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Disassembly -706880631
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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 -706880633
TM 5-4210-233-14&P-1
4-200. AERIAL DISCHARGE VALVE PNEUMATIC ACTUATOR - Continued
(8) Remove center split spacer (13).
(9) Remove spring clip (14) and retaining washer (15).
(10) Tap shaft downward and remove. Take care to proect actuator bore from possible damage from
t
lower pinion gear teeth. As drive shaft (1 0) is being withdrawn, the internal components can be
removed in sequence. Upper spacer (16), upper pinion gear (17), lower pinion gear (18), lower
spacer (19) and keys (20).
(11) Remove spring clip (21) and retaining washer (22) from drive shaft (10).
(12) Remove two bearings (23) from actuator body (24). Remove and discard four O-rings (25 and
26).
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 metal parts in dry cleaning solvent (Item 3, Appendix E).
WARNING
Death or serious injury could occur if compressed air is
directed against the skin. Do not use compressed air for
cleaning or drying unless the pressure is/has been reduced
2
to 30 psi (2.11 kg/cm ) or less. When working with com-
pressed air, always use chip guards, eye protection, and other
personal protective equipment.
(2) Dry all parts with compressed air.
(3) Inspect pistons (11) for scoring. Inspect teeth on pistons (11) for damage. Replace pistons as
necessary.
(4) Inspect pinion gears (17 and 18) for damage. Replace as necessary.
(5) Inspect piston bores and drive shaft bore in actuatorbody (24) for scoring.
(6) Inspect all other parts for damage. Replace parts as necessary.
4-503

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