustable yokes to shorten or lengthen the linkage for proper clutch engagement. When adjusted, reinstall yoke pins and cotter pins. Finally, tighten the nuts (11) against the yoke (10). Lubricate the pillow blocks to ensure the shaft turns freely inside the blocks. Also lubricate the pivot points of the clutch control shaft (14). Apply a small amount of lubricant to both levers that are pinned to the adjustable yokes (10). 4-10 MAINTENANCE OF ROTARY TABLE DRIVE 4-10.1 Fixed Displacement Motor. (Figure 4-29) 4-10.1.1 Disassembly CAUTION The end cap screws should not be loosened until the shaft seal has been removed. NOTE It is recommended that all shaft seal parts (4-9) be replaced. If parts are to be reused, they must be protected from being damaged by the shaft during removal. a. Remove the large retaining ring (2) located on the shaft end of the motor. Remove the side opposite the tangs from the groove first. b. The aluminum housing (3) is removed next. It is held in place by the friction of the O-ring (4) on its outside diameter. Pry the housing toward the end of the shaft until the O-ring is free. c. Remove the housing (3) from the shaft. This part is actually an assembly that is being held together by the friction of an internal O-ring (5). It will normally remain assembled until physically separated. 4-130

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