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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.
4660834 is an aftermarket hydraulic cylinder seal kit for selected Hitachi large mining excavators. Verified catalogue records place it in EX3600-6 and EX3600E-6LD boom-cylinder groups, plus selected EX5500 arm/stick-cylinder groups. “Loader” or “front shovel” in some catalogues describes the excavator front attachment arrangement, not a wheel loader. Quote original part number 4660834 and the cylinder position for a reliable match. Ruijueparts supports part-number lookup, multi-SKU RFQs, plus neutral or customer-specified packaging.
Part Number: 4660834
Fits Models: EX3600-6, EX3600E-6LD, EX5500, EX5500-5, EX5500E-6
Brand: HITACHI replacement
Type: Hydraulic Cylinder Seal Kit / Boom Cylinder Seal Kit
Application:
Equipment: Large Mining Excavator / Mining Shovel
Cylinder Position: Boom Cylinder or selected Arm/Stick Cylinder
Mining Excavators: EX3600-6, EX3600E-6LD, EX5500, EX5500-5, EX5500E-6
Size: Standard Size
Q1: Is 4660834 for a mining excavator or a wheel loader?
A: It is for selected Hitachi mining excavator applications. Some catalogue records say “loader” because the excavator uses a loader/front-shovel attachment arrangement; it does not mean a wheel loader.
Q2: Is 4660834 a boom cylinder or an arm cylinder seal kit?
A: Both references occur in verified catalogues. It is listed for boom cylinders on selected EX3600 configurations and for arm/stick cylinders on selected EX5500 configurations. Match the cylinder location to the machine configuration.
Q3: Is 4660834 a bucket or level cylinder seal kit?
A: No verified catalogue evidence supports presenting it as a general bucket or level cylinder kit. Use the boom and arm/stick application description instead.
Q4: Do I need to provide machine details if I have original part number 4660834?
A: The original part number is the primary reference for matching. Providing the machine model and cylinder position is useful only when you need an additional application check or have a special front attachment configuration.
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.
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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.
