Maikeyier supplies combine harvester oil seals for agricultural machinery maintenance, repair, and replacement. We provide sealing solutions for engine systems, gearboxes, HST and hydraulic systems, undercarriage running components, and other rotating shaft applications. A tracked harvester typically has 60–100 oil seals throughout the machine. Whether you need standard rotary shaft oil seals or model-specific seals, we can assist with product identification, specification matching, and bulk order supply.
Harvester Characteristics
combine harvester oil seals is a sealing component used to prevent lubricating oil or grease from leaking around a rotating shaft, while also preventing dust, impurities, and other contaminants from entering the mechanical assembly. Oil seals are used extensively on harvesters — almost anywhere there is “rotation + liquid/grease.”
Combine Harvester Oil Seals Structure
- Metal case / Outer iron — Provides rigidity and interference press-fit
- Sealing lip (primary lip) — Dynamic sealing surface in contact with the rotating shaft
- Dust lip (secondary lip) — Blocks contamination from the outside
- Spring (garter spring) — Ensures radial pressure of the lip against the shaft
- Outer circumference — Static sealing with the housing bore
Where Are Oil Seals Used on a Harvester?
- Track roller: Both ends of the shaft
- Carrier roller: Both ends of the shaft
- Idler wheel / tension wheel: Both ends of the shaft + floating seal
- Drive sprocket: Shaft end
- Track tensioning hydraulic cylinder: Piston rod
- Engine: Front and rear crankshaft, camshaft
- Hydraulic cylinder: Header lift, reel lift, unloading auger
- Threshing drum: Main shaft
What Do Oil Seals Do?
- Prevent lubricating oil (grease) leakage: Maintain the required oil level in bearing cavities, gear cavities, hydraulic systems, and engine interiors.
- Block external contaminants: Prevent mud, water, dust, and straw debris from entering moving pairs.
- Maintain system pressure: Critical for hydraulic cylinders and hydraulic pumps to hold pressure.
- Reduce wear of moving pairs: Avoid abrasive wear of shafts, bearings, and bushings.
- Extend the life of expensive components: One failed oil seal can burn out a pair of bearings or a hydraulic pump; timely oil seal replacement avoids greater losses.
Maikeyier Combine Harvester Oil Seals for Sale
Different applications require different sealing structures. Maikeyier can help customers identify suitable products based on drawings, dimensions, OEM part numbers, or sample requirements.
| Product Type | Typical Application |
| Rotary Shaft Oil Seal | Engine, gearbox, rotating shaft |
| Engine Oil Seal | Engine shaft sealing positions |
| Transmission Oil Seal | Gearbox and drive shaft |
| Hydraulic Shaft Seal | Hydraulic pumps and motors (if specified) |
| Floating Seal / Duo-Cone Seal | Selected heavy-duty wheel bodies and undercarriage assemblies |
| O-Ring | Static and selected dynamic sealing applications |
Maikeyier Popular Types for Sale
- SC Type — Single lip, rubber OD, suitable for low-pressure environments
- TC Type — Double lip with dust protection, NBR or FKM material, general-purpose
- TB Type — With metal case, heavy-duty, for high-pressure rotating shafts
- TCV Type — Double metal case, strong contamination resistance
- VA / VS Type — Cassette seal structure, designed specifically for extreme mud and water environments
- Cassette Seal — Integrated sealing system, commonly used in high-end track rollers
Oil seals, hydraulic seals, floating seals, and O-rings belong to different product categories. Many customers confuse these four types. Pay attention to the distinction when purchasing harvester parts.
| Component | Application | Function | Typical Harvester Application |
| Oil Seal | Rotating shaft | Dynamic sealing + dust protection | Track roller, engine, hydraulic pump |
| O-Ring | Static or slow reciprocating | Static sealing of housing/flange | Hydraulic valve blocks, cylinder end caps |
| Gasket | Flat static joint surface | Sealing between two flat surfaces | Engine cylinder head, oil pan, gearbox cover |
| Wiper Seal / Scraper Ring | Outside of dynamic joint | Dust protection only, not primary sealing | Hydraulic cylinder piston rod, track roller outer side |
Why Choose Maikeyier for Combine Harvester Oil Seals?
Maikeyier specializes in agricultural machinery parts, including harvester wear parts, forgings, and related replacement parts. Our products cover complete machine seals for harvester track undercarriage, hydraulics, and engines, primarily serving agricultural parts wholesalers, dealers, retailers, and importers.
Manufacturing + Supply Chain
Our in-house forging manufacturing capability is supported by an integrated agricultural parts supply chain. This enables us to support customers seeking manufactured components and multi-category replacement parts. We provide one-stop service for purchasers of Kubota, Yanmar, Lovol, and FMWorld agricultural parts.
- Track rollers and idler wheels
- Drive sprockets and track guides
- Gearboxes and transmission components
- Belts and chains
- Bearings and hardware
- Hydraulic and engine components
- Other harvester wear parts
Supported Order Types
SC, TC, TB, TCV, VA, VS, and cassette seals — all types available. Quotation within 24 hours, shipment within 7–10 working days after order confirmation. You can complete whole-machine procurement at Maikeyier.
- Replacement Parts
- Aftermarket Parts
- OEM Reference Matching
- Wholesale Orders
- Mixed Orders
- Model-Based Supply
- Bulk Container Supply
Available Supply List
- Track roller oil seal
- Carrier roller oil seal
- Idler wheel oil seal
- Drive sprocket oil seal
- Track tensioning cylinder seal
- Engine crankshaft oil seal
- Engine camshaft oil seal
- Hydraulic cylinder seal kit
- Hydraulic pump seal kit
- Gearbox seal kit
Combine Harvester Oil Seals FAQ
We have established cooperation with agricultural parts wholesalers, importers, dealers, brand agents, and repair businesses in 20+ countries worldwide. Our product quality and delivery have been widely recognized by customers! Leave us a message with the harvester oil seal part number, machine brand and model, seal dimensions, or a clear photo of the old seal to get a free quotation!