REPAIR RAMP HYDRAULIC CYLINDER
This task covers:
Remove (page 10-2).
Install (page 10-3).
General Mechanics Tool Kit (Item 35, App B)
External Retaining Ring Pliers
(Item 66, App B)
Internal Retaining Ring Pliers
(Item 64, App B
Automotive grease (Item 9, App C)
FRH hydraulic fluid (Item 33, App C)
Repair kit 2590-00-906-0147
Track Vehicle Repairer 63H10
see your -20
See your LO
Ramp hydraulic cylinder removed
(see your 20)
6. Remove preformed packing (11) from rod (6).
Discard preformed packing.
Fire resistant hydraulic
7. Remove cylinder head (4) from rod (6). Slide
(FRH) fluid is poisonous
cylinder head off at piston end of rod.
c a n b e a b s o r b e d
through the skin. If FRH
gets on your skin, thorough-
Seal set consists of two rod wipers and a
ly wash with soap and wa-
ter. Wash hands thoroughly prior to eat-
ing or smoking.
Remove retaining ring (1) that holds
spacer (2) in barrel (3). Push cylinder
head (4) in barrel (3). Remove spacer (2).
Discard retaining ring.
Remove retaining ring (5) that holds cylinder
head (4) in barrel (3). Remove piston rod (6),
piston (7) and cylinder head (4) as an
assembly from barrel (3). Discard retaining
Remove two packing retainers- (8) and
preformed packing (9) from piston (7).
Discard packing retainers and preformed
File piston end of rod (6) to remove staked
Remove nut (10) from piston rod (6).
Unscrew piston (7) from rod (6).
Remove retaining ring (12), backup
ring (13), and two rod wipers (14) from
cylinder head (4). Discard retaining ring,
backup ring, and rod wipers.
Remove gasket (15) and preformed
packing (16) from cylinder head (4). Discard
backup gasket and preformed packing.
Remove preformed packing (17) from
cylinder head (4). Discard preformed