8-20 Published 11-22-2016, Control # 345-12
UNDERCARRIAGE RT9130E-2 SERVICE MANUAL
5. Connect the hydraulic brake line to the inlet fitting.
6. Bleed the brake system.
7. Apply and release the brakes three times to ensure the
caliper operates correctly. Check for fluid leaks. Ensure
the linings move freely.
Linings
1. Install the linings in the caliper housing with the metal
backing against the piston and not toward the disc.
2. Position the end plates on the housing and secure with
bolts. Apply Loctite 271 or equivalent to the bolt threads.
3. Ensure the linings move freely in the housing.
4. Bleed the brake system.
5. Apply and release the brakes three times to ensure the
caliper operates correctly. Check for fluid leaks. Ensure
the linings move freely.
Parking Brake Actuator
Description
The spring-applied, hydraulically-released parking brake
actuators are located on the front axle and are used to apply
and release the parking brake.
Maintenance
Removal
1. Chock the wheels to prevent crane movement.
2. Start the engine, ensure the transmission is in neutral,
and position the Park Brake Switch to OFF. This will
pressurize the brake actuator to release the brake.
Engine must remain running. Air pressure of 170 to 270
psi (1172 to 1862 kPa) may be used to pressurize the
actuator.
3. Remove the washer and nut securing the brake actuator
rod ball joint to the brake linkage lever.
4. Remove the nuts, washers, and lockwashers securing
the brake actuator to the mounting bracket and tilt the
actuator so the ball joint will clear the linkage lever bolt.
5. Position the Park Brake Switch to ON and shut down the
engine.
6. Disconnect the hydraulic line from the brake actuator,
then cap or plug all openings.
Installation
1. Connect the hydraulic line to the brake actuator.
2. Start the engine, ensure the transmission is in neutral,
and position the Park Brake Switch to OFF. This will
pressurize the brake actuator to release the brake.
Engine must remain running. Air pressure of 170 to 270
psi (1172 to 1862 kPa) may be used to pressurize the
actuator.
3. It will be necessary to tilt the actuator so the ball joint will
clear the linkage lever bolt. Position the brake actuator
on the mounting bracket and secure in place with the
attaching nuts, washers, and lockwashers.
4. Secure the brake actuator rod ball joint to the brake
linkage lever with the washer and nut.
5. Position the Park Brake Switch to ON and shut down the
engine.
Adjustment
1. Chock the wheels to prevent crane movement.
2. Start the engine, ensure the transmission is in neutral,
and position the Park Brake Switch to OFF. This will
pressurize the brake actuator to release the tension on
the brake linkage. Air pressure of 170 to 270 psi (1172 to
1862 kPa) may be used to pressurize the actuator.
Screw the caging nut up under the actuator chamber.
3. Install the rod ball joint until the ball joint will just connect
to the brake linkage with the brake lever in a horizontal
position.
4. Lock the rod ball joint with the jam nut and back off the
caging nut.
5. Position the Park Brake Switch to ON and shut down the
engine.
Parking Brake
Description
The parking brake is mounted on the front axle. The brake is
a disc-type brake that is controlled by a switch on the front
console in the cab and is spring-applied and hydraulically
released by an actuator.
CAUTION
Always replace both linings. If only one lining is replaced,
possible disc damage can occur.
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