We manufacture Case track cylinder pistons, the hydraulic components that convert oil pressure into linear force to tension excavator and bulldozer tracks.
Factory-direct production supports OEM and aftermarket programs with custom dimensions, complete machining, and global export to equipment distributors and fleet owners.
Precision-ground surfaces and reliable seal grooves reduce internal leakage, preventing track sag, derailment, and the costly downtime caused by failed tensioners.
With 20+ years of undercarriage manufacturing, we maintain ISO9001 and SGS certified processes, delivering consistent hardness, dimensional accuracy, and batch-to-batch reliability.
We use 40Cr/45# steel with induction hardening and hard chrome plating to create wear-resistant pistons with a tough, fatigue-resistant core.
Core Selling Points
- 20+ Years Experience: Two decades of undercarriage manufacturing provide stable heat treatment control, precise machining, and proven reliability in severe track adjustment applications.
- Global Brand Compatibility: Pistons are produced to match Case OEM part numbers and common aftermarket specifications, ensuring direct replacement for excavator and bulldozer fleets.
- Deep Quenching/Heat Treatment: Induction hardening achieves HRC 48–55 on the sealing surface while maintaining a ductile core, preventing scoring, spalling, and fatigue failure.
- OEM Capabilities: We produce from customer drawings or samples, including custom diameters, seal grooves, threads, and plating thickness to meet exact OEM demands.
Product Catalog
Our catalog of Case Track Cylinder Piston includes various specifications, fully compatible with Case excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 40Cr / 45# Steel (customizable) |
| Hardness | HRC 48–55 (induction hardened) |
| Surface Treatment | Hard chrome plating / precision grinding |
| Process | CNC turning, boring, induction hardening |
| Certification | ISO9001 / SGS |
| Warranty | 12 months |
OEM & Customization
We match customer drawings and samples, producing custom piston diameters, seal groove profiles, thread sizes, and plating specifications to exact OEM tolerance.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavator | Case | CX130 – CX800 Series |
| Bulldozer | Case | M Series (850M, 1150M, 1650M) |
| Track Loader | Case | 455C, 465, 470 |
Delivery & Logistics
We ship from Quanzhou with flexible MOQ, export-grade packaging, and sea or air freight options. Factory-direct pricing supports trial orders and bulk purchasing.
Technical Features
The piston converts hydraulic pressure into linear movement inside the track adjuster cylinder, keeping track tension stable during forward and reverse operation.
Hard chrome plating and precision grinding reduce friction and seal wear, maintaining oil pressure and ensuring consistent tensioner response.
Controlled induction hardening produces a hard surface and tough core, preventing scoring, surface brinelling, and fatigue cracking under repeated shock loads.
Applications
- Mining and quarry haul road maintenance
- Road construction and earthmoving
- Demolition and site preparation
- Forestry and land clearing
- Heavy civil infrastructure and pipeline projects
Frequently Asked Questions
Q: What is the MOQ for Case track cylinder pistons?
A: Standard specifications start at 10 pieces; custom machining may require a higher MOQ. Trial orders can be arranged.
Q: What is the delivery time?
A: Standard pistons ship in 15–25 days. Custom production requires 30–45 days depending on quantity and machining complexity.
Q: What heat treatment depth do you achieve?
A: Induction hardening depth is typically 1.5–3.0 mm. Surface hardness reaches HRC 48–55 while the core remains ductile.
Q: What is the warranty policy?
A: We provide a 12-month warranty against material defects and manufacturing errors under normal operating conditions.
Q: How do I match the correct OEM part number?
A: Send your OEM part number, machine model, or sample. Our engineers verify dimensions, thread pitch, and seal groove geometry.
Q: Can you produce non-standard or custom pistons?
A: Yes, we accept drawings and samples for custom materials, diameters, plating thickness, and packaging requirements.
Q: What materials are used?
A: Standard pistons are 40Cr or 45# steel; high-load applications can use alternative alloys per customer specification.
Maintenance Guide
- Installation: Clean the cylinder bore and piston thoroughly; inspect seal grooves for burrs. Lubricate seals with clean hydraulic oil before assembly.
- Inspection: Check for scoring, chrome peeling, or pitting. Replace if surface roughness exceeds Ra 0.4 µm or if seal grooves show deformation.
- Tension testing: After assembly, cycle the track tensioner several times. Watch for external leakage, sticking, or slow retraction under load.
- Replacement interval: Replace the piston when track tension cannot be maintained or hydraulic pressure drops more than 10% during stationary load tests.