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Oil Sealing
We specialize in aftermarket seal kits compatible with brands such as Caterpillar, Komatsu, JCB, and John Deere. We offer B2B bulk order consultation and large-scale procurement services. With years of industry experience, we provide wholesale and long-term bulk supply services to our global business partners. Submit your bulk order details, and our professional B2B team will provide you with competitive pricing, fast delivery times, and customized supply solutions within 24 hours.
6I-2431 is an aftermarket radiator core seal for selected Caterpillar cooling-system assemblies. It is a 160 mm EPDM rubber seal installed between the radiator core and the lower radiator tank; it is not a hydraulic cylinder, pump, or engine oil seal. A damaged seal can allow coolant leakage at the core-to-tank joint, so match the original reference and radiator arrangement before ordering. Caterpillar lists this part across selected dozers, wheel loaders, wheel dozers, trucks, compactors, pipelayers, and mining equipment. The original 6I-2431 reference is sufficient for direct replacement quotation.
Part Number: 6I-2431
Fits Models: D6R, D6R II, D6R III, D6T, D7R, D7R II, D7R Series, D8 GC, D8GC, D8L, D8N, D8R, D8R II, D8T, D9N, D9R, D9T, D10N, D10R, D10T, D11R
Brand: Caterpillar replacement
Type: Radiator Core-to-Lower Tank Seal
Application:
System: Engine cooling system / radiator assembly
Function: Seals the joint between the radiator core and lower radiator tank to help prevent coolant leakage.
Track-Type Tractors: D6R, D6R II, D6R III, D6T, D7R, D7R II, D7R Series, D8 GC, D8GC, D8L, D8N, D8R, D8R II, D8T, D9N, D9R, D9T, D10N, D10R, D10T, D11R
Wheel Loaders: 950G II, 962G II, 966G II, 972G II, 980G, 980G II, 988G, 988H, 988K, 990, 990 II, 990H, 992G, 992K, 993, 993K, 994D, 994F, 994H
Wheel Dozers: 814F, 814F II, 824C, 824G II, 824H, 834G, 834H, 834K, 844, 844H, 854G, 854K
Wheel Tractors: 621G, 623G, 627G, 631D, 631G, 633D, 637D, 637G, 639D
Pipelayers: 572R, 572R II, 583R, 583T, 587R, 587T, PL83, PL87
Landfill Compactors: 816F, 816F II, 826C, 826G II, 826H, 836G, 836H, 836K
Soil Compactors: 815F, 815F II, 825C, 825G II, 825H
Other Equipment: 5110B Mining Excavator, 769D Truck, 771D Quarry Truck, 24H Motor Grader, MD6380 Rotary Drill, 3508B Genset, 657 and 657B Wheel Scrapers
Size: Standard Size
Q: What is 6I-2431 used for?
A: It seals the connection between the radiator core and the lower radiator tank in selected Caterpillar cooling-system assemblies.
Q: Is 6I-2431 a hydraulic oil seal or cylinder repair kit?
A: No. It is a radiator cooling-system seal. It should not be used as a replacement for a hydraulic cylinder, pump, motor, or transmission seal.
Q: Is 6I-2431 the same as 323-5917?
A: Both references are associated with 160 mm radiator cooling-system seals, but official specifications differ. Confirm the original part number and radiator arrangement instead of treating them as automatic 1:1 replacements.
Q: Can distributors request a quotation by part number only?
A: Yes. Send 6I-2431 and the required quantity for direct replacement matching. A multi-part purchasing list can also be submitted for consolidated support.
Our aftermarket seal kits deliver a practical, cost-effective solution without compromising on real-world performance. We offer a lower upfront cost and reliable sealing for your daily maintenance and repair needs.
We stock seal kits across CAT, Komatsu, Volvo, JCB, Hitachi, Doosan, John Deere, Kubota, and 10+ other brands—one supplier for your whole fleet.
Ship under RuijueParts branding, neutral (unbranded) packaging, or your own private label. Suitable for resellers and distributors.
When genuine OEM seals are out of production for your old machinery, we can custom-make oil seals using your dimensions or our engineer-recommended specifications.
Ship under RuijueParts branding, neutral (unbranded) packaging, or your own private label. Suitable for resellers and distributors.
Volume pricing for repair shops, dealers, and fleet operators. Get a quote via our website or WhatsApp: +86 13692100161.
OEM seal kits are the right choice when machinery is under active warranty, operating at peak duty cycles, or when failure risk is unacceptably high. Budget aftermarket—like Ruijue Parts—makes sense in these common scenarios:
When a machine is aging out of your fleet, OEM parts cost more than the job warrants. A budget kit extends service life without over-investing.
For machines used infrequently or on lower-intensity tasks, premium OEM pricing may not be justified.
When OEM stock is out or delivery takes weeks, an available aftermarket kit gets your machine running now.
Repair shops and fleet managers running high volumes of machines often balance OEM and aftermarket across their portfolio based on criticality.
Fully retract the cylinder and relieve system pressure before disassembly. Never work on a pressurized circuit.
Remove from the machine. Unthread the gland nut and withdraw the piston rod carefully to avoid surface damage.
Clean the bore, rod, and all metal parts with a lint-free cloth. Contamination introduced during reassembly accelerates seal wear—this step is especially important for budget-grade seals.
Check for scoring or pitting. Budget seals are more sensitive to surface imperfections—address rod damage before fitting new seals.
Lightly coat each seal with clean hydraulic fluid before installation. Use proper seal drivers — not screwdrivers or sharp tools — to avoid nicking the sealing lip.
Torque the gland nut to spec and cycle the hydraulic system under no-load conditions. Inspect for leaks before returning the machine to service.
Budget-grade seals may have shorter service intervals than OEM. Inspect rod seals for moisture, oil film, or weeping more frequently and replace proactively.
Contaminated fluid degrades seals faster — this applies especially to non-OEM materials. Replace fluid and filters on schedule.
When storing equipment with cylinders extended, protect rod surfaces from corrosion and debris to preserve wiper seal life.
Avoid using sharp tools during assembly to prevent nicks or scores on the seal lips. Pre-lubricating all components with clean hydraulic oil is recommended to ensure a smooth fit into the cylinder grooves.
Click "Add to Cart" for immediate dispatch, or contact our team for bulk pricing and wholesale support.
First order was a pleasant surprise-
great value for money.
Good! The 101529-00005 seal kit
performed exceptionally. No oil leaks,smooth operation.
Fast delivery and exactly as described.Highly recommend!
Seals fit well and arrived on time.
Good quality for the price.
