Grove
Published 01-14-2021 Control # 707-01
2-25
TMS9000-2 SERVICE MANUAL
HYDRAULIC SYSTEM
2
Maintenance
Removal
Unscrew the check valve from the jack cylinder port block.
Installation
1.
Check the inside of the port block for any sharp edges or
burrs and remove as necessary with emery cloth.
2.
Install new O-rings onto the check valve.
3.
Lubricate the check valve and O-rings with clean
hydraulic oil.
NOTE:
The check valve should turn by hand until
compression of the O-rings begins.
4.
Carefully install the check valve into the port block until
fully seated. Torque to 136-149 Nm (100-110 lb-ft).
5.
Test the check valve and port block by operating the
affected outrigger’s jack cylinder. Verify it extends and
retracts without problems; verify there is no leaking.
Make repairs as needed.
WARNING
Projectile Hazard!
There must not be any load on the jack cylinder when
removing check valve to prevent the valve from becoming
a projectile.
CAUTION
Damage Could Occur!
Do not damage the O-rings during installation of the check
valve. If the check valve turns freely then gets hard to turn,
then easy to turn, remove the check valve and check the
O-rings. They have probably been damaged by a sharp
edge of a port.
1
2
3
1
2
3
6155
6155-1
FIGURE2-15
Item
Description
Item
Description
1
Port C - Cylinder
3
Port V - Valve
2
Port P - Pilot
Fo
r
Reference
Only