Product Overview
The Komatsu track cylinder piston is a core hydraulic component that regulates track tension, controlling the track adjuster cylinder to maintain correct track engagement.
As a factory-direct manufacturer, Dingtai supplies complete OEM production of pistons from forging to final assembly, serving heavy equipment distributors worldwide.
Engineered to eliminate premature seal failure and cylinder scoring, our pistons prevent costly track derailment and unplanned machine downtime on harsh job sites.
Backed by 20+ years of heavy machinery expertise and ISO9001/SGS certification, Dingtai delivers the repeatable quality procurement directors require.
Manufactured with precision CNC machining and deep case hardening to HRC 58-62, our pistons maintain dimensional stability under extreme hydraulic pressure cycles.
Core Manufacturing Advantages
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OEM Capabilities
We manufacture track cylinder pistons to your exact specifications, matching OEM dimensions, tolerances, and material composition for direct interchangeability.
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Precision Forging
Forged from high-quality alloy steel, our pistons feature a dense grain structure that eliminates porosity and eliminates early fatigue cracking.
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Deep Quenching & Heat Treatment
Case hardening with deep quenching delivers a hard outer surface of HRC 58-62 while retaining a tough core to withstand sudden pressure spikes.
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ISO9001/SGS Certified
Every batch undergoes 100% dimensional inspection and full material traceability per ISO9001, ensuring compliance with global quality standards.
Our catalog of Komatsu Track Cylinder Pistons includes various specifications, fully compatible with Komatsu excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Specification | Detail |
|---|---|
| Material | Forged alloy steel (40Cr) |
| Surface Hardness | HRC 58 – 62 |
| Case Hardening Depth | 1.5 – 2.5 mm |
| Surface Treatment | Precision grinding & polished sealing surface |
| QC Standard | 100% dimensional & hardness inspection |
| Certification | ISO9001, SGS |
| Warranty | 12 months against manufacturing defects |
2. OEM & Customization
We produce pistons per your drawings, with custom diameters, seal groove configurations, and surface coatings, ensuring exact fitment with your cylinder barrel design.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Hydraulic Excavator | Komatsu | PC200-8, PC300-7, PC400-6, PC450-8 |
| Crawler Bulldozer | Komatsu | D65EX-15, D85EX-15, D155A |
4. Delivery & Logistics
We ship from Quanzhou with flexible MOQs, factory-direct pricing, and reliable sea/air freight to major US ports, typically within 25–35 days for bulk orders.
Technical Features
The piston incorporates a precisely ground seal groove designed for high-pressure U-cup seals, preventing internal bypass even under sudden, extreme shock loads.
A hard chrome or nitride-treated surface minimizes friction and corrosion, extending seal service life and reducing stick-slip during track tension adjustment.
Dimensional accuracy is held to ±0.02 mm, guaranteeing seamless alignment inside the cylinder bore and eliminating dynamic misalignment or uneven wear.
Applications
- Mining operations
- Quarry and aggregate
- Road building and highway construction
- Heavy earthmoving and site preparation
- Demolition
- Forestry and land clearing
Frequently Asked Questions
Q: What is the minimum order quantity for Komatsu track cylinder pistons?
A: Our standard MOQ is 10 units per part number. Trial orders of smaller quantities can be arranged for initial testing.
Q: How long does delivery take?
A: Production lead time is typically 25–35 days. Express air freight options are available for urgent demands.
Q: What depth of heat treatment do you achieve?
A: We achieve a case hardening depth of 1.5–2.5 mm with a surface hardness of HRC 58–62, providing superb wear resistance.
Q: Do you offer a warranty?
A: Yes, all pistons carry a 12-month warranty against manufacturing defects under normal operating conditions.
Q: Can I order by Komatsu OEM part number?
A: Certainly. Provide the original Komatsu part number, and we will cross-reference it to our production specifications for an exact match.
Q: Are your pistons compatible with standard aftermarket seals?
A: Yes, our groove dimensions follow OEM specs, making them directly compatible with all major aftermarket seal kits.
Q: How do you ensure quality control?
A: Each piston receives 100% dimensional verification, hardness testing, and surface finish inspection, with full material traceability per ISO9001.
Q: Can you customize seal groove configurations?
A: Yes, we can adjust groove width, depth, and surface finish according to your cylinder design requirements.
Maintenance Guide
- Before installation, thoroughly clean the cylinder bore and inspect for scratches or scoring that could damage new seals.
- Apply a film of clean hydraulic oil to the piston and new seals; never install dry.
- Use a seal compressor tool to align the piston squarely during insertion, avoiding lip damage.
- After assembly, cycle the cylinder several times to purge trapped air and check for external leaks. Monitor track tension weekly and replace the piston when seal grooves exhibit pitting or excessive wear.