Manitowoc Grove GRT9165, Service Manual

Page: 65 / 302

2-23
GROVE
GRT9165 SERVICE MANUAL HYDRAULIC SYSTEM
2
Published 10-01-2020 Control # 699-00
Outrigger Control Manifold Valves
There are two outrigger control manifold valves (Figure 2-7)
used on the crane: one located on the front outrigger box for
controlling the front outriggers and one located on the rear
outrigger box for controlling the rear outriggers (Figure 2-6).
Each manifold valve features four normally-closed, two-
position, two-way solenoid valve assemblies, one for each
jack and extension cylinder.
Removal
1. Tag and disconnect the hydraulic lines to the solenoid
valves. Cap and plug all lines and openings.
2. Tag and disconnect the electrical connectors.
3. Remove the capscrews, hex nuts and washers securing
the manifold to the outrigger box. Remove the manifold.
Inspection
Visually inspect the valves and hydraulic connections for any
evidence of leaks or other damage. Check security of the
electrical connections. Inspect the wiring for any evidence of
cracks or breaks.
Installation
1. Position the manifold on the outrigger box and secure
with the washers, hex nuts, and capscrews. Torque
capscrews - refer to
Fasteners and Torque Values , page
1-16 for proper torque value.
2. Connect the electrical connectors to the solenoids as
marked during removal.
3. Connect the hydraulic lines to the valves as marked
during removal.
Functional Check
Activate hydraulic system and cycle affected cylinder(s)
several times. Observe for proper functioning of affected
cylinder(s). Ensure solenoid valve hydraulic connections are
secure.
FIGURE 2-7
1
2
3
4
9
5
6
7
8
8804-104
Outrigger Control Manifold
1 Control Valve - Right Front or Left Rear Jack
2
Control Valve - Right Front or Left Rear
Extension
3
Control Valve - Left Front or Right Rear
Extension
4 Control Valve - Left Front or Right Rear Jack
5 Work Port - Right Front or Left Rear Jack
6 Work Port - Right Front or Left Rear Extension
7 Work Port - Left Front or Right Rear Extension
8 Work Port - Left Front or Right Rear Jack
9 Inlet Port (IN)