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Manitowoc Grove RT770E Service Maintenance Manual

Manitowoc Grove RT770E
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HYDRAULIC SYSTEM RT770E
2-2
Published 11/26/2014, Control # 447-05
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Telescope Fill Tube Control Valve Manifold. . . . 2-56
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-56
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Hydraulic Accumulator. . . . . . . . . . . . . . . . . . . . . 2-58
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Service Brake and CAC Fan Motor Priority
Flow Control Valve . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Oil Cooler Fan Motor Priority Flow Control
Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Surface Protection For Cylinder Rods. . . . . . . . . 2-61
Temperature Effects On Hydraulic Cylinders . . . 2-62
Lift Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64
Telescope Cylinder . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Axle Oscillation Lockout Cylinder . . . . . . . . . . . . 2-69
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69
Steer Cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72
Outrigger Extension Cylinder . . . . . . . . . . . . . . . . 2-75
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-75
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-75
Outrigger Jack Cylinder . . . . . . . . . . . . . . . . . . . . 2-78
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-78
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-78
Counterweight Removal Cylinder. . . . . . . . . . . . . 2-81
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-81
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-81
DESCRIPTION
This section describes the hydraulic system, the
components which make up the hydraulic system, and the
components dependent upon the hydraulic system for their
operation. This includes descriptions of the supply pressure
and return hydraulic circuit, hydraulic pumps, all hydraulic
valves, and all hydraulic cylinders. Detailed descriptions and
operation of individual hydraulic circuits are discussed within
their individual sections as applicable. A complete hydraulic
system schematic showing all options is at the back of this
manual.

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Manitowoc Grove RT770E Specifications

General IconGeneral
BrandManitowoc
ModelGrove RT770E
CategoryConstruction Equipment
LanguageEnglish

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