Hyundai HX400A L Crawler Excavator service manual

Hyundai HX400A L Crawler Excavator - Factory Service Manual

This is Hyundai's factory service manual for the HX400A L crawler excavator, as a PDF. It runs to 771 pages in 8 sections: the same workshop manual Hyundai dealers use.

It covers the Hyundai HX400A excavator.

The HX400A L at a glance

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

About the Hyundai HX400A excavator

On an excavator most repair work is hydraulic or electronic: pump and valve settings, swing and travel motors, the machine controller and its sensors. The manufacturer's manual gives the pressures, the test procedures and the torque values for that work.

What is inside, section by section

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

• General (33 pages) - safety hints, specifications.
• Structure and function (112 pages) - pump device, main control valve, swing device, travel device, RCV lever, RCV pedal.
• Hydraulic system (74 pages) - hydraulic circuit, main circuit, pilot circuit, single operation, combined operation.
• Electrical system (96 pages) - component location, electric circuit, electrical component specification, connectors.
• Mechatronics system (138 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, boom floating control system, intelligent power control system, anti-restart system, self-diagnostic system, engine control system, EPPR valve, monitoring system.
• Troubleshooting (84 pages) - before troubleshooting, hydraulic and mechanical system, electrical system, mechatronics system, air con&heater system.
• Maintenance standard (42 pages) - operational performance test, major components, track and work equipment.
• Disassembly and assembly (192 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.

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 HX400A L, 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 HX400A L. The HX400LT3 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 HX400A. 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?
771 pages, in 8 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.