CAT345B CAT345D Track Adjuster Assembly fit Caterpillar Excavator Undercarriage Parts
Heavy-duty track adjuster assembly for Caterpillar CAT345B and CAT345D excavators. Designed to maintain precise track tension and ensure smooth undercarriage operation, it features a robust cylinder, high-quality spring, and reliable sealing system for long-lasting performance in the toughest job environments.
| 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 |
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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 Caterpillar CAT345B / CAT345D Track Adjuster Assembly is a critical component in the excavator’s undercarriage system. It maintains optimal tension in the track chain, preventing derailment, excessive wear, and track sagging. Built to OEM specifications, this assembly combines strength, precision, and hydraulic reliability—essential for heavy excavation, quarrying, and mining operations.
Key Components and Structure
Each track adjuster assembly consists of:
- Cylinder Body: Made from high-tensile forged steel for maximum resistance against pressure and corrosion.
- Recoil Spring: Large-diameter alloy spring with controlled elasticity to absorb shock loads and maintain consistent tension.
- Front Idler Yoke Connection: Precisely machined interface to ensure smooth alignment with the idler wheel.
- Grease Valve & Fitting: Allows easy pressure adjustment and maintenance of the hydraulic grease system.
- Seal Kit: Includes high-quality NBR or PU seals to prevent oil leakage and contamination under high pressure.
Material & Manufacturing Process
The adjuster body is crafted from forged 40Cr or 42CrMo steel, followed by CNC machining to achieve tight dimensional tolerances.
- Heat Treatment: Ensures uniform hardness and fatigue strength, preventing deformation under heavy stress.
- Precision Machining: Guarantees a smooth piston surface and perfect cylinder bore for optimal hydraulic sealing.
- Assembly & Testing: Each unit is pre-assembled and tested for hydraulic performance and pressure retention before packaging.
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.
Performance Advantages
Reliable Track Tensioning: Maintains stable chain pressure to prevent slack and premature wear.
- Shock Absorption: Recoil spring design helps absorb impact from uneven terrain and heavy-duty operation.
- Leak-Proof Operation: Premium sealing technology eliminates hydraulic leakage and contamination.
- Long Service Life: Heat-treated parts and corrosion-resistant coatings extend durability under extreme conditions.
Quality Inspection
Every track adjuster assembly undergoes:
- Pressure Testing: Hydraulic integrity verified under 1.5x rated pressure.
- Leak Test: Seal performance evaluated through static and dynamic cycles.
- Dimensional Inspection: Tolerance checks to ensure exact fit with Caterpillar undercarriage systems.
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.
Installation & Maintenance Tips
To ensure optimal performance:
- Regularly inspect for oil leaks and spring deformation.
- Use OEM-grade grease during tension adjustment.
- Avoid over-tightening the track to reduce stress on the adjuster cylinder and seals.
- Replace seals periodically in high-hour machines.
The Caterpillar CAT345B / CAT345D Track Adjuster Assembly is engineered for high performance and durability. By maintaining consistent track tension and reducing stress on the undercarriage, it enhances overall machine stability and operational efficiency—making it an indispensable component for heavy-duty earthmoving and construction operations.
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.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
