Drott 50, 50D, D Series Crawler Excavator Service Manual S406236M2 English
Brand: CASE Construction / Drott
Product Range: Crawler Excavator
Publication Type: Service Manual
Equipment Model: 50, 50D, D Series Excavator
Serial Number: -
Publication Number: S406236M2
Issued: Printed in U.S.A. (Reprinted)
Language: English
Pages: 217
File Format: PDF Document
Additional Information: All components and systems are included, with the exception of the engine. For Engine Repair, See the Engine Service Manual.
Introduction
This manual provides instructions for maintenance and service of the DROTT 50 series "D" Crawler. All components and systems are included, with the exception of the engine which is covered in the engine manufacturer's manual supplied with each machine.
The manual is divided into six sections, preceded by a general section on safety, machine description and specifications.
A separate section entitled "Scheduled Preventive Maintenance" is provided to cover all components which require periodic maintenance. Refer to this section whenever performing normal maintenance. It includes a Maintenance Schedule, Component Capacities, Hydraulic System Operating Pressures, Maintenance Chart and Maintenance Details.
The Service section is divided into three general areas - Mechanical, Electrical and Hydraulic. Included in the Service section is general descriptive and operational information to provide a basic understanding of each system and its components. All disassembly and repair information is contained in the last section of the manual and arranged in the general sequence established in the service section, i.e. Mechanical, Electrical and Hydraulic.
Troubleshooting charts for all the systems are contained in a separate section (See Section 5). Torque Charts and Schematic Drawings of the Electrical and Hydraulic systems are located in back of this manual for easy reference when troubleshooting the machine.
Table of Contents
GENERAL
Safety Precautions
Introduction
Nomenclature and General Description
Specifications
SECTION 1 - SCHEDULED PREVENTIVE MAINTENANCE
Introduction
Hydraulic Oil Recommendations
Hydraulic System Operating Pressures
Component Capacities
Rated Pump Output
Maintenance Chart
Illustrated Listing of Grease Fittings
Itemized Maintenance Instructions
SECTION 2 - MECHANICAL SYSTEM
Undercarriage
Engine and Related Parts
Turntable Swing
Boom and Attachments
SECTION 3 - ELECTRICAL SYSTEM
Introduction
12/24 Volt System (Machines through PIN 6280344)
24 Volt System (Machines with PIN 6280345 and After)
Control Circuits
Lights and Instrumentation Circuits
SECTION 4 - HYDRAULIC SYSTEM (For pressures, see page 10)
Introduction
System Maintenance
Main Hydraulic System
General Description
Hydraulic Pump
Main Control Valves
Port Relief Valves
Explanation of "Summated" System
Power Sensing Valve
Main Relief Valves
Track Drive Hydraulics
Drive Motor Circuits
Digging Brake Release Circuit
Solenoid Control Valve
Hydraulic Swivel
Swing Hydraulics
Hoist Hydraulics
Hydraulic Circuits to Crowd Cylinder and Tool Cylinder
Leveler Hydraulics
Pilot Control System
SECTION 5 - TROUBLESHOOTING
Introduction
Engine
Undercarriage
Electrical System
Pilot Control System
Main Hydraulic System
Track Drive System
Swing System
Cylinder Circuits
Main Pump
Main Control Valves
Relief Valves
SECTION 6 - DISASSEMBLY AND REPAIR
General Cleaning Instructions
leveler Assembly
Track Chain
Track Adjustment Cylinder
Track Rollers
Idler Wheel
Digging Brake
Final Drive Transmission
Engine and Pump Drive
House Brake
Swing Gearbox
Turntable Bearing Replacement
Boom
Wiring Harness Replacement
Main Hydraulic Pump
Pilot Hydraulic Pump
Main Control Valves
Power Sensing Valve
Pilot Control (Modulator) Valves
Track Drive Motor
Swing Motor
Swing Cushion Valve
Leveler Lock Valve
Hydraulic Swivel
Hydraulic Cylinders
Hydraulic Oil Tank
Solenoid Control Valve
TORQUE CHARTS AND SCHEMATICS