Grove
Published 01-14-2021 Control # 707-01
2-41
TMS9000-2 SERVICE MANUAL
HYDRAULIC SYSTEM
2
11.
Pressurize and cycle the cylinder with hydraulic oil
pressure. Test the cylinder at 4500 psi (31,026 kPa).
Check for proper operation and any leakage. Make
repairs as needed.
CENTER FRONT STABILIZER CYLINDER
Description
The center front jack cylinder (Figure 2-24) has a 8.9 cm
(3.5 inch) bore and is double acting. A port block is welded to
the end of the cylinder rod and a pilot operated check valve is
threaded into the port block. Internal seals are used to
prevent leaks and a wiper ring in the cylinder head wipes dirt
from the rod as it is retracted.
The cylinder has a retracted length of 115.6 cm (45.5 in) and
an extended length of 179.1 cm (70.5 in) from the center of
the mounting fixture to the end of the ball on the barrel. The
cylinder weighs approximately 42.5 kg (113.8 lb) dry.
Maintenance
Disassembly
NOTE:
Any maintenance requiring disassembly of the
cylinders should include replacement of all seals
and rings. A seal kit will supply the required items.
1.
Remove all dirt, grease and other contaminants from
around the ports and the head.
2.
Retract the cylinder fully to avoid damaging the rod
during removal.
3.
Support the base of the cylinder to avoid sudden
extension. Secure cylinder in work area with clamps or a
chain vise to prevent rolling.
NOTE:
Excessive wear due to side load or binding is a
possibility. Mark or note the piston and head
relationship to the rod and barrel.
4.
Position the rod mount with the ports facing down. Use a
means of collecting the oil, remove the port plugs and
the check valve and allow cylinder to drain.
5.
Support the rod with a hoist sling and pull the rod to full
extension to remove additional oil. Keeping the rod
supported, tap the rod back in 25 mm (1 in) after all oil
has drained.
6.
Place protective padding around the rod near the head
to prevent damaging the chrome during head removal.
7.
Insert a spanner wrench into the holes provided and turn
the head counter clockwise to remove. If the head is
difficult to remove, tap the head with a plastic mallet
while turning.
8.
With the rod still supported, gently pull the piston from
the barrel being careful not to damage the internal
threads. Place the rod on a surface that will not damage
the chrome.
9.
Remove the setscrews located near the top of the
piston.
10.
Insert a spanner wrench into the holes on the face side
of the piston.
11.
Turn the piston counter clockwise to remove.
WARNING
Death or Injury Could Occur!
Do not use air pressure to remove the rod. Cylinder parts
could fly apart with explosive force. Use only a source of
controlled hydraulic oil pressure if the rod is hard to move.
CAUTION
Damage Could Occur!
Exercise extreme care when handling or setting down the
rod. Damage to the rod surface may cause unnecessary
maintenance and expense.
Fo
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Reference
Only
