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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

Replacement Procedure for Slewing Bearing Seals (Hydraulic/Mechanical Excavators and Similar Machinery)

[2024-08-16 11:41:34]

Slewing Bearing Seal Replacement Guide Applicable Machines: Excavators and similar hydraulic machinery 1. Tools and Materials Required High-quality replacement slewing bearing seal (cut to OEM-specified length) Flathead screwdriver 502 adhesive (cyanoacrylate glue) Cleaning rags or solvent 2. Step... Read More

Characteristics of Hydraulic Return Check Valve Failure

[2024-09-05 11:35:42]

Hydraulic System Cooler Bypass Valve and Return Check Valve — Technical Reference Applicable Machines: Excavators and similar hydraulic systems 1. Valve Overview In the low-pressure return circuit of many excavators, there are two similar but functionally different valves: Valve Common Name Primary ... Read More

Diagnosis of Cold Starting Problems in the 4M40 Engine During Winter

[2024-11-10 11:32:53]

The Mitsubishi 4M40 engine was originally designed for the Mitsubishi Pajero off-road vehicle, with an output of 150 PS. It is an automotive diesel engine, featuring a timing chain drive, single overhead camshaft (SOHC), and shim-type valve clearance adjustment. The original engine was equipped with ... Read More

Troubleshooting Methods for Hard Starting of Mitsubishi 4M40 Engine in Cold Weather

[2024-06-07 11:18:45]

The Mitsubishi 4M40 engine was originally designed for the Mitsubishi Pajero SUV, with an output of 150 PS. It is an automotive-type diesel engine, featuring a timing chain drive, single overhead camshaft (SOHC), and shim-adjusted valve clearance. The original fuel injection pump was a Delphi (U.S.) ... Read More

Causes and Simple Diagnostic Methods for Hydraulic System Overheating in Aged Machines

[2023-06-01 11:04:02]

For construction machinery that has been in service for many years, overheating is a common — and often frustrating — issue. Let’s explore the problem in a practical way. For machines that were originally well-designed and proven reliable, their hydraulic systems were fully capable of meeting normal ... Read More

Assembly and Adjustment of the Hypoid Main Reducer in Loaders

[2020-09-10 10:55:23]

I once worked for several years in a large state-owned enterprise, mainly engaged in the repair of imported on-road and off-road trucks, so I have some experience in truck maintenance. (Repairing loaders, however, belongs to the construction machinery field. I haven’t really repaired domestic ... Read More

Case Study: Online Treatment of Water-Contaminated Hydraulic Oil

[2021-04-05 15:00:41]

Normally, when hydraulic oil becomes contaminated by water, the standard procedure is to replace it with new oil. If the replacement is incomplete, it can leave hidden risks in the hydraulic system. There are multiple cases of hydraulic pump and swing motor failures and hydraulic cylinder seal ... Read More

Case Study: CAT 349E Excavator – Emissions Failure Causing Derated Power

[2019-10-04 14:17:37]

A batch of CAT 349E excavators (including the 336E series) purchased from Shenzhen entered the market. After a period of use, these machines all suffered from derated power and could not operate normally. Even the so-called “experts” who claim they can fix anything were unable to resolve the ... Read More

Onsite Engine Power Testing for Construction Machinery

[2021-08-12 13:55:59]

This discussion covers basic knowledge, not a magical one-step solution. However, if you truly internalize this, it can bring significant practical benefits. Unfortunately, technical discussions in many forums are fading, and most posts are just: “My machine broke, what should I do?” 1. Purpose of ... Read More

Post-Flood Handling Procedures for Construction Machinery

[2018-10-26 13:47:02]

Construction machinery often encounters flooding due to construction activities, accidents, or natural disasters. Operators are advised to follow the guidelines below to properly handle machinery after it has been submerged. I. Do Not Start the Machine Prematurely Before thoroughly inspecting a ... Read More

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