Hyundai R125LCR-9A Crawler Excavator service manual

Hyundai R125LCR-9A Crawler Excavator - Factory Service Manual

This is Hyundai's factory service manual for the R125LCR-9A crawler excavator, as a PDF. It runs to 533 pages in 9 sections: the same workshop manual Hyundai dealers use.

It covers the Hyundai R125LCR-9A excavator.

The R125LCR-9A at a glance

These figures are taken from the specifications section of this manual.

About the Hyundai R125LCR-9A excavator

Crawler and wheeled excavators depend on their hydraulic system: the main pump, the control valve, the swing and travel motors and the cylinders. Setting pressures correctly and finding a fault in that circuit needs the factory specifications.

What is inside, section by section

Its chapters cover the engine, the fuel system, the hydraulic system, the electrical system, the undercarriage, swing and travel, the work equipment, specifications and troubleshooting and fault codes.

• General (24 pages) - safety hints, specifications.
• Structure and function (84 pages) - pump device, main control valve, swing device, travel device, RCV lever, RCV pedal.
• Hydraulic system (33 pages) - hydraulic circuit, main circuit, pilot circuit, single operation, combined operation.
• Electrical system (52 pages) - component location, electric circuit, electrical component specification, connectors.
• Mechatronics system (56 pages) - outline, mode selection system, automatic deceleration system, power boost system, travel speed control system, automatic warming up system, engine overheat prevention system, variable power control system, attachment flow control system, anti-restart system, self-diagnostic system, engine control system, EPPR valve, monitoring system, fuel warmer system.
• Troubleshooting (70 pages) - before troubleshooting, hydraulic and mechanical system, electrical system, mechatronics system.
• Maintenance standard (35 pages) - operational performance test, major components, track and work equipment.
• Disassembly and assembly (164 pages) - precaution, tightening torque, pump device, main control valver, swing device, travel device, RCV lever, turning joint, boom, arm and bucket cylinder, undercarriage, work equipment.
• Component mounting torque (15 pages) - introduction guide, engine system, electric system, hydraulic system, undercarriage, structure, work equipment.

What you can do with it

• Find the cause of a fault before replacing parts
• Remove, overhaul and refit major components
• Set pressures, clearances and adjustments to the factory values
• Use the right torque values and tightening sequences
• Read the wiring and hydraulic diagrams when tracing a problem

Who uses it

Owners and fleet mechanics who diagnose hydraulic or electrical faults on the R125LCR-9A, check wear against Hyundai's limits, or overhaul its pump, valves, swing and travel devices.

Make sure it is your model

This manual is for the R125LCR-9A. The R1250-9 has a separate manual. Check the model plate on your machine before ordering.

Questions about this manual

Which machines does this manual cover?
The Hyundai R125LCR-9A. If your machine has a different model number, look for the manual for that model.

Is it the original manufacturer manual?
Yes. It is Hyundai's own service manual, not a third-party reprint or a summary.

How many pages does it have?
533 pages, in 9 parts listed above.

How do I receive it?
It is a PDF. After payment it is available to download from your account, and you can read it on a computer, tablet or phone or print the pages you need. No printed book is shipped.