8-34 Published 11-22-2016, Control # 345-12
UNDERCARRIAGE RT9130E-2 SERVICE MANUAL
Removal
1. Extend the outrigger beam slightly for improved access
to the jack cylinder; shut down the engine.
2. Tag and disconnect the hydraulic hoses from the jack
cylinder. 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.
5. Remove the cotter pins securing the cylinder retaining
pin and remove the cylinder retaining pin and cylinder
cap retaining bracket.
6. Jack the jack cylinder up just enough to insert the
retaining pin back into the cylinder. Insert the retaining
pin into the lugs on the cylinder and secure the pin in
place with the 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 the tube on the beam assembly.
Installation
1. Apply grease (EP-MPG) to the inside diameter of the
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 the lifting device from
the cylinder.
4. Remove the retaining pin and cotter pins from the
cylinder.
5. Lower the jack until the holes in the cylinder rod align
with the holes in the outrigger beam.
6. Apply anti-seize compound to the retaining pin. Secure
the cylinder and cylinder cap retaining bracket to the
support tube with the retaining pin and cotter pins.
7. Install the 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 no jack cylinder hose will be
trapped by full outrigger beam retraction.
Functional Check
1. Activate the hydraulic system.
2. Observe the operation of the jack cylinder. If hydraulic
lines are reversed, stop immediately and connect lines
properly per instructions. Verify no jack cylinder hose is
trapped 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.
Outrigger Control Valves
Description
There are four valve assemblies responsible for controlling
the outrigger system, the integrated outrigger/rear steer
valve, the front and rear outrigger control manifolds, and the
pilot operated check valves.
NOTE: For a more detailed description and maintenance
of the valves, refer to Outrigger Control Manifold,
page 2-57.
Pilot Operated Check Valve
The pilot operated check valves are located in the outrigger
jack port blocks. The check valve provides two functions; the
first function is a holding valve, the second function provides
a thermal relief of the jack.
Integrated Outrigger/Rear Steer Valve
The integrated outrigger/rear steer valve is mounted on the
rear face of the carrier frame front cross member. The
outrigger portion of the valve consists of a 4-way two position
solenoid valve. The inlet section contains the main relief
valve.
Outrigger Control Manifold
The front and rear outrigger control manifolds are located
on the respective outrigger boxes. Each manifold consists of
four 12 volt solenoid valves and an assembly mounting kit.
CAUTION
Use a nylon strap to remove the cylinder. This will ensure
the retaining pin is not damaged.
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