The track cylinder piston is the core moving component inside hydraulic track adjusters, maintaining proper track tension and absorbing shock.
As a factory-direct manufacturer, Dingtai provides full-range OEM track cylinder pistons with precise dimensions and material compliance for global distributors.
Our pistons feature hardened surfaces and precision sealing grooves to reduce hydraulic leakage and prevent sudden track loosening failures.
With over 20 years of manufacturing excellence and ISO9001/SGS certifications, Dingtai ensures every piston meets international quality standards.
Manufactured from 35MnB steel with deep induction quenching, the piston surface achieves high hardness for superior wear resistance.
Core Selling Points
- Global Brand Compatibility: Our pistons are designed to directly replace OEM parts for Caterpillar, Komatsu, Hitachi, and other leading brands, ensuring seamless fitment.
- Premium 35MnB Material: Forged from high-grade 35MnB alloy steel, the piston provides exceptional tensile strength and resistance to fatigue cracking under cyclic loads.
- Deep Quenching & Hardening: Induction hardening achieves a surface hardness of HRC 52-58, significantly extending service life in abrasive environments.
- 100% QC Inspection: Every piston undergoes dimensional checks, hardness testing, and seal groove precision verification before shipment.
Our catalog of Caterpillar Track Cylinder Pistons includes various specifications, fully compatible with Caterpillar, Komatsu, Hitachi, Volvo, and Kobelco excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB Alloy Steel |
| Hardness | HRC 52-58 (Surface) |
| Manufacturing Process | Precision Forging + Induction Hardening |
| Seal Groove | CNC Machined |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 Months After Shipment |
2. OEM & Customization
We match customer-provided drawings or samples, producing pistons to strict OEM tolerances with custom dimensions, seal groove profiles, and surface coatings.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Hydraulic Excavator | Caterpillar, Komatsu, Hitachi, Volvo, Kobelco, Hyundai | CAT 320C/D, 330C, 336D; Komatsu PC200-8, PC300; Hitachi ZX200, ZX330 |
| Bulldozer | Caterpillar, Komatsu | CAT D6R, D8R; Komatsu D65, D85 |
4. Delivery & Logistics
We offer factory-direct pricing with flexible MOQ, reliable sea/air shipping, and standard packaging to ensure pistons arrive without damage and on schedule.
Technical Features
The piston converts hydraulic pressure into linear force to extend the track idler, maintaining correct chain tension and absorbing operational shocks.
Deep induction hardening creates a wear-resistant case up to 2 mm depth, protecting the piston rod contact zone from abrasion and scoring.
Precision CNC-ground seal grooves ensure perfect O-ring and backup ring seating, eliminating internal leakage that causes gradual track loosening.
Applications
- Mining
- Road Construction
- Quarrying
- Demolition
- Forestry
Frequently Asked Questions
What is the minimum order quantity (MOQ) for track cylinder pistons?
Our standard MOQ is 10 units per specification, but we can accommodate trial orders with slightly higher unit price.
How long does delivery take?
Regular orders ship within 15–25 working days. Express air freight can be arranged for urgent requirements in 7–10 days.
What is the heat treatment depth of the piston surface?
Induction hardening achieves a case depth of 1.5–2.5 mm, with surface hardness HRC 52–58, depending on model.
Do you offer a warranty?
Yes, we provide a 12-month warranty against manufacturing defects under normal operating conditions.
Can Dingtai match OEM part numbers?
Absolutely. We manufacture to OEM drawings or samples, matching exact dimensions, seal groove profiles, and surface treatments for direct replacement.
Are the pistons compatible with other brands besides Caterpillar?
Yes, our pistons fit Komatsu, Hitachi, Volvo, Kobelco, and many others. Provide your machine model for verification.
What materials are used?
The pistons are forged from 35MnB alloy steel, selected for high strength, toughness, and excellent hardenability.
How do I ensure the correct piston for my track adjuster cylinder?
Send the cylinder bore size, piston OD, seal groove dimensions, or OEM part number for precise identification.
Can you produce custom track cylinder pistons?
Yes, we offer full OEM services with custom dimensions, materials, and coatings per your technical drawings.
What certifications do you hold?
We are ISO9001:2015 certified and all products undergo SGS inspection upon request to guarantee quality.
Maintenance Guide
- Check cylinder bore for scoring before installing a new piston; clean thoroughly to avoid seal damage.
- Apply hydraulic oil to seals during assembly to prevent dry start-up friction and ensure proper lip seating.
- Monitor track tension weekly; if constant readjustment is needed, inspect the piston and seals for internal leakage.
- Replace pistons when surface hardness wear exceeds 0.5 mm depth or when seal grooves show polishing, indicating blow-by.