8-29
GRT9165 SERVICE MANUAL
UNDERCARRIAGE
8
Published 10-01-2020 Control # 699-00
GROVE
Outrigger Jack Cylinder
Description
Four jack cylinders are used on the crane, one at the end of
each outrigger beam. The jack cylinders provide the force for
the outrigger beam’s vertical movement. The cylinder weighs
approximately 108.6 kg (239.4 lb).
Removal
1.
Slightly extend outrigger beam for improved access to
the jack cylinder. Shut down the engine.
2.
Tag and disconnect the hydraulic hoses from the jack
cylinder (see Figure 8-29). Remove the fittings from the
ports. Cap or plug all openings.
3.
Remove the cylinder cap.
4.
Place a jack capable of supporting the weight of the jack
cylinder at the base of the cylinder barrel. Jack up the
cylinder just enough to relieve any pressure on the
cylinder retaining pin.
NOTE:
Jack cylinder weighs approximately 108.6 kg
(239.4 lb).
5.
Remove the cotter pins securing the cylinder retaining
pin and remove the cylinder retaining pin and cylinder
cap retaining bracket.
6.
Using jack, raise cylinder up just enough to insert
retaining pin into cylinder. Insert retaining pin in lugs on
cylinder. Secure pin in place with cotter pins.
7.
Fasten a nylon strap onto the cylinder retaining pin and
use an adequate lifting device to lift the jack cylinder out
of tube of the beam assembly.
Installation
1.
Apply grease (EP-MPG) to ID of jack cylinder support
tube.
2.
If removed, install wear ring in groove in bottom of
support tube and in groove at top on jack cylinder.
3.
Place a jack beneath the cylinder tube on the outrigger
beam. Using the same method as described under
Removal, lower the jack cylinder into the cylinder tube
on the outrigger beam until the retaining pin is just above
the tube. Position the jack so that it will support the
cylinder in this position. Remove lifting device from
cylinder.
4.
Remove retaining pin and cotter pins from cylinder.
5.
Using the jack, lower the cylinder until holes in cylinder
rod align with holes in outrigger beam.
6.
Apply anti-seeze compound to retaining pin. Secure
cylinder and cylinder cap retaining bracket to support
tube with retaining pin and cotter pins.
7.
Install cylinder cap.
8.
Install the fittings in the cylinder ports and connect the
hoses as tagged during removal. Verify the piston side of
the jack cylinder is connected to the solenoid valve bank
to prevent damage. Verify jack cylinder hoses are not
trapped or twisted by full outrigger beam retraction.
Functional Check
1.
Activate the hydraulic system. Fully extend and retract
the jack cylinder.
2.
Observe the operation of the jack cylinder. If hydraulic
lines are reversed, stop immediately and connect lines
properly per instructions. Verify jack cylinders are not
trapped or twisted by full outrigger beam retraction. If
any is, stop immediately and install lines properly to
avoid trapping.
3.
Check the hydraulic connections and hoses for evidence
of leakage. Make repairs as needed.
CAUTION
Use a nylon strap to remove cylinder. This will ensure
retaining pin is not damaged.
Содержание Grove GRT9165
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