TM 9-2320-361-34 15-40. VERTICAL LEVELING WORM GEAR MAINTENANCE (Contd) b. Disassembly 1. Remove two lubrication fittings (8) from shaft (6). 2. Remove two screws (2), lockwashers (3), and setscrews (1) and (4) from housing (5) lockwashers (3). NOTE Measure and record distance shaft extends from worm gear housing. 3. Loosen worm adjusting bearing (12). Discard 4. Nine woodruff key (9) of shaft(6) with keyway of thrust washer (10). Tap square end of shaft (6) and remove sleeve bearing (7), woodruff key (9), and shaft (6) from worm gear housing (5). 5. Remove thrust washer (10), worm gear (11), and adjusting bearing (12) from worm gear housing (5). 6. Remove woodruff key (9) and sleeve bearing(7) from shaft (6). Discard woodruff key (9). c. Inspection 1. Check worm gear housing (5) for cracks or other damage. Repair by welding if cracked (TM 9-237). Replace if damaged. 2. Check all parts for small chips, burrs, and scratches. Raised metal can be removed with a fine mill file. 3. Check worm gear (11) for chipped and broken teeth. Replace if damaged. 4. Inspect adjusting bearing (12), shaft (6), sleeve bearing(7), and thrust washer (10) for wear or other damage. Refer to table 15-6, Vertical Leveling Worm Gear Wear Limits, for measurements. Replace if worm or otherwise damaged. Table 15-6. Vertical Leveling Worm Gear Wear Limits. ITEM WEAR LIMITS/TOLERANCES NO. lTEM/POiNT OF MEASUREMENT INCHES MILLIMETERS 6 Shaft (diameter) 1.371-1.372 34.82-34.85 7 Sleeve bearing Inside diameter 1.376-1.378 34.95-35.00 Outside diameter 1.999-2.000 50.77-50.80 10 Thrust washer (thickness) 0.406 10.31 12 Bearing (inside diameter) 1.376-1.378 34.95-35.00 d. Assembly 1. Install adjusting bearing (12) and worm gear (11) in worm gear housing (5). 2. Install thrust washer (10) in worm gear housing (5) so that setscrew notch faces away from worm gear (11) and keyway alines with keyway of worm gear (11). 3. Install new woodruff key (9) in shaft (6) and install shaft(6) in worm gear housing(5). 4. Set shaft (6) to extend from worm gear housing (5) as previously measured. Finger tighten adjusting bearing (12). 15-154