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AERIAL DISCHARGE VALVE -706880371
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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Assembly -706880373
TM 5-4210-233-14&P-1
4-47. AERIAL DISCHARGE VALVE - Continued
(3) Remove center roll pin from universal joint (5).
(4) Remove sixteen nuts (6) and sixteen screws (7).
(5) Lift and support aerial waterway (8). Remove valve (9) and gaskets (10). Discard gaskets.
b. Disassembly.
(1) Mark position of sector (12). Drive out roll pin (11) from hub of sector (12)
(2) Lift sector (12) off stem of ball (13).
(3) Remove rack (14) from bracket (15).
(4) Remove four screws (16).
(5) Lift bracket (15) off dowel pins (17).
(6) Remove four screws (18) attaching seal housing (19) to valve body (9).
(7) Remove seal housing (19) from valve body (9). Seal (20) should come out with housing (19).
(8) Remove seal (20), four springs (21) and O-rings (22 and 23) from housing (19). Discard seal,
springs and O-rings.
(9) Remove four screws (24) and cover (25).
(10) Use a spanner wrench to remove bearing retainers (26) from valve body (9); 1/4"-20 apped
t
puller holes are provided. Ball bearings (27) will come off ball trunnions with the retainers (26).
(11) Ball (13) can be removed through large opening of body by lifting it upward and pulling the short
trunnion out first.
(12) Remove ball bearings (27) from retainers (26).
(13) Remove O-rings (28 and 29) from bearing retainers (26). Discard O-rings.
c. Cleaning and Inspection.
WARNING
Dry cleaning solvent P-D-680 is potentially dangerous.
Avoid repeated and prolonged breathing of vapors and
skin contact with the liquid. Do not use near open flame,
arcing equipment or other ignition sources. Always wear
eye protection and protective clothing. The flash point of
P-D-680 is 100 to 138 deg. F (38 to 59 deg. C).
(1) Clean all parts in dry cleaning solvent (Item 3, Appendix E).
4-243

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