Manitowoc Grove GRT9165, Руководство по обслуживанию

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HYDRAULIC SYSTEM GRT9165 SERVICE MANUAL
2-50 Published 10-01-2020 Control # 699-00
Lift Cylinder Manifold
The lift cylinder manifold valve (Figure 2-21) is located on the
lift cylinder. This valve features two pressure transducers
that report system pressure to the RCL for lift up and down
functions. If the transducers are replaced, the RCL must be
recalibrated.
The lift cylinder manifold valve hoses and transducers can
be disconnected, but valve manifold cannot be removed
from the lift cylinder. Contact your Grove Crane distributor or
Manitowoc Crane Care if the lift cylinder needs repair.
Removal
1. Start the engine and fully retract the telescope the lift
cylinders using the joysticks. Use the RCL override
function to fully retract the lift cylinder.
2. Raise the hydraulic boom extension to 0° offset.
3. Shut off engine.
4. Tag and remove hydraulic hoses from the hydraulic
boom extension manifold valve.
5. Tag and disconnect electrical connections.
Installation
1. Connect hydraulic hoses as tagged.
2. Connect electrical connectors as tagged.
3. Re-calibrate the transducers.
Functional Test
1. Start the engine and run it at normal speed.
2. Raise and lower the boom extension. Check for smooth
operation of cylinders and motors.
3. Check the valve and lines for leakage. Make repairs as
needed.
DANGER
Make sure the lift cylinder is full retracted before removing
the hoses and transducers. Failure to fully retract the lift
cylinder before removing hoses and transducers may
result in injury or death.
2
1
3
4
5
Telescope Cylinder Valve
1 Work Port — V1 (80 GPM)
2 Work Port — V2 (20 GPM)
3 Drain Port — DR
4
Pressure Transducer — RCL-1 —
Lift Down
5
Pressure Transducer — RCL-2 —
Lift Up
FIGURE 2-21
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