Manitowoc Grove GRT9165 Service Manual

2-1
GROVE
GRT9165 SERVICE MANUAL HYDRAULIC SYSTEM
2
Published 10-01-2020 Control # 699-00
SECTION 2
HYDRAULIC SYSTEM
SECTION CONTENTS
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Hydraulic Symbols . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Hydraulic System Maintenance Precautions . . . . 2-4
Label Parts when Disassembling . . . . . . . . . . . . . 2-4
Hydraulic Oil Recommendations. . . . . . . . . . . . . . 2-4
Draining and Flushing. . . . . . . . . . . . . . . . . . . . . . 2-4
Removing Air From the Hydraulic System . . . . . . 2-5
Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Directional Control Valves. . . . . . . . . . . . . . . . . . . 2-6
Visual Inspection of Hoses and Fittings . . . . . . . . 2-7
Supply Pressure And Return Circuit . . . . . . . . . . 2-8
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Hydraulic Oil Return Filter Assembly . . . . . . . . . 2-10
Fill Cap/Breather . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Hydraulic Oil Cooler . . . . . . . . . . . . . . . . . . . . . . . 2-12
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Hydraulic Pumps . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Hydraulic Pump Distribution . . . . . . . . . . . . . . . . 2-18
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Troubleshooting Aids . . . . . . . . . . . . . . . . . . . . . 2-20
Troubleshooting Procedures. . . . . . . . . . . . . . . . 2-20
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Carrier Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Outrigger Control Manifold Valves . . . . . . . . . . . 2-23
Carrier Manifold Valve . . . . . . . . . . . . . . . . . . . . 2-25
Suspension Manifold Valve . . . . . . . . . . . . . . . . 2-28
Fan Control Manifold Valve. . . . . . . . . . . . . . . . . 2-29
Differential Lock Manifold Valve . . . . . . . . . . . . . 2-30
Bleed Off Valve . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Superstructure Valves . . . . . . . . . . . . . . . . . . . . . 2-32
Main Directional Control Valve . . . . . . . . . . . . . . 2-33
Compact Manifold Valve . . . . . . . . . . . . . . . . . . . 2-36
Accessory Manifold Valve. . . . . . . . . . . . . . . . . . 2-39
Swing Directional Control Valve . . . . . . . . . . . . . 2-43
Dual Accumulator Charger Manifold Valve . . . . . 2-45
Check Valve Assembly . . . . . . . . . . . . . . . . . . . . 2-47
Telescope Cylinder Control Valve . . . . . . . . . . . . 2-48
Lift Cylinder Manifold . . . . . . . . . . . . . . . . . . . . . . 2-50
Hydraulic Boom Extension Valve (Optional) . . . 2-51
Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
Functional Test . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
Pressure Setting Procedures . . . . . . . . . . . . . . . . 2-52
Accessing the Diagnostic Connector . . . . . . . . . . 2-54
Connecting the Manitowoc Crane
Service Tool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
Checking/Setting the Piston Pumps Cut-off
and Differential Pressures . . . . . . . . . . . . . . . . . . 2-54
Checking/Setting the Pilot Supply Pressure . . . . 2-56
Load Sense Relief (Max System Pressure). . . . . 2-59
Telescope Extend and Retract Relief
Pressures. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 2-59
Checking / Setting the Swing Brake Release
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Checking the Swing Work Pressure . . . . . . . . . . 2-61
Checking/Setting the Front Steer Pressure . . . . . 2-61
Check the Service Brake Accumulator Charging
Valve Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Service Brake Accumulators Pre-charge. . . . . . . 2-62
Checking/Setting Cab Tilt Raise and Lower
Pressures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Checking/Setting Counterweight and Hydraulic
Boom Extension Pressures . . . . . . . . . . . . . . . . . 2-63
Checking/Setting Outrigger Pressure,
Rear Steer, and Suspension Raise . . . . . . . . . . . 2-65
Suspension Raise Pressure . . . . . . . . . . . . . . . . 2-67
Checking/Setting Park Brake Pressure and
Transmission Fan Max Pressure . . . . . . . . . . . . . 2-67
Adjusting Controller Functions. . . . . . . . . . . . . . . 2-67
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Cylinder Rod Surface Protection . . . . . . . . . . . . . 2-68
Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Temperature Effects On Hydraulic Cylinders . . . 2-68

Manitowoc Grove GRT9165 Specifications

General

Brand	Manitowoc
Model	Grove GRT9165
Category	Construction Equipment
Language	English