ranroswang@hksparkling.com 
+86 138 2341 8469
RB511-64514 Hydraulic Oil Cooler for Kubota U25S Compact Excavator
Function: It sits within the cooling pack alongside the radiator, radiating heat from the hydraulic fluid using ambient air blown by the engine fan before the oil flows back into the tank.
Part Details & Specifications
· Component Type: Air-Cooled Hydraulic Oil Cooler Core.
· Machine Compatibility: Specifically designed for the Kubota U25S compact excavator.
· Serial Number Specifics: This cooler fits machines with Serial Number 30893 and above.
· Note: If your mini excavator has a serial number of 30892 or lower, you require part number RB511-64513 instead.
Dear Valued Partners,
Thank you for choosing SPARKLING MACHINERY.
The SPARKLING MACHINERY NEW RB511-64514 Oil Cooler Photo:
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- Compact Plate-Fin Design: Maximizes the surface area for cooling while fitting perfectly within the tight enclosure of the U25S.
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- High-Strength Aluminum Construction: Offers excellent thermal conductivity and is brazed for maximum durability against vibration and pressure spikes.
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- Corrosion Resistance: The exterior is often treated to withstand the dust, mud, and moisture common in excavation jobsites.
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- Precision Porting: Matches the factory inlet and outlet configurations for the RB511-64514, ensuring a leak-free "drop-in" installation.
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Compatible Models
This part is specifically designed for the Kubota U-Series:
Machine Type Models Compact Excavator U25S, U25-3S Engine Compatibility Kubota D1105-series Diesel Engines
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Q&A
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Q1: How can I tell if my RB511-64514 oil cooler is failing?
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A: Common indicators include the machine losing power as it gets hot (fading hydraulics), an overheating warning lamp on the digital panel, or visible oil leaks around the cooling stack.
Q2: Does the U25S use a combined radiator and oil cooler?
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A: On many U25S configurations, the oil cooler is mounted alongside or directly in front of the radiator. While they work together, they are typically distinct components. Ensure you are replacing the correct unit by verifying the part number RB511-64514.
Q3: Can I clean this cooler if it is clogged?
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A: External cleaning with low-pressure air or water is recommended to remove dust and debris. However, if the internal passages are "lacquered" or restricted due to contaminated hydraulic fluid, the unit must be replaced to restore proper flow and cooling.
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📦 Packing
1. Packaging methods: Carton box + Wooden case/Pallet + Anti-rust treatment
2. Export-standard packaging to ensure safety during transportation
3. Custom packaging available upon request
4. Dimensions and weight can be provided for freight calculation
🚚 Shipping
1. Available shipping methods: Sea freight, Air freight, Express delivery (DHL, UPS, FedEx, etc.)
2. LCL (Less than Container Load) and FCL (Full Container Load) options are supported
3. For Russian clients, we can introduce the forwarder agent to you
4. Delivery time: Ships within 1-3 working days after payment (for items in stock)
💳 Payment
1. Accepted methods: T/T, Bank Transfer, PayPal, Alipay, WeChat Pay, Western Union
2. Deposit + balance payment available for large or custom orders
3. Flexible payment options—feel free to contact us for details
📌 Frequently Asked Questions (FAQs)
Q: Which excavator models is this part compatible with?
A: This product is compatible with major brands such as CAT, KOMATSU, HITACHI, and more. Custom specifications are also available.
Q: How can I make sure I’m selecting the correct part?
A: You can send us a photo of the old part, part number, or your excavator model, and we will help you confirm the right match.
Q: Is there a warranty for this product?
A: Yes, we offer a 6-month quality guarantee under normal use.
Get a free quote
We are committed to producing the highest quality products at the most competitive prices. Therefore, we sincerely invite all interested companies to contact us for more information.
Contact us
Email: ranroswang@hksparkling.com
Wechat: +86 136 0901 0879
Skype: foreverlucia1
WhatsApp: +86 136 0901 0879
Address: No. 514-515, Hulin Road, Tianhe District, Guangzhou, China.
Sparkling Machinery Co.,Ltd
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Whatsapp: +8613609010879