Manitowoc Grove TMS700E User Manual

Grove Published 01-29-2015, Control # 512-01 2-43
TMS700E SERVICE MANUAL HYDRAULIC SYSTEM
2
SWING BRAKE AND ARMREST LOCKOUT
VALVE MANIFOLD
Description
The swing brake and armrest lockout valve manifold
(Figure 2-31) is located on the right side of the turntable. The
manifold contains a pressure reducing valve, a 100 mesh
filter screen in the inlet port, and two three-way, two position
solenoid valves.
The pressure reducing valve provides 17.2 bar (250 psi) for
operation of the swing brake.
Each solenoid valve is held in its normally open to tank
position by a spring. When the solenoid is energized, the
plunger assembly forces the spool to shift, causing the valve
to shift. De-energizing the solenoid causes spring pressure
to shift the spool to its normally closed position.
One solenoid valve serves as the swing brake release valve.
This normally open to tank valve, when de-energized,
prevents hydraulic oil pressure from releasing the swing
brake. When the swing brake switch is in OFF, this valve
opens to allow hydraulic oil pressure to release the swing
brake.
The other three-way, two-position solenoid valve serves as
the controller armrest lockout valve. This normally open to
tank valve is de-energized when the crane function switch is
in OFF, the armrest is raised, or the operator is not in the
seat. When de-energized, the valve prevents hydraulic oil
pressure from reaching the pilot circuits (the circuits swing,
lift, telescope, and each hoist remote control valve use to
control the directional control valves). When the crane
function switch is on, this valve opens to allow hydraulic oil
pressure to all of the pilot circuits, remote control valves, and
directional control valves. This valve, when closed, prevents
accidental turntable, hoist, or boom movement.
Maintenance
Removal
1. Tag and disconnect the electrical connectors to the
swing brake and armrest lockout valve manifold.
2. Tag and disconnect the hydraulic lines from the
manifold. Cap or plug the lines and ports.
3. Remove the two bolts, lockwashers, and flatwashers
securing the manifold. Remove the manifold and spacer
bushings.
Installation
1. Position the manifold and spacer bushings on turntable
and secure with two bolts, flatwashers, and
lockwashers.
2. Connect the hydraulic lines to the manifold as tagged
during removal.
3. Connect the electrical connectors to the manifold as
tagged during removal.
Functional Check - Swing Brake Release
Valve
1. Position the swing brake switch to OFF. Verify the LED in
the switch goes out.
2. Swing the turntable to verify the swing brake has
released. Step on the power brake valve to stop the
turntable.
3. Position the swing brake switch to ON. Verify the LED in
the switch comes on.
4. Activate swing and ensure the turntable will not rotate,
indicating the swing brake is on.
5. Check for leaks. Make repairs as needed.
Functional Check - Crane Function Valve
1. Turn off the crane function switch.
2. Start the engine.
3. Try to telescope the boom in and out, lower and raise the
boom, hoist each hoist up and down, and swing the
turntable left and right. Verify none of these functions
work.
4. Turn on the crane function switch, put the armrest down,
and sit in the seat.
5. Telescope the boom in and out, lower and raise the
boom, hoist each hoist up and down, and swing the
turntable left and right. Verify all of these functions work.
6. Check for leaks. Make repairs as needed.
Inlet Filter Screen Replacement
NOTE: The filter screen should be replaced every 2000
hours or sooner under severe conditions.
1. Disconnect the inlet line from the P port on the valve and
remove the fitting from the port.
2. Remove hollow lock screw, spacer, and filter screen.
3. Install new filter screen, spacer, and hollow lock screw.
4. Install fitting in the P port and connect the inlet line.
Reference Only

Manitowoc Grove TMS700E Specifications

General

Brand	Manitowoc
Model	Grove TMS700E
Category	Construction Equipment
Language	English