8-8 Published 11-22-2016, Control # 345-12
UNDERCARRIAGE RT9130E-2 SERVICE MANUAL
Hydraulic Pumps
Description
Front Steer
Section 2 of pump #1 provides the hydraulic flow necessary
to power the front steer cylinders and the swing drive
system. The pump is a gear type pump; the section provides
a flow of approximately 33.0 gpm (125 l/min).
Rear Steer
Section 2 of pump # 3 provides the hydraulic flow necessary
to power the rear steer cylinders, the outrigger circuit, the
front and rear pairs of outrigger box pin cylinders, and the
rear axle oscillation lockout system. The pump is a gear type
pump; the section provides a flow of approximately 16.5 gpm
(62.5 l/min).
Front Steering Control Valve
Description
The steering control valve is located under the dash and is
actuated by a conventional steering wheel and steering
column, providing precise, full hydraulic steering. Precise
steering is accomplished by a metering system within the
valve that is directly connected to the steering column and
wheel.
Maintenance
Removal
1. Thoroughly clean the steering control valve and the
surrounding area before removing the hydraulic hoses
from the valve.
2. Tag and disconnect the five hydraulic hoses from the
steering control valve. Cap or plug each hose and the
five ports of the valve.
3. Remove the capscrews, lockwashers, and flat washers
securing the valve to the bracket and the steering
column. Remove the control valve, leaving the steering
column in the cab.
Installation
1. Position the control valve to the bracket and steering
column and install the flat washers, lockwashers, and
capscrews. Tighten the capscrews.
2. Connect the five hydraulic hoses to the control valve as
tagged during removal.
3. Start the engine and check for proper operation and any
leakage.
Integrated Outrigger/Rear Steer Control
Valve
Description
The integrated outrigger/rear steer valve directionally
controls the outrigger circuit, outrigger pin circuit, and the
rear steer circuit. The valve is mounted on the rear of the
carrier frame front cross member.
The inlet section of the valve contains two solenoid valves
and two relief valves. The solenoid valve is normally open,
bypassing oil to the reservoir. Operation of either system
energizes the solenoid valve to close it and route oil to the
applicable circuit.
The valve also contains four three position four-way solenoid
valves that control the following:
• The rear steer solenoid valve is controlled by the Rear
Steer switch in the operator’s cab through port AST and
BST of the valve.
• The removal pin solenoid valve for the front outrigger
box is controlled by the Pin Unlock switch in the
outrigger control box in front of the left front fender
through ports A1 and B1 of the valve.
• The removal pin solenoid for the rear outrigger box is
controlled by the Pin Unlock switch in the outrigger
control box behind the right rear fender through ports A2
and B2 of the valve.
• The outrigger section solenoid valve is controlled by the
Extend/Retract switch in the operator’s cab through
ports A and B of the valve.
The valve also contains double pilot operated check valves
in the rear steer and outrigger lines.
Maintenance
Removal
1. Tag and disconnect the electrical connectors to the
integral outrigger/rear steer valve.
2. Tag and disconnect the hydraulic lines to the integrated
outrigger/rear steer valve. Cap or plug the lines and
ports.
3. Remove the capscrews, nuts and washers securing the
integrated outrigger/rear steer valve to the carrier frame.
Remove the valve as a complete assembly.
Installation
1. Position the integrated outrigger/rear steer valve on the
frame. Secure the valve with the capscrews, nuts and
washers. Tighten the capscrews.
2. Connect the hydraulic lines to the integrated outrigger/
rear steer valve as tagged during removal.
To Next Page
Loading...
Need help?
General
