The engine and hydraulic system are the two core power sources of construction machinery. Their performance directly determines the machine’s operational reliability and efficiency.

When a machine requires maintenance or major overhaul, users naturally seek reliable and high-quality service. Choosing a reputable repair provider is therefore crucial. While some remote users may have limited options, most prefer professional repair shops. However, the maintenance market is uneven, with many claiming to repair any machine—regardless of actual capability.

A top-tier repair facility must ensure:

1. Sound corporate management with integrity and compliance.

2. Strict maintenance procedures, including clean workshops, skilled technicians, and a structured training system.

3. Comprehensive testing equipment to verify performance before and after repairs.

Key testing tools include:

• Engine dynamometers: Traditional hydraulic dynamometers (40–360 kW) allow accurate testing of conventional and electronically controlled diesel engines. Computerized systems can monitor power, torque, speed, fuel consumption, and temperature, providing precise performance data. While simulation software can estimate power, real measurements are essential for reliable results.

• Hydraulic component test benches: Essential for pumps, main control valves, and motors. Offline testing ensures repaired components meet performance standards before installation, preventing post-installation failures. Portable flow meters enable online testing of hydraulic systems in the field, quickly identifying issues such as pump leakage, valve sticking, or rotary joint leaks.

Rigorous testing and verified repair processes significantly improve maintenance quality and efficiency, minimizing rework and enhancing customer trust. High-quality repair shops rely on strict procedures, precise testing, and verified performance to ensure machines operate reliably and efficiently.