Construction Machinery Remanufatcuring Process

Differing from superficial refurbishment, REMAN ROAD systematic construction machinery remanufacturing process eliminates hidden mechanical risks and delivers stable, cost-effective equipment for global engineering clients.

Machinery Remanufacturing Overview

There is a huge gap between casual cosmetic renovation and formal industrial construction machinery remanufacturing process.
At REMAN ROAD, we adhere to unified industrial specifications and implement a complete, traceable equipment remanufacturing process workflow covering disassembly, cleaning, precision testing, component restoration, assembly and full-load commissioning.
Every piece of used equipment undergoes rigorous multi-stage processing to restore its overall performance to OEM standards, effectively eliminating hidden mechanical faults caused by shoddy workmanship and bringing secure, durable and cost-efficient construction machinery to global engineering fleet owners.

VARIOUS TYPES OF MACHINERY REMANUFACTURING PROCESS：

CONSTRUCTION MACHINERY REMANUFACTURING PROCESS：

Step 1: Used Machine Receipt, Initial Inspection & File Creation

Verify the machine’s overall appearance, service history, and operating conditions item by item, and establish a unique, traceable electronic record.

Retired construction machinery are delivered to the factory. We take comprehensive photos of the whole vehicle and collect basic information including model, factory serial number, total working hours, past maintenance records and complete configuration list.

Conduct trial running tests under no load to check basic conditions such as engine power, hydraulic system leakage, travelling, slewing, braking and electrical systems.

Visually inspect structural components for cracks on frames and booms, chassis deformation and bucket wear.

Issue an Equipment Remanufacturing Evaluation Report to grade the reusability of each machine and build a unique traceability file. Equipment with severe damage that cannot be restored will be excluded from remanufacturing.

Step 2: Complete Non-destructive Dismantling of The Whole Machine

The biggest difference between formal construction machinery remanufacturing process and simple refurbishment lies in thorough disassembly down to the smallest individual parts.

Dismantle the machinery in order according to six modules: power system, hydraulic assemblies, frame structural parts, travelling chassis, working devices and cab electronic control system.

Special tooling is adopted for non-destructive disassembly to avoid secondary damage to threads, shells and precision components caused by forced dismantling.

After disassembly, all parts are sorted, labeled and bound to the equipment file, classified into three categories: restorable parts, scrapped parts to be replaced and reusable standard part

Step 3: In-depth Global Cleaning Treatment

Remove oil stains, rust and accumulated sediment completely.

Large components such as frames and chassis: cleaned by high-temperature high-pressure steam and sandblasting to strip heavy sludge, rust layers and old paint surfaces.

Precision small parts (plungers, valve blocks, gears, bearings, crankshafts, etc.): deeply degreased via ultrasonic soaking and industrial chemicals.

Hydraulic pipelines are flushed thoroughly to clear internal sludge and metal debris.

All cleaned parts are dried and anti-rust treated to prevent secondary corrosion; only parts meeting cleanliness standards can enter the testing phase.

Step 4: Precision Inspection & Classification of All Components

Every part is measured dimensionally and tested via non-destructive flaw detection. Any part exceeding OEM tolerance standards cannot be reused.

Structural parts (frames, sticks, booms): tested by magnetic particle and penetrant inspection to detect internal hidden fatigue cracks; deformation volume is remeasured, and severely deformed pieces are scrapped.

Core power components (cylinder block, crankshaft, camshaft): roundness and cylindricity are precisely measured; overly worn parts are fully replaced.

Hydraulic fittings (pumps, motors, cylinders, distribution valves): tightness and clearance are inspected; all aging sealing components are discarded.

Consumable standard parts (oil seals, bushings, filter elements, belts, bearings): 100% replaced with new items without reuse. All components are archived and marked into three groups: qualified restorable parts, scrapped replacement parts and intact reusable parts.

Step 5: Restoration of Failed Parts & Replacement With Brand-new Accessories

Worn metal surfaces are restored to original dimensional accuracy via advanced surface engineering technologies; parts beyond repair are replaced with OEM-matched brand-new spare parts.

Worn shafts and cylinder barrels are repaired by laser cladding and plasma spraying, then polished to original factory tolerance to enhance wear resistance and service life.

Cracked frames are welded with high-strength structural welding, followed by secondary flaw detection to ensure crack-free welds and structural strength equivalent to new machines.

Engine internals are fully overhauled: cylinder liners, piston rings and valves are replaced; fuel injectors are calibrated to eliminate insufficient power, excessive smoke and overheating faults.

All hydraulic oil seals and pipelines are renewed; valve block pressure is calibrated to eradicate jitter, slow movement and oil leakage issues.

Severely worn travelling components including track rollers, idlers and chains are wholly replaced to guarantee smooth travelling performance.

Step 6: Modular Standard Assembly of Complete Equipment

Assembly is carried out strictly in accordance with OEM procedures and torque specifications.

Pre-assemble and debug the engine assembly and main hydraulic system first on the bench.

Install the lower travelling chassis, upper revolving platform and working attachments sequentially.

Rearrange the whole vehicle wiring harness; aging wire harnesses are entirely renewed to prevent short circuits.

Refill all vehicle fluids including engine oil, hydraulic oil, gear oil and coolant with fluids meeting OEM standards.

Every assembly step is recorded with operator signatures and incorporated into the equipment traceability file.

Step 7: Multi-level Strict Performance Testing

Two rounds of tests are conducted: bench static testing and full-load field operation testing. Only reman machinery with all parameters qualified can be delivered.

Bench Static Testing

Calibrate engine rotating speed, power and fuel consumption; test hydraulic system pressure, flow rate and response speed; debug braking, slewing and travelling linkage under no load.

Full-load Working Condition Field Test

  • Continuous compound operation tests including digging, lifting and slewing;
  • Long-time idling durability test and ramp climbing test under heavy load;
  • 72-hour uninterrupted loaded operation to monitor oil temperature, oil pressure, leakage and abnormal noise.
  • Only equipment whose power, hydraulic response, control and braking indicators fully reach OEM specifications can pass; unqualified machinery will be returned for rework and are prohibited from leaving the factory.

Step 8: Whole Vehicle Painting, Marking, File Handover & Warranty Filing

All qualified remanufactured machinery will be finished, labeled, archived and issued with global warranty certificates before final delivery.

Level the sheet metal surface, apply anti-rust primer and wear-resistant topcoat for uniform, anti-corrosive finish.

Paste exclusive machinery remanufacturing traceability labels, whole-machine serial numbers and parameter nameplates bound to electronic archives.

Compile complete machinery remanufacturing documents including disassembly records, inspection reports, parts replacement lists and performance test data sheets.

Issue official warranty agreements and input information into the after-sales system. For overseas orders, we prepare full customs clearance documents to support cross-border quality traceability and after-sales service.