105x135x18mm Silicone Lip Rear Crankshaft Oil Seal OEM 6130-21-4231 for Komatsu S6D105 Engine
Model / SKU: VKEFOT-105-135-18-SIL
High-quality 105x135x18mm rear crankshaft oil seal with silicone lip, OEM 6130-21-4231, designed for Komatsu S6D105 diesel engine. High temperature resistant, leak-proof, in stock with worldwide shipping. Factory direct aftermarket parts for machinery MRO and wholesale buyers.
Tags: 105x135x18 oil seal, 6130-21-4231 crankshaft seal, silicone rear crankshaft oil seal, high temp engine oil seal, Komatsu S6D105 engine seal, construction machinery crankshaft seal
Product photos
Key specs: Inner diameter mm: 105 | Outer diameter mm: 135 | Height mm: 18 | Material: VMQ | Material: VMQ Silicone Lip + Green Metal Shell | Temp Range: -40℃~180℃ | OEM: 6130-21-4231 | Application: Komatsu S6D105 Engine Rear Crankshaft
- Inner diameter mm: 105
- Outer diameter mm: 135
- Height mm: 18
- Material: VMQ
- Material: VMQ Silicone Lip + Green Metal Shell
- Temp Range: -40℃~180℃
- OEM: 6130-21-4231
- Application: Komatsu S6D105 Engine Rear Crankshaft
- specifications: 105×135×18 mm
- Material: VMQ Silicone Lip + Green Metal Shell
- Temp Range: -40℃~180℃
- OEM: 6130-21-4231
Technical summary
Product specifications. Refer to the approved drawing for dimensional tolerances and installation requirements.
| Spec | Value |
|---|---|
| Material | VMQ Silicone Lip + Green Metal Shell |
| Temp Range | -40℃~180℃ |
| OEM | 6130-21-4231 |
| Application | Komatsu S6D105 Engine Rear Crankshaft |
| Size | 105×135×18 mm |
Pricing: request a quote (B2B / wholesale).
MOQ / commerce notes: MOQ: 100–5000pcs | Lead Time: 7–15 Working Days | In Stock & Fast Global Delivery
Product details
The 105x135x18mm high-temperature silicone rear crankshaft oil seal (OEM 6130-21-4231) is a premium aftermarket sealing solution specially engineered for Komatsu S6D105 construction machinery diesel engines. This heavy-duty crankshaft seal effectively solves common engine oil leakage problems at the rear crankshaft end, ensuring stable engine operation under high-temperature and high-load working conditions.
Core Product Advantages
Premium VMQ Silicone Sealing Lip
Adopts high-performance silicone material with excellent heat resistance, aging resistance and flexibility. It stably adapts to long-term high-temperature engine operation, effectively preventing oil leakage caused by rubber aging and hardening.Reinforced Green Painted Metal Shell
Integral rigid metal outer shell improves overall structural stability, ensures precise interference press-fit installation, avoids deformation under engine vibration, and maintains long-term sealing tightness.Dual-lip Leak-proof Structure
Elastic spring main lip tightly fits the crankshaft surface to lock engine oil inside the crankcase; auxiliary dust lip effectively blocks dust, sediment, moisture and external contaminants from entering the engine interior, protecting crankshaft bearings and engine core components.High Adaptability for Engineering Machinery
Perfectly matches the original installation size of Komatsu S6D105 engine rear crankshaft, suitable for engineering machinery overhaul, repair and daily MRO replacement.
Material Performance Parameters
- Sealing Material：VMQ Silicone (Silicone Rubber)
- Outer Shell：Anti-rust Green Painted Metal
- Continuous Working Temperature: -40°C to +180°C
- Applicable Medium: Conventional Diesel Engine Oil
- Feature：High temperature resistance, anti-aging, leak-proof, dust-proof
Application Scope
Widely used for Komatsu S6D105 diesel engine rear crankshaft sealing, applicable to various construction machinery equipment equipped with S6D105 engine. Ideal for machinery repair shops, engineering fleet maintenance, parts wholesalers and global MRO procurement.
Installation Guidelines
- Thoroughly clean the crankshaft mounting surface and housing bore to remove rust, burrs and residual impurities.
- Lubricate the silicone sealing lip with clean engine oil before installation; dry installation is strictly prohibited.
- Keep the oil seal perpendicular to the crankshaft, press evenly with a professional installation tool.
- Do not strike the silicone lip directly to avoid sealing damage.
- Rotate the crankshaft manually after installation to confirm smooth operation without jamming.
Packaging & Global Supply Support
Standard export neutral packaging, carton bulk packing. In stock support global shipping, fast delivery. Custom packaging and batch OEM services are available. All products can provide formal quotation, inspection documents and after-sales warranty support for global buyers.
FAQ
I only have a competitor/OEM part number—can you cross-reference?
Yes. Send the reference PN, ID×OD×height in mm, and duty (media, temperature, pressure, speed). We match equivalents in the catalog; the Cross Reference page also searches by keyword. Final selection follows drawing and duty confirmation — do not order from a photo alone.
Do you support OEM/ODM, private packing and marking?
Yes — OEM/ODM from drawings or samples, plus agreed packing and marking. Share target-market compliance needs and annual volume; RFQ confirms process, tooling cost and cadence. VKEFOT is the export brand of the Xingtai factory, not a trading desk.
TC vs TB oil seal: which should I specify?
For a rotary shaft that needs a dust lip plus oil lip, start with TC (rubber-covered dual-lip is common); TB is typical when a semi-metal case needs a stiffer bore fit. Shaft diameter, housing, runout and dust still decide. Send ID×OD×height in mm and speed on the RFQ — not only a competitor photo.
NBR vs FKM oil seal for hot engine oil?
Continuous engine-oil duty near 120°C or fuel exposure should be reviewed as FKM; general mineral oil at moderate temperature and cost-sensitive repair jobs often stay NBR. Brown color is not proof of FKM. The quote names the grade and temperature limit — do not order by color.
Oil seal vs O-ring: when do I use which?
Use a metal-cased radial shaft (skeleton) oil seal for rotating shafts; use an O-ring for static glands or reciprocating grooves. An O-ring on a rotary shaft wears out quickly. VKEFOT makes both — state motion type (rotary/static/reciprocating) and ID×OD×section on the RFQ.
Cassette seal vs dual-lip TC for dusty construction equipment?
Ag gearboxes and construction travel shafts with mud and long service intervals should be reviewed as cassette/combined seals; many automotive hub repair jobs stay dual-lip TC. Cassette packs are thicker and need different bore and axial space. A job-site photo is not enough — send ID×OD×height.
Xingtai oil seal factory vs trading company — how do I tell?
VKEFOT is the export brand of Xingtai Hanchi Intelligent Technology Co., Ltd. Mixing, vulcanization and outgoing inspection run in Xingtai, then goods export to Europe, North America, the Middle East and Southeast Asia. A trading desk usually cannot change compound or cut tooling. For OEM drawings, ask who runs the process and QC — not only catalog price.
What is a skeleton / radial shaft oil seal?
A skeleton oil seal is a metal-cased radial shaft seal: the rubber lip rides the shaft and the case holds interference in the bore. Common styles include TC, TB and TA. Minimum spec is ID×OD×height in mm, compound and duty. VKEFOT catalogs automotive and industrial shaft seals; trust the product-page dimensions.
What do ID, OD and height mean on an oil seal RFQ?
ID is inside diameter (shaft), OD is outside diameter (bore), height is axial width, all in millimetres. Missing any one blocks a cross-reference. Example: 56×112×8/10 means 56 mm ID, 112 mm OD, 8/10 mm height. Put those three numbers and the compound on the RFQ.
Which oil seal for an automotive wheel hub or differential pinion?
Hub repair jobs often use dual-lip TC; differential pinion shafts often need a secondary lip or split height (e.g. 8/10 or 12/22 mm). Use measured or OEM dimensions — not a marketplace title. VKEFOT application pages cover drivetrains and hubs; send an OEM number or ID×OD×height on the RFQ.
How to select oil seals for ag gearbox and PTO shafts?
Ag gearboxes and PTO shafts see dust and shock — prefer a dust lip or cassette, with NBR or FKM matched to gear oil and temperature. Do not force a passenger-car hub seal onto a PTO shaft. Send shaft, bore, height and whether mud/water is present, then RFQ.
What matters for pump, valve and compressor shaft seals?
Match media (oil, water, gas) and temperature first, then lip style and compound; do not default to cheap NBR for high speed or dry running. Put shaft runout and eccentricity on the RFQ. VKEFOT application cases include pumps, valves and compressors — still use measured sizes.
Does a brown oil seal mean it is FKM?
No. Brown NBR is common; color is not proof of FKM. For heat or fuel duty, write temperature and media on the RFQ so the factory names the grade. Ordering by color is a frequent cause of early leak.
Can you quote an oil seal from a photo only?
Not as a firm quote. We need at least ID×OD×height in mm, ideally compound and speed. A photo can show lip count and case style; it does not replace dimensions. Incomplete RFQs get a request for those three numbers before price.
If a new oil seal leaks quickly, is it always a bad seal?
Not always. Rough shaft finish, runout, cocked installation or the wrong compound also leak early. Check size and media/temperature match before blaming the part, then inspect the journal. Note time-to-fail (e.g. 50 hours) on the RFQ so we diagnose — do not just buy a cheaper seal.
What is needed for private-label OEM packing of oil seals?
Private packing and marking need annual volume, target-market compliance and artwork; tooling cost and cadence are confirmed on the RFQ — not a one-line “please OEM”. VKEFOT runs OEM/ODM after drawings or samples are complete.
Who is VKEFOT and how does it relate to Xingtai Hanchi?
VKEFOT manufactures oil seals, O-rings and custom rubber seals in Xingtai and exports to Europe, North America, Middle East and Southeast Asia. The manufacturer is Xingtai Hanchi Intelligent Technology Co., Ltd. Use this wording on quotes and certificates — do not invent alternate spellings of the brand.
What is 105x135x18mm oil seal OEM 6130-21-4231 used for?
This 105x135x18mm VMQ silicone rear crankshaft oil seal with OEM number 6130-21-4231 is specially used for rear crankshaft sealing of Komatsu S6D105 construction machinery diesel engine, preventing engine oil leakage and external dust ingress.
Which engine does OEM 6130-21-4231 oil seal fit?
The OEM 6130-21-4231 crankshaft oil seal perfectly matches Komatsu S6D105 diesel engine, widely applied in Komatsu construction machinery equipment.
What material is 6130-21-4231 rear crankshaft seal?
This engine oil seal adopts high-performance VMQ silicone rubber sealing lip and anti-rust green painted metal outer shell, featuring high temperature resistance and aging resistance.