Manitowoc Grove TMS9000-2 Series, Руководство по обслуживанию

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Grove
Published 01-14-2021 Control # 707-01
2-19
TMS9000-2 SERVICE MANUAL HYDRAULIC SYSTEM
2
OUTRIGGER SELECTOR-A/C MANIFOLD
VALVE
Description
The outrigger selector / A/C manifold (Figure 2-11)
directionally controls the outrigger and air conditioning
circuits. The valve is mounted on the rear face of the carrier
frame member forward of the swivel.
The valve inlet contains a pilot operated pressure reducing
valve with the pressure in the neutral position limited to
approximately 120 psi via the bias spring. The pilot pressure
supplied to this reducing valve is controlled by a solenoid
operated proportional pressure relief valve. As current is
increased to this relief valve the pressure allowed
downstream of the reducing valve is increased.
The outrigger circuit contains two three position closed
center four way valves. One is solenoid operated and
controls the pilot supply to the other which is pilot operated.
Activation of the outriggers will energize the solenoid
operated relief valve and the solenoid operated four way
sending a load sense pressure to the pump allowing it to
supply flow to the circuit. This allows movement of the
desired outrigger function while limiting the pressure based
on the function selected. See the pressure setting procedure
for specific pressures.
The A/C circuit contains a pressure reducing valve and two
position two way flow control valve. The pressure reducing
valve protects the A/C circuit in the event that a high
pressure outrigger function is activated while the A/C circuit
is also on. Activation of the A/C will energize the solenoid
operated relief valve and the solenoid operated two way flow
control sending a load sense pressure to the pump allowing
it to supply flow to the circuit. This allows a controlled amount
of flow through the two way valve at the desired pressure
controlled by the inlet pressure reducing valve.
Maintenance
Removal
1. Tag and disconnect the electrical connectors to the
outrigger selector valve.
2. Tag and disconnect the hydraulic lines to the integrated
outrigger valve. Cap or plug the lines and ports.
3. Remove the capscrews, washers and nuts securing the
outrigger selector valve to the frame. Remove the valve.
Installation
1. Install the outrigger selector valve to the frame. Secure
the valve with the washers, nuts and capscrews. Torque
the capscrews. Refer to
Torque Values
, page 1-9.
2. Connect the hydraulic lines to the outrigger valve as
tagged during removal.
3. Connect the electrical connectors to the outrigger
selector valve as tagged during removal.
Functional Check
Cycle an outrigger cylinder several times. Verify the cylinder
extends and retracts properly.
Fo
r
Reference
Only