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FRONT EXTENSION/RETRACTION CYLINDER -706881030
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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REAR EXTENSION/RETRACTION CYLINDER -706881032
TM 5-4210-233-14&P-1
5-64. FRONT EXTENSION/RETRACTION CYLINDER - Continued
(3)
Remove two screws (3) securing counterbalance valve (4) to cylinder and remove O-ring (5). Discard
O-ring.
CAUTION
Avoid marring or scratching cylinder rod to prevent damage to
seal.
(4)
Using a pipe wrench unscrew rod (6) from traveling block assembly (7). Place wrench as close to
traveling block as possible when removing rod (6).
(5)
Push rod (6) into cylinder body several inches.
(6)
Remove two screws (8) and strap (9).
(7)
Remove snap ring (10) and pin (11) and remove cylinder (2).
b. Installation.
(1)
Install cylinder (2) and secure with pin (11) and snap ring (10).
(2)
Install strap (9) with screws (8).
(3)
Clean threads on rod (6) and in traveling block (7). Apply retaining compound (Item 7, Appendix E) to
threads on rod (6) and in traveling block.
CAUTION
Avoid marring or scratching cylinder rod to prevent damage to
seal.
(4)
Install rod (6) in traveling block (7). Place pipe wrench as close to traveling block as possible when
threading in rod (6).
(5)
Install new O-ring (5) and secure counterbalance vave (4) to cylinder (2) with two screws (3).
l
(6)
Install hydraulic line (1) on cylinder (2).
(7)
Extend and retract ladder several times to bleed air from system (see para 2-14).
(8)
Check for leaks and tighten fittings as necessary.
(9)
Check oil level in hydraulic oil tank. Fill tank as necessary (see para 5-48).
c.
Follow-on Maintenance.
(1)
Retract and bed ladder (see para 2-14).
5-361

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