Excavator Undercarriage Parts Track Adjuster Tensioner Applicable to CAT 312 E312
High-performance track adjuster assembly for CAT 312 excavators. Built with heat-treated steel and precision seals to ensure long-lasting track tension and smooth undercarriage performance in demanding jobsite conditions.
| Piston Rod | 40Cr / 42CrMo (Hard Chrome Plated) |
|---|---|
| Cylinder Body | Q345 / 45# Steel / 40Cr |
| Return Spring | 60Si2Mn / 65Mn Spring Steel |
| Cylinder Head / End Cap | 45# Steel / Cast Steel |
| Grease Nipple & Fittings | Carbon Steel (Zinc Plated) / Stainless Steel |
| Colors | Black or yellow or customized |
Quick Quote Request
Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
The track adjuster (also known as the recoil spring assembly) is a core component of the E312’s undercarriage system. It maintains proper track tension by absorbing the forward force from the track chain and keeping the front idler in the correct position. This helps ensure smoother travel, reduced wear on undercarriage parts, and improved machine stability during excavation or loading.
When operating in loose soil, rock, or muddy terrain, a reliable track adjuster minimizes track slack and reduces the risk of derailment, improving productivity and safety.
Key Advantages of Our E312 Track Adjuster
Our CAT 312 adjuster assembly is engineered with performance and longevity in mind:
- Forged Steel Cylinder & Piston – Built from high-grade alloy steel for superior strength and fatigue resistance
- High-Compression Coil Spring – Precision heat-treated to absorb shock and maintain track pressure
- Leak-Proof Design – Equipped with advanced sealing technology to withstand internal pressure and oil retention
- OEM-Compatible Fitment – Matches Caterpillar 312 specifications with accurate dimensions and mounting points
- Surface Treated – Corrosion-resistant finish for protection in wet or abrasive environments
Structural Illustration & Cross-Section Insights
Complete Structure Diagram
This detailed view shows the full layout of the track adjuster, including the cylinder body, piston, return spring, grease valve, and front mounting connection. It helps you understand the configuration and how each component works together to maintain optimal track tension.
Cross-Sectional Drawing
The sectional diagram reveals the internal construction, highlighting critical sealing points, the grease chamber, and the piston travel path. This view demonstrates the robust sealing system and precision machining that ensure smooth extension and retraction, even under high pressure and debris-heavy environments.
Manufacturing Process Overview
Our E320D adjusters are crafted from high-tensile structural steel with induction-hardened sliding surfaces, providing both flexibility and impact resistance. The internal cylinder is precision-machined and paired with a corrosion-resistant spring and piston system, ensuring consistent performance even under extreme temperature and pressure.
We also apply anti-rust coatings to all external surfaces to protect against moisture, debris, and corrosion over long-term use. The adjuster is leak-tested and calibrated before dispatch to guarantee durability under high-load operating cycles.
Manufacturing & Quality Control Process
Our tensioning assembly production process includes:
- Raw Material Selection – High-tensile steel selected for pressure-bearing parts
- Forging & CNC Machining – Ensures high structural integrity and tight dimensional tolerances
- Heat Treatment – Spring and piston components undergo quenching for hardness and elasticity
- Sealing System Installation – Durable oil seals and dust rings are assembled with precision
- Surface Finishing – Anti-rust coating or paint is applied
- Assembly & Pressure Testing – Final units are assembled and tested for oil tightness and spring recoil force
OEM Undercarriage Parts for Caterpillar Excavator
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| CATERPILLAR-CAT | CAT55 | CAT225 | CAT245 | CAT311 | CAT312 | CAT312B | CAT315 | CAT320 |
| CAT320B | CAT320C | CAT320D | CAT320L | CAT322 | CAT324 | CAT325 | CAT325B | |
| CAT325BL | CAT330 | CAT330B | CAT330BL | CAT330C | CAT330D | CAT345 | CAT345B | |
| CAT973 | E55 | E70 | E70B | E120 | E120-1 | E120B | E140 | |
| E200B | E200-5 | E215 | E240 | E300B | E300L | E311 | E312 | |
| E312B | E320 | E320BL | E320C | E320D | E320DL | E320L | E320S | |
| E322B | E322C | E324 | E324D | E324DL | E325 | E325B | E325L | |
| E329DL | E330 | E330B | E330C | E330D | E330DL | E345 | E345B | |
| E450 | CAT301.5 | CAT302.5 | CAT303.5 | CAT305 | CAT307 | CAT308 | CAT313 | |
| CAT316 | CAT318 | CAT320E | CAT320GC | CAT323 | CAT326 | CAT329 | CAT336 | |
| CAT340 | CAT349 | CAT350 | CAT365 | CAT374 | CAT375 | CAT385 | CAT385CL | |
| CAT390 | CAT390D | CAT390DL | CAT390FL | CAT395 | CAT6015 | CAT6015B | CAT6015D | |
| CAT6020 | CAT6020B | CAT6030 | CAT6030B | CAT6030D | CAT6040 | CAT6040B | ||
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Compatibility and OEM Reference Numbers
This adjuster is designed for:
- Compatible Models: Caterpillar E312 / CAT 312B / CAT 312C / CAT 312D
- Other compatible machines in the CAT 300 series using similar undercarriage setups
Typical OEM reference numbers (please verify before ordering):
- 158-4796
- 158-4795
- 140-8986
Need help confirming fitment? Provide your machine’s model and serial number — we’ll match it accurately.
Why Choose Our CAT 312 Track Adjusters?
- Consistent Quality Control – Pressure-tested for sealing and spring recoil before shipment
- OEM / ODM Branding Support – Custom logo engraving, label, and packaging for resellers or distributors
- Fast Dispatch & Global Supply – Stable stock and bulk-ready supply for urgent projects
- Pre-Shipment Visual Inspection – We offer photo and video confirmation before delivery for transparency
Application Scenarios: Built for Tough Jobs
Whether you’re excavating on rocky terrain, loading in clay-rich soil, or operating under rainy, humid conditions, the E320D track adjuster delivers reliable tension and resistance to environmental stress. Its durability reduces downtime and prevents damage to surrounding components, making it ideal for long-shift, high-demand operations.
Maintenance Tips
- Check recoil spring tension every 500–1000 working hours
- Inspect for oil leakage or piston wear regularly
- Apply grease through the tension valve only as instructed
- Replace damaged seals promptly to avoid internal corrosion
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
Quick Quote Request
Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
