Sany SY155U Hydraulic Excavator Repair Manual

Excavator Model: SY155U
Documentation No.: B06T03ENAN1-SY155U
Electrical and Hydraulics Schematics is included.

Repair Manual Table of Content:

Introduction
Shop Safety
Specifications
Structure and functions
Standard Values
Testing and adjusting
Troubleshooting
Disassembly and assembly
System Schematics
How to Read the Manual
● Some attachments and optional parts in this shop manual may not be delivered to certain areas. If one of them is required, consult Sany distributors.
● Materials and specifications are subject to change without notice.
Sany SY155U Hydraulic Excavator Repair Service Manual organization
Introduction
This section provides an overview of what is covered in the rest of this manual and how to use this manual,.
Shop Safety
This section covers basic shop safety information relating to this equipment. It also describes what the hazard alerts mean that are used throughout the manual.
Specifications
Technical specification of work equipment and optional parts are given in this section.
Structure and functions

This section explains the structure and function of each component. It helps the reader to get a better understanding of the machine structure, and also serves as a reference for troubleshooting.

Standard Values

This section explains the standard values for a new machine and judgement criteria for testing, adjusting, and troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts in troubleshooting.

Testing and adjusting

This section details the inspection before and after repair work as well as the adjustment during inspection and repair work. Troubleshooting table that involves “Fault”and “Cause”are also included in this section.

Troubleshooting

This section explains the way to detect faulty parts and the method to repair them. This section is divided into the following parts: Electrical system, Engine, Hydraulic and mechanical system and Monitoring system.

Disassembly and assembly
This section explains the procedures as well as precautions for removing, installing, disassembling and assembling of each component of the SY155U.
System Schematics
This section provides hydraulic circuit diagrams and electrical circuit diagrams.