Maintenance & Support

The success of Weichai is reinforced by the people who stand behind our products. Working with us means you receive end-to-end care of products and services and ensuring you're getting the most out of your investment. Our goal is maximum your satisfaction with the performance of Weichai products, services and our people.

Maintanence & Service Manual:

I. Maintenance Manual for Bus Engine

WP2.3/WP2.3N Bus Engine	Download
WP3/WP3N Bus Engine	Download
WP3.7 Bus Engine	Download
WP4.1/WP4.1N/WP4.6N Bus Engine	Download
WP4/WP6 Bus Engine	Download
WP5/WP7 Bus Engine	Download
WP9H Bus Engine	Download
WP10H Bus Engine	Download
WP10 Bus Engine	Download
WP12 Bus Engine	Download

II. Maintenance Manual for Truck Engine

WP2.3/WP2.3N Truck Engine	Download
WP3/WP3N Truck Engine	Download
WP3.7 Truck Engine	Download
WP4.1/WP4.1N/WP4.6N Truck Engine	Download
WP4/WP6 Truck Engine	Download
WP7 Truck Engine	Download
WP9H/WP10H Truck Engine	Download
WP10 Truck Engine	Download
WP12 Truck Engine	Download
WP13 Truck Engine	Download

III. Maintenance Manual for Marine Engine

* Upon as your request

Weichai Engine Diagnostic Software:

The software is exclusively developed and researched by Weichai Power. Connected to ECU via DiagSmart, the device can transfer data to PC, smartphone via USB connection or Wifi. Through software, users can check the operating status of the engine, sensors as well as actuator components, can extract data files, data streams. It's supported the repair process as well as timely detection and handle big error.

* DiagSmart 3.6.0 (updated Sep 2023): Download

Customer Assistance

For general inquiries, questions regarding your Weichai products, or assistance locating authorized distributors or dealers, please complete the form below.

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