Dingtai manufactures Liebherr bulldozer carrier rollers, upper track support components that maintain track alignment, reduce vibration, and extend undercarriage service life.
We supply factory-direct carrier rollers with complete OEM manufacturing services, including forging, machining, heat treatment, and assembly for global equipment distributors and end users.
Our carrier rollers prevent premature track wear and downtime through precise tread hardness and sealed lubrication, resisting impact loads and abrasive site conditions.
With 20+ years of undercarriage manufacturing experience and ISO9001/SGS certified processes, Dingtai delivers repeatable quality for demanding construction and mining applications.
We use 35MnB steel and deep quenching to achieve hardened tread surfaces, improving fatigue resistance and extending service life under heavy bulldozer loads.
Core Selling Points
- 20+ Years Experience: Over two decades manufacturing undercarriage components, supplying global OEM and aftermarket clients with proven quality control and engineering support.
- Global Brand Compatibility: Direct replacement for Liebherr PR series bulldozers, engineered to match OEM mounting dimensions and track pitch requirements without modification.
- Premium 35MnB Material: Forged 35MnB steel roller shells provide high tensile strength, impact toughness, and consistent hardness for extended wear life in abrasive conditions.
- Deep Quenching/Heat Treatment: Tread surfaces are deep quenched to HRC 50-56 with hardened depth 4-8mm, reducing spalling and premature roller failure under heavy loads.
Our catalog of Liebherr Bulldozer Carrier Rollers includes various specifications, fully compatible with Liebherr bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB forged alloy steel |
| Tread Hardness | HRC 50-56 |
| Hardened Depth | 4-8 mm |
| Process | Forging, deep quenching, precision machining, assembly |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months or 2,000 operating hours, whichever occurs first |
2. OEM & Customization
Custom carrier rollers are produced from customer drawings or samples, with exact shaft dimensions, bolt patterns, and hardness specifications matching Liebherr OEM standards.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Bulldozer | Liebherr | PR 736, PR 746, PR 756, PR 766, PR 776 |
4. Delivery & Logistics
Factory-direct pricing and flexible MOQ support container, pallet, or sample orders. We use reinforced export packaging and reliable sea/air freight for on-time delivery.
Technical Features
Carrier rollers use a sealed floating ring design that keeps lubricant in and contaminants out, maintaining low rolling resistance under abrasive conditions.
The forged 35MnB shell is deep hardened to create a wear-resistant tread layer while retaining a tough core for impact absorption.
Precision-machined shafts and bushings reduce lateral play, ensuring stable track alignment and even load distribution across the undercarriage.
Applications
- Mining
- Road Construction
- Quarrying
- Landfill Operations
- Forestry
- Demolition
Frequently Asked Questions
Q: What is the minimum order quantity for Liebherr bulldozer carrier rollers?
A: Standard MOQ is 4 pieces per part number. Sample orders and mixed model containers are accepted.
Q: What is the delivery time?
A: Standard rollers ship in 15–25 days after order confirmation. Custom-manufactured rollers require 30–45 days depending on quantity.
Q: What is the heat treatment depth and hardness?
A: Tread surfaces are deep quenched to HRC 50–56 with hardened depth of 4–8 mm, depending on part number and application.
Q: What warranty do you provide?
A: We offer a 12-month or 2,000-hour warranty against manufacturing defects under normal operating conditions.
Q: Can you match specific Liebherr part numbers?
A: Yes. Provide your OEM part number, sample, or dimension drawing. Our engineers verify dimensional and material compliance before quotation.
Q: Are these genuine Liebherr parts?
A: No. Dingtai manufactures aftermarket replacement parts engineered to meet or exceed OEM specifications at factory-direct pricing.
Q: Do you accept samples or trial orders?
A: Yes. We support sample orders and small trial quantities so customers can verify fitment and quality before bulk purchasing.
Maintenance Guide
- Inspect Every 250 Hours: Check for oil leakage, abnormal noise, lateral play, or uneven tread wear during scheduled undercarriage inspections.
- Torque Bolts Correctly: Use calibrated torque wrenches and follow Liebherr OEM bolt torque specifications to prevent misalignment and stress cracking.
- Watch Wear Limits: Replace carrier rollers when tread wear exceeds 20% or when seals leak, surface spalling occurs, or play develops.
- Keep Seals Clean: Avoid high-pressure washing directly at floating seals; contamination accelerates seal failure and lubricant loss.