Oil Seal for Kubota L3940HST-3 L3940HSTC L3940HSTC-3 L4240DT/GST/HST L4240DT-3
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Oil Seal for Kubota
This oil seal is a replacement sealing component engineered to control lubricant leakage and keep debris out of critical tractor systems. It supports select Kubota models with reference numbers L3940HST-3, L3940HSTC, L3940HSTC-3, L4240DT/GST/HST, and L4240DT-3.
Overview
This oil seal for Kubota is designed to maintain a tight barrier around rotating shafts, preventing oil loss and reducing downtime. It fits a range of Grand L40 series and earlier models, delivering reliable sealing in rugged agricultural and loader applications. The oil seal for Kubota offers a cost-effective replacement for worn or leaking seals.
Built For Performance
- Reinforced steel outer case provides stable seating in the bore
- Spring-loaded sealing lip maintains contact under varying shaft speeds
- Oil-resistant elastomer handles transmission and hydraulic fluids
- Precise lip geometry reduces frictional heat generation
- Contaminant-exclusion design helps extend seal life
Fits These Machines
- for Kubota L3940HST-3
- for Kubota L3940HSTC
- for Kubota L3940HSTC-3
- for Kubota L4240DT
- for Kubota L4240GST
- for Kubota L4240HST
On-The-Job Use
- Commonly installed in rear axle hubs to seal wheel drive shafts
- Used in gearbox output shafts where rotational speed is high
- Applied in loader valve or pump connections to stop fluid seepage
Specs At A Glance
| Part Number(s) | L3940HST-3, L3940HSTC, L3940HSTC-3, L4240DT/GST/HST, L4240DT-3 |
| Seal Type | Spring-loaded radial oil seal |
| Material | Nitrile rubber with steel shell |
Good To Know
Q: What is the most common cause of oil seal failure? A: Dirt or debris scoring the sealing lip, or a worn shaft surface, are typical causes. Always inspect the shaft for grooves or corrosion before installing a new seal.
Q: Can this seal be reused after removal? A: No, seals should be replaced with new parts whenever the housing is opened. Reusing a seal risks immediate leakage and improper seating.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.