Skytrak 6036 Service Manual Bedienungsanleitung Seite 192

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Seitenansicht 191
Section 9 Hydraulic System
9-42
Model 6036/6036T S/N 9B0500 thru 14833
Warning
Fig. 9.21 Boom Extend Cylinder Removal
3. Remove the counterbalance valve (14, Fig.
9.22), pilot check valve (15) and related O-
rings (18) and backup rings (19) from the tube
(13).
IMPORTANT: Do not attempt to reset the extend
cylinder counterbalance valve cartridge. If re-
placement is necessary, replace the cartridge with
a new one.
4. Using a pin spanner wrench, unscrew the
gland (12, Fig. 9.22) from the tube (13).
IMPORTANT: Protect the finish on the rod at
all times. Damage to the surface of the rod can
cause premature seal failure.
5. Pull the rod and piston assembly straight out
of the tube.
IMPORTANT: When sliding the rod and piston
assembly out of the tube, be careful so that gland
threads in the tube do not damage the piston (5).
Keep the rod in line with the tube barrel to prevent
binding.
6. Remove piston seal (4) from the piston.
NOTE: It may be necessary to apply heat to
break the bond of the sealant between piston (5),
setscrew (6) and rod (1) before the piston can be
removed. Refer to paragraph 9.5.a.
7. Remove setscrew (7) and nylon setscrew (6)
securing piston (5) in place on rod (1).
8. Unscrew the piston from rod. Remove O-ring
(8) from inside of the piston.
9. Slide stop tube (9) and gland (12) from the
rod.
10. Remove O-ring (10), backup ring (11), wiper
(2), rod seal (3), and step seal (17) from the
gland.
11. If necessary, remove the plugs (16) from
bottom inside of the tube (13)
ANTI-BUCKLE BAR
ROD
END PIN
BASE END
PIN
EXTEND
CYLINDER
MA0521
9.5.4 Boom Extend Cylinder
Before you disassemble the boom extend cylinder
as described in paragraphs 9.5.5 and 9.5.6, you
must identify the cylinder by manufacturer’s
stamping at the base of the cylinder. Refer to Fig.
9.22 and 9.23.
4. Disconnect the hydraulic lines from the extend
cylinder and cap or plug open connections.
5. Support the extend cylinder with a sling or
other suitable device.
6. Remove the rod end pin and retaining rings
attaching the rod end of the extend cylinder to
the intermediate boom.
7. Remove the base end pin and retaining rings
securing the base end of the cylinder to the
outer boom.
8. Remove the cylinder from the forklift using a
strap sling and hoist or other suitable equip-
ment.
9.5.5 “TJB” Boom Extend Cylinder
a. Disassembly
1. Remove all dirt and grease from the cylinder.
2. Fasten the cylinder in a soft-jawed vise or
other acceptable holding equipment. Do not
damage the tube.
Wait for the hydraulic fluid to cool before servic-
ing any hydraulic component. Hot hydraulic fluid
can cause severe burns.
Warning
Relieve hydraulic pressure before servicing any
hydraulic component. Escaping hydraulic fluid
under pressure can penetrate the skin causing
serious injury.
a. Removal
1. Retract the boom and support it in a horizontal
and level position with blocking.
2. Engage the park lock, place the travel select
lever in neutral, and stop the engine.
3. Operate the hydraulic controls after the engine
has stopped to relieve any trapped pressure.
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