2-46 Published 11-22-2016, Control # 345-12
HYDRAULIC SYSTEM RT9130E-2 SERVICE MANUAL
SWING POWER BRAKE VALVE
Description
The swing power brake valve Figure 2-26 is used to provide
hydraulic pressure to the piston of the swing brakes to apply
the brakes. The valve receives its supply of oil through the
swing brake and armrest lockout valve manifold.
Depressing the brake pedal causes hydraulic oil to flow to
the top of each brake piston where, combined with spring
tension, the total force overcomes each brake’s release
pressure and applies the brakes. When the valve is
released, excess hydraulic oil flows from the valve to the
case drain manifold and back to the reservoir.
Maintenance
Removal
1. Tag and disconnect hydraulic lines attached to the brake
valve. Cap or plug the lines and ports.
2. Remove the four bolts, lockwashers, flat washers, and
nuts which secure the brake valve to the cab floor.
Remove the brake valve.
Installation
1. Engage the swing lock.
2. Install the brake valve and secure in place with the four
bolts, flat washers, lockwashers, and nuts.
3. Attach the hydraulic lines to the brake valve as tagged
during removal.
Function Check
1. Start the engine and let it idle.
2. Disengage the swing lock.
3. Slowly swing the turntable.
4. Test the valve by engaging the swing brake control valve
and operating the swing brake. Verify the swing brake
works when the pedal is pressed. Verify the brake is off
when the pedal is not pressed. Engage the swing lock
and make adjustments to the pedal as needed.
5. Check for leaks. Make repairs as needed.
DANGER
Crushing Hazard!
Engage the swing lock before installing the swing brake
valve.
DANGER
Crushing Hazard!
Engage the swing lock before adjusting the swing brake
valve.
FIGURE 2-26
Drain To
Tank
To Swing Brake
6100
6100-1
Pressure
From
Pressure
Reducing
Sequence
Valve
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