Description
Detail Information
| Price Negotiable |
Supply Ability 1,000 Pieces per Month |
Packaging Standard Fumigated Wooden Crate, or Customized |
Delivery Time 1–5 Business Days |
| Payment Terms T/T, XT, PayPal, Western Union |
Shipping Options Sea Freight, Air Freight, Express (DHL/FedEx/UPS) |
Place of Origin China |
The CAT320 center joint lower assembly is a direct-fit rotary manifold engineered for CAT320 model crawler excavators. It connects the upper hydraulic system to the lower frame, routing oil to the travel motor, blade circuit, and other lower components while allowing continuous 360-degree machine rotation without hose twisting.
The assembly is constructed from high-grade alloy steel. Internal oil passages are hard chrome-plated for corrosion resistance and extended service life. Pre-installed polyurethane and NBR seals are lubricated and fitted at the factory, so the unit arrives ready to mount — no additional seal kit purchase required. Each unit passes a multi-circuit pressure test before crating and ships with a 6-month warranty.
Key Features
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Alloy steel body with chrome-plated internal spindles for smooth oil flow and rust resistance
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Pre-installed, factory-lubricated polyurethane and NBR seals — bolt on and connect lines directly
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CNC-machined mounting flanges and port positions for precise fitment on receiver brackets
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Multi-circuit pressure-tested at the factory, rated for continuous working pressure up to 37 MPa
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Packed in VCI anti-rust film and ISPM-15 fumigated wooden crate for safe ocean and air freight
Applications
This center joint is designed for the hydraulic system of CAT320 model crawler excavators. It is commonly replaced during:
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Hydraulic system overhauls
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Center joint seal failure causing external oil leakage
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Internal cross-port leakage resulting in slow travel, swing drift, or weak blade function
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Scheduled preventive maintenance at high-hour service intervals
Suitable industries: machinery repair shops, construction, mining, energy, equipment rental fleets, and retail.
Packaging & Shipping
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Wrapped in VCI anti-rust film to protect machined surfaces
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Padded with high-density foam for shock absorption
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Secured in ISPM-15 fumigated wooden crate as standard
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Custom packaging available on request
Shipping methods: Express (3–7 business days), Air Freight, or Sea Freight. Orders confirmed before 12:00 PM CST typically dispatch the same day when the part is in stock.
FAQ
Q: How do I confirm this fits my machine?
A: Provide your excavator serial number or the OEM part number of your current center joint before ordering. Our technicians cross-reference the details to confirm fitment.
Q: Are the seals pre-installed?
A: Yes. All internal seals come fitted and lubricated from the factory. Mount the assembly and connect hydraulic lines directly — no extra seal kit purchase needed.
Q: What if the part fails during the warranty period?
A: Send us installation photos, an operation video, and a fault description. Three senior technicians will review the case. If confirmed as a quality defect, we replace or refund the part.
Q: Can I order just one piece?
A: Yes. MOQ is 1 piece. Single-unit emergency orders and bulk fleet purchases receive the same service commitment.
Q: Do you provide installation support?
A: Yes. We can supply torque values, relevant service manual sections, and installation guidance upon request.
Q: How is the part protected during shipping?
A: Vacuum-sealed in anti-rust film, packed in high-density foam, and secured in an ISPM-15 export-grade wooden crate.
Q: What payment methods do you accept?
A: T/T, XT, PayPal, and Western Union are standard. L/C options are available for larger repeat orders.
