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I appreciate the help from Paul, he's prefessional and knows exactly what parts I need. My CAT has gone back to work without any problem.

—— Raphael

Got the final drive and its beautiful I think. We've have it assembled in our Hitachi ZX330 excavator, my machines goes to work again now. Many thanks

—— Kevin

Fast shippment, the arrived parts is good quality, our engine is repaired and is perfectly running at maximum power. Thank you, god bless.

—— Mohammed

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Company Blog

Common Faults and Repair Methods of Excavator Main Control Valve

[2023-06-16 14:47:32]

The excavator main control valve (distribution valve) is responsible for distributing hydraulic flow and pressure to each actuator (boom, arm, bucket, travel, swing). Any fault in the valve directly affects machine performance, causing weak, slow, or abnormal motions. I. Common Symptoms of Main ... Read More

Common Causes and Solutions for Hydraulic Breaker Weak Impact

[2022-12-08 14:01:39]

Hydraulic breaker weak impact (reduced striking force, slower frequency) is usually caused by issues in the hydraulic system, nitrogen pressure, mechanical wear, or improper operation. I. Hydraulic System Issues (Over 60%) 1. Insufficient Hydraulic Oil Flow Causes: Excavator main pump wear resulting ... Read More

Differences Between Electronic Injection and Direct Injection Engines

[2017-03-17 13:36:18]

Electronic Injection vs. Direct Injection — Simplified Engineer’s Explanation 1. What Is a Direct-Injection Engine? Direct injection means fuel is sprayed directly into the combustion chamber on top of the piston. Key features: Multi-hole injectors, high injection pressure High combustion efficiency... Read More

Causes of Hydraulic System Overheating in Older Construction Machinery and Simple Inspection Methods

[2025-05-02 14:06:34]

For older construction machinery, overheating of hydraulic systems is a common issue and a frequent headache. Let’s discuss some causes and simple inspection methods. For mature and well-established machines, the original design already fully meets the cooling requirements of the hydraulic system. ... Read More

Discussion on the Differences Between Construction Machinery Engines and Automotive Engines

[2017-08-18 13:58:29]

Discussion on the Differences Between Automotive and Construction Machinery Engines Understanding the differences between automotive engines and construction machinery (industrial) engines requires familiarity with internal combustion engine principles and national standard classifications. This ... Read More

Discussion on Replacing All Fuel Injectors at Once in Electronic Fuel Injection Engines

[2024-11-15 13:45:02]

This issue is actually quite common. Except for electrical faults that can be detected using diagnostic instruments, wear of mechanical fuel system components can only be addressed by replacing all injectors simultaneously. Worn components lack sensors, so the engine control unit (ECU) cannot detect ... Read More

Precautions After Replacing the Hydraulic Pump and Hydraulic Oil

[2024-09-13 12:13:20]

Precautions After Replacing the Hydraulic Pump and Hydraulic Oil in Construction Machinery Hydraulic pumps and hydraulic oil are essential for construction machinery—even electric excavators rely on hydraulic transmission systems. Replacing a hydraulic pump is a common task, but many have suffered ... Read More

Some Thoughts on the Causes of High Temperature in Machinery Cooling Systems.

[2024-02-23 12:03:22]

High-Temperature Issues in Construction Machinery Cooling Systems – Key Points 1. Cooling System Performance Deficiency (Most Common Cause) Fan speed and belt condition: Slipping or worn belts reduce fan RPM and cooling efficiency. Check fan speed with a tachometer; replace belts if the top surface ... Read More

The importance of evaluating the performance of engines and hydraulic systems

[2024-05-09 11:56:34]

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. ... Read More

Fault Analysis of Difficult or Failed Starting in Electronic-Controlled Diesel Engines

[2024-12-03 11:47:55]

Troubleshooting Guide: Starting Issues in Electronically Controlled Diesel Engines 1. Preliminary Checks Fuel supply Ensure the fuel tank has adequate diesel. Check fuel lines for blockages or incorrect assembly after maintenance. Electrical system Verify battery voltage and condition. Check fuses ... Read More

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