Dingtai manufactures Mitsubishi spring coils for crawler excavators and bulldozers. This component maintains track tension and absorbs heavy impact energy in the undercarriage system.
We offer factory-direct OEM manufacturing and replacement services for global distributors, dealers, and fleet maintenance teams. No intermediaries, consistent quality, competitive pricing.
Fatigue and coil failure cause track derailment and costly downtime. Our springs resist sag and cracking, keeping track tension stable in severe operating conditions.
With over 20 years of heavy machinery component experience, Dingtai operates under ISO9001 and SGS-certified quality systems. Every batch is traceable and test-certified.
We use 60Si2MnA or 55CrSi spring steel, precision hot winding, controlled tempering, and shot peening to deliver consistent load-bearing performance.
Core Selling Points
- 20+ Years Experience: Dingtai has manufactured undercarriage and track adjustment components for over 20 years, supplying stable OEM and aftermarket programs across North America, Australia, and Southeast Asia.
- Global Brand Compatibility: Mitsubishi spring coils are cross-referenced to OEM part numbers and compatible with equivalent Komatsu, Caterpillar, Hitachi, and Kobelco undercarriage systems.
- ISO9001/SGS Certified: Our factories operate under ISO9001 quality management and SGS material verification, giving procurement teams traceable test reports and consistent production control.
- 100% QC Inspection: Every coil undergoes dimension checks, hardness testing, and magnetic particle inspection to eliminate surface seams, cracks, and heat-treatment defects before dispatch.
Our catalog of Mitsubishi Spring Coil includes various specifications, fully compatible with Mitsubishi excavators and bulldozers, plus equivalent OEM part numbers for Komatsu, Caterpillar, Hitachi, and Kobelco.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 60Si2MnA / 55CrSi high-tensile spring steel |
| Hardness | HRC 42–48 after tempering |
| Manufacturing Process | Hot winding, controlled tempering, shot peening, magnetic particle inspection |
| Load Tolerance | ±5% OEM rated compression load |
| Certification | ISO9001 / SGS |
| Warranty | 12 months or 2,000 working hours |
2. OEM & Customization
We manufacture to OEM drawings, custom dimensions, and material specifications. Strict process control ensures Mitsubishi spring coils meet original load, free height, and coil diameter standards.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavator | Mitsubishi, Komatsu, Caterpillar, Hitachi | MS110, MS120, MS140; PC200/PC300; CAT320/CAT330 equivalents |
| Crawler Bulldozer | Mitsubishi, Caterpillar, Komatsu | BD2G, D3C, D4D, D6D, D65 equivalents |
| Track Loader | Mitsubishi, Caterpillar | BS3, 931, 935 equivalents |
4. Delivery & Logistics
We ship factory-direct from Quanzhou, China, with flexible MOQ for trial orders. Standard export packaging and reliable freight forwarders support FOB, CIF, and DDP terms.
Technical Features
The coil spring is manufactured from 60Si2MnA or 55CrSi steel, quenched and tempered to balance hardness and fatigue life under cyclic impact loading.
Shot peening creates compressive surface stress, delaying crack initiation in the spring wire. This process is critical for recoil springs in high-impact undercarriage applications.
Each spring’s free height and load curve are verified against OEM data, ensuring consistent track shoe tension and reduced final drive shock.
Applications
- Open-pit mining excavators and dozers
- Road construction and earthmoving
- Quarry and aggregate loading
- Demolition and heavy civil works
- Forestry and pipeline machinery
Frequently Asked Questions
What is the MOQ for Mitsubishi spring coils?
Trial orders typically start at 2 pieces per part number. Mixed containers are accepted for distributor and dealer programs.
What is the delivery time?
Production takes 15–30 days depending on order quantity. Stocked popular models can ship within 7–10 days.
What material and heat treatment do you use?
Standard material is 60Si2MnA or 55CrSi. Coils are hot wound, oil quenched, tempered to HRC 42–48, and shot peened.
Can you match OEM part numbers?
Yes. Send your Mitsubishi part number or drawing. We cross-reference dimensions and load specifications before quotation.
What warranty do you provide?
We provide 12 months or 2,000 working hours warranty against material and manufacturing defects under normal use.
Do you support custom dimensions?
Yes. We produce non-standard free heights, coil diameters, and load ratings based on customer drawings or samples.
How do I confirm fitment?
Provide the machine model, serial number, or existing part number. Our engineers verify against OEM undercarriage data.
Maintenance Guide
- Inspect Mitsubishi spring coils for corrosion, coil contact wear, and hairline cracks every 500 operating hours, especially in abrasive mining environments.
- Check track sag regularly. Excessive sag or frequent tension adjustment loss often indicates coil fatigue, reduced free height, or broken inner winding.
- Replace recoil springs in pairs to maintain equal track tension and prevent premature undercarriage wear on one side.
- Never weld or cold-straighten a damaged coil. Use OEM torque specifications and proper lifting tools during installation.
- After replacement, cycle the track adjuster several times and verify coil seating before returning the excavator or bulldozer to service.