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TM 5-4210-220-12
4-18. PUMP, PIPING, AND VALVES - Continued
(11) Inspect head (10) and body (16) sealing surfaces for scratches, corrosion or dirt that may cause a leak.
(12) Inspect elevation bearing (15) for being worn or out of round. Check O-ring grooves for being free from
indentations or projections.
(13) Evidence of damage of any kind is cause for rejection. Replace component or assembly as required.
(14) Attach the gear segment (17) to the head (10) using two washers (19) and two setscrews (18). Tighten
setscrews firmly.
(15) Lubricate O-rings (14) using silicone grease (item 27, Appendix E) and install into elevation bearing
grooves (15).
(16) Lightly lubricate the elevation bearing (15) outside diameter and the head (10) and body (16) inside
diameters using silicone grease (item 27, Appendix E).
(17) Lift the head (10) and align the scribe mark on the gear segment (17) with the scribe mark on the
elevation shaft (20). Align the head (10) and body (16) inside diameters.
(18) Carefully slide elevation bearing (15) into body (16) and through head (10). Be sure to align the hole in
the head with the hole in the elevation bearing.
(19) Install the setscrew into the head (10). Be sure the point of the setscrew protrudes through the
elevation bearing. Tighten until snug.
(20) Install seal washer (8) and jam nut (7) onto setscrew (9) and tighten firmly.
(21) Lubricate O-ring (12) using silicone grease (item 27, Appendix E) and install into groove of end cap
(13).
(22) Install end cap (13) into body (16) and lock in place using retaining ring (11).
(23) Lift cable mounting plate assembly (6) and position on turret head (10). Insert cable end (3) into sleeve
boss (4).
(24) Install cable mounting plate capscrews (5) and tighten firmly.
(25) Install lockwasher (2) and nut (1) onto cable end rod (3) and tighten firmly.
(26) Check control cable adjustment following steps 20 thru 26 of Control Cable Repair preceding.
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