Dingtai manufactures Caterpillar bulldozer spring coils, also called recoil springs. These heavy-duty coils absorb track impact shock and maintain correct track tension in undercarriage systems.
We provide factory-direct supply with full OEM manufacturing services. Global distributors and equipment owners receive dimension-accurate replacement spring coils without intermediary markups.
The coil prevents track derailment and frame stress. Our heat-treated spring steel resists fatigue, sagging, and sudden breakage under continuous shock loads and abrasive jobsite conditions.
Dingtai holds 20+ years of heavy machinery parts manufacturing experience. ISO9001 and SGS certifications verify consistent quality controls, material traceability, and dimensional accuracy for every production batch.
We use hot-coiled 60Si2MnA alloy steel with controlled quenching, tempering, and shot peening. Magnetic particle testing detects micro-cracks before shipping to ensure long service life.
Core Selling Points
- Premium Spring Steel Material: Hot-coiled 60Si2MnA or 55CrSi alloy steel provides high tensile strength and excellent fatigue resistance under repeated impact loads.
- Deep Quenching/Heat Treatment: Controlled quenching and tempering achieve uniform hardness and prevent coil sagging, cracking, or premature deformation in heavy track systems.
- 100% QC Inspection: Each spring coil undergoes dimensional checks, hardness testing, and magnetic particle inspection to eliminate hidden defects before shipment.
- OEM Capabilities: We match OEM drawings and part numbers, producing direct replacement coils for Caterpillar dozer recoil assemblies with tight tolerance control.
Our catalog of Caterpillar Bulldozer Spring Coil includes various specifications, fully compatible with Caterpillar excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 60Si2MnA / 55CrSi hot-coiled alloy spring steel |
| Hardness | HRC 42–48 after quenching and tempering |
| Process | Hot coiling, controlled heat treatment, shot peening, magnetic particle inspection |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months / 2,000 operating hours against manufacturing defects |
OEM & Customization
We produce custom spring coils from customer drawings or samples. Dimensions, coil diameter, free length, and load ratings match OEM requirements with strict tolerance control.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Bulldozer / Track-Type Tractor | Caterpillar | D3, D4, D5, D6, D7, D8, D9, D10, D11 |
Delivery & Logistics
We ship globally with reliable freight options. Factory-direct pricing and flexible MOQ support both urgent replacement orders and scheduled fleet maintenance inventory programs.
Technical Features
The recoil spring absorbs front idler shock loads. When the dozer hits rocks or uneven ground, the coil compresses and rebounds, protecting final drives and track frames from impact damage.
Hot-coiled alloy steel with shot peening creates residual compressive stress on the surface. This delays fatigue crack initiation and extends service life under cyclic loading.
Precision heat treatment ensures stable free length and load capacity after repeated compression. Hardness and microstructure checks prevent sagging and brittle fracture in cold climates or high-impact operations.
Applications
- Mining and quarry overburden removal
- Road construction and grading
- Landfill compaction and waste handling
- Forestry and land clearing
- Heavy earthmoving and infrastructure projects
Frequently Asked Questions
Q: What is the minimum order quantity (MOQ)?
A: One piece for stock models. Custom OEM orders usually require 10–20 pieces depending on dimensions and tooling.
Q: What is the delivery time?
A: Stock sizes ship in 3–7 days. Custom production takes 25–35 days after drawing confirmation and deposit.
Q: How deep is the heat treatment?
A: Surface hardness reaches HRC 42–48. Quenching depth is controlled to balance wear resistance and core toughness.
Q: What is the warranty policy?
A: 12 months or 2,000 operating hours. We replace coils with confirmed material or manufacturing defects.
Q: How do I match part numbers?
A: Provide the OEM part number, machine model, or samples. We cross-reference engineering drawings and confirm dimensions before production.
Q: Can you produce non-Caterpillar coils?
A: Yes, we manufacture replacement spring coils for Komatsu, Liebherr, Shantui, and other major bulldozer brands.
Q: What material do you use?
A: 60Si2MnA or 55CrSi alloy spring steel. Material certification is available with each batch.
Maintenance Guide
- Inspect spring coil and recoil assembly every 500 operating hours. Look for visible cracks, corrosion pitting, or coil deformation.
- Check track sag and recoil travel. Excessive track sag indicates weak or broken spring coil and requires immediate service.
- Clean the recoil housing before installation. Remove abrasive dirt and debris that can score the spring seat or coil surface.
- Use proper lifting tools during replacement. Never compress the coil with improvised tooling; use a certified spring compressor.
- Lubricate contact surfaces lightly and torque fasteners to OEM specifications. Verify free length and load rating after installation.