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Dealer Service 29
MAN0450 (10/28/2005)
Disassemble
Remove snap ring (3) from end of barrel. Slide rod
assembly out of barrel. Inspect inside of cylinder barrel
and rod surface for any scratches or scouring. Small
scratches can be removed with fine crocus cloth. If
scratches cannot be repaired, replace entire cylinder.
Clamp cross pin end of rod assembly in vise. Remove
nut (5). Remove piston (1) and rod guide (2) from rod
assembly. Clean threads on rod assembly and nut.
Remove and discard all seals, wipers and O-rings.
Assemble
Lubricate new seals with clean oil. Install O-ring (D)
and backup washer (C) in the outer groove of rod guide
(2). Note the position of the backup ring. Install rod seal
(E) in inner groove of rod guide. Note that the lips of the
seal should be toward the piston side of the guide.
Install wiper (F) with lip pointed outward from rod guide.
Slide rod guide onto rod (6).
Install seal (A) onto outer groove of piston. Apply oil to
threads on rod assembly. Slide O-ring (4) over threads.
Install piston. Apply Loctite primer 7649 and removable
thread lock 242 to end of rod. Torque nut (5) to 150-180
lbs-ft.
Lubricate seals, slide rod assembly into tube and install
snap ring (3) to complete assembly.
Swing Cylinder
Figure 19. Swing Cylinder
Disassemble
Check for style of rod guide and follow instructions in
corresponding section. Slide rod assembly out of bar-
rel. Inspect inside of cylinder barrel and rod surface for
any scratches or scouring. Small scratches can be
removed with fine crocus cloth. If scratches cannot be
repaired, replace entire cylinder.
Clamp cross pin end of rod assembly in vise. Remove
piston (1) from end of rod (4) using a spanner wrench.
Slide rod guide (2) from rod. Clean threads on rod
assembly and piston. Remove iron ring (A) from piston.
Remove and discard all seals, wipers and O-rings.
Assemble
Lubricate O-rings and seals with clean hydraulic fluid.
Install O-ring (D) and back-up (C) in exterior groove of
rod guide (2). Note the position of the backup washer
and O-ring. Install seal (E) and wiper (F) into inner
grooves of rod guide with open portion of V-groove
toward piston.
Slide rod guide assembly (2) onto rod (4). Place iron
ring (A) in outer groove of piston. Install piston seal (B)
in outer groove of piston.
Apply Loctite primer 7649 and removable thread lock
242 to threads on end of rod (4). Install piston (1) onto
rod and tighten with a spanner wrench. Torque to 150-
175 lbs-ft.
Compress iron ring and piston seal and carefully insert
piston and rod assembly into barrel. Use care to pre-
vent damage while installing.
Carefully push or tap rod guide (2) into barrel just past
groove inside barrel. Secure rod guide as shown for
the corresponding style.
1. Piston
2. Rod guide
3. Snap ring
4. Rod
A. Iron ring
B. Piston seal
C. Backup washer
D. O-ring
E. Rod seal
F. Wiper
(Rev. 8/5/2009)