Manitowoc National Crane 1300A Service And Maintenance Manual

National Crane 01-22-2019 Control # 051-08 2-1
1300A HYDRAULIC SYSTEM
2
SECTION 2
HYDRAULIC SYSTEM
SECTION CONTENTS
Hydraulic System 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
Maintenance Records. . . . . . . . . . . . . . . . . . . . . . 2-6
Hydraulic Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Pressure Setting Procedures . . . . . . . . . . . . . . . 2-11
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Relief Valve Setting Procedure . . . . . . . . . . . . . . 2-12
Hoist and Pump Section P1 Relief . . . . . . . . . . . 2-12
Pump Section P2 Relief for Lift and Telescope . 2-12
Telescope In and Telescope Out Reliefs . . . . . . 2-12
Swing, Outriggers, and Pump Section P3. . . . . . 2-13
Swing, Outriggers, and Pump Section P3
Alternate Method . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Single Front Outrigger (SFO). . . . . . . . . . . . . . . . 2-13
Supply Pressure and Return Circuit . . . . . . . . . . 2-14
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Hydraulic Reservoir, Filter, and Oil Cooler . . . . . 2-14
Hydraulic Filter Replacement. . . . . . . . . . . . . . . . 2-15
Hydraulic Oil Cooler. . . . . . . . . . . . . . . . . . . . . . . 2-15
Mesh Filter Screen. . . . . . . . . . . . . . . . . . . . . . . . 2-16
Hydraulic Valves . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Directional Control Valve . . . . . . . . . . . . . . . . . . . 2-16
RCL Lockout Valves . . . . . . . . . . . . . . . . . . . . . . 2-17
Hydraulic Remote Controllers . . . . . . . . . . . . . . . 2-17
Outrigger Manifolds . . . . . . . . . . . . . . . . . . . . . . . 2-17
Holding Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Swing Gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Crane Function Power Switch . . . . . . . . . . . . . . . 2-17
Hydraulic Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Initial Pump Installation . . . . . . . . . . . . . . . . . . . . 2-18
Oil Cooler Service & Maintenance . . . . . . . . . . . . 2-19
Trouble Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
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 circuit, pumps, valves, and cylinders. Detailed
descriptions and operation of individual hydraulic circuits are
discussed within their individual sections as applicable. A
chart titled Hydraulic Symbols contains all hydraulic symbols
used in the hydraulic schematics contained in this manual.

Manitowoc National Crane 1300A Specifications

General

Brand	Manitowoc
Model	National Crane 1300A
Category	Construction Equipment
Language	English