Dingtai manufactures Liebherr spring coils (recoil springs). They absorb track impact shocks and maintain constant crawler undercarriage tension.
Factory-direct production supports full OEM service. We supply replacement Liebherr spring coils for distributors, fleet owners, and aftermarket parts exporters worldwide.
Weak springs cause track derailment and premature final drive wear. Our heavy-duty coils resist fatigue cracking, lost tension, and costly unplanned downtime.
Dingtai has 20+ years manufacturing undercarriage parts. ISO9001 and SGS certified processes deliver repeatable quality for the world’s most demanding job sites.
Premium 60Si2Mn spring steel and controlled quenching produce deep hardness. Shot peening and pre-setting ensure stable load performance under continuous excavation stress.
Core Selling Points
- 20+ Years Experience: Dingtai has supplied heavy machinery undercarriage parts for over two decades. Our engineering team understands Liebherr load requirements and OEM replacement tolerances.
- OEM Capabilities: We manufacture from OEM drawings or physical samples. Dimensional accuracy and load ratings match original Liebherr equipment specifications for direct replacement.
- Deep Quenching/Heat Treatment: Controlled austempering and tempering create uniform hardness. This process prevents surface brittleness while improving fatigue life under high-frequency compression cycles.
- 100% QC Inspection: Every spring coil undergoes dimensional checks, load testing, and magnetic particle inspection. Only certified parts with stable free length are released.
Our catalog of Liebherr Spring Coil includes various specifications, fully compatible with Liebherr excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 60Si2Mn / 55CrSi high-tensile spring steel |
| Hardness | HRC 45–52 after controlled heat treatment |
| Process | CNC coiling, quenching, tempering, shot peening, load testing |
| Certification | ISO9001 / SGS material certification |
| Warranty | 12 months or 2,000 working hours |
2. OEM & Customization
We match OEM drawings, free length, coil diameter, and load ratings. Custom dimensions follow strict OEM engineering standards.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavators | Liebherr | R 900, R 926, R 934, R 944, R 954, R 964, R 974, R 984 |
| Mining Excavators | Liebherr | R 9100, R 9200, R 9350 |
| Crawler Dozers | Liebherr | PR 724, PR 734, PR 744, PR 754, PR 764 |
4. Delivery & Logistics
We ship factory-direct worldwide via sea, air, or express courier. Flexible MOQ supports urgent replacement orders and bulk container programs.
Technical Features
The recoil spring coil stores impact energy when the idler moves backward. It releases that energy smoothly to maintain track tension and reduce final drive shock.
Shot peening creates compressive stress on the coil surface. This prevents micro-crack propagation and extends spring fatigue life under continuous rock loading.
Pre-setting compresses the spring beyond working stroke during manufacturing. This stabilizes free length and prevents load loss after installation.
Applications
- Mining: Hard rock excavation and ore loading with continuous impact cycles.
- Quarrying: Track-type machines working on abrasive blasted rock surfaces.
- Road Construction: Heavy grading and trenching operations in compacted soil.
- Heavy Civil: Deep foundation, demolition, and mass excavation projects.
- Forestry & Material Handling: Tracked material handlers and logging shovels.
Frequently Asked Questions
What is your minimum order quantity for Liebherr spring coils?
Standard MOQ is 1 piece for sample or urgent replacement. Bulk pricing applies from 10 pieces per specification.
What is the delivery time?
Stocked standard models ship in 3–7 days. Custom production requires 15–25 days depending on order quantity.
What heat treatment depth do you achieve?
Our quenching process hardens the full section based on material grade. Surface hardness reaches HRC 45–52 without brittle core failure.
What warranty policy applies?
We provide 12 months or 2,000 working hours warranty against material and manufacturing defects under normal operating conditions.
Can you match OEM part numbers?
Yes. Send the Liebherr part number or drawing. Our engineers cross-check free length, outer diameter, wire diameter, and load rate.
Do you test every spring coil?
Yes. Each batch undergoes 100% dimensional inspection, load testing, and magnetic particle testing before shipment.
Maintenance Guide
- Installation: Verify free length and outer diameter match the original part. Lubricate contact seats and align the coil squarely in the recoil housing.
- Inspection Interval: Check track sag every 250 operating hours. Sudden track loosening often indicates spring fatigue or broken coil segments.
- Replacement Warning: Replace both spring coils if one shows visible coil gap deformation, surface cracks, or reduced recoil stroke. Never mix old and new springs.