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Description
4237 649 0301 STIHL Grease Seal – Genuine OEM Gear Head Part
The STIHL Grease Seal (4237 649 0301) is a genuine OEM gearbox sealing component designed to retain lubrication and protect internal gear head assemblies on select STIHL hedge trimmers and battery-powered hedge trimmer models. This seal plays a critical role in preventing grease leakage while keeping dirt, moisture, and debris out of the gear housing.
Over time, grease seals can wear, harden, or become damaged due to heat, vibration, extended use, or contamination. A failing seal may cause grease loss, increased gearbox friction, overheating, or premature gear wear. Replacing it with the correct OEM part helps restore proper lubrication containment without replacing the entire gear head assembly.
Manufactured to STIHL factory specifications, this genuine grease seal ensures correct fitment, secure sealing, and long-term reliability under demanding cutting conditions.
Product Details
OEM Part Number: 4237 649 0301
Brand: STIHL (Genuine OEM)
Part Type: Grease Seal
Application: Gear head lubrication sealing system
Condition: New Genuine OEM Part
Function
This STIHL grease seal is designed to:
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Retain grease inside the gear head assembly
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Prevent lubricant leakage during operation
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Protect gears from dirt, moisture, and contamination
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Replace worn or leaking gearbox seals
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Support long-term gear head performance and durability
⚠️ A damaged grease seal can cause lubrication loss, overheating, and premature gearbox failure.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4237 649 0301
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Your unit model matches those listed below
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Application matches your STIHL illustrated parts diagram
⚠️ Gear head seals are model-specific — always verify by OEM part number and gearbox configuration.
Compatibility
This OEM grease seal fits select STIHL hedge trimmers and battery hedge trimmers equipped with specific gear head assemblies, including:
Gas Hedge Trimmers
HS 81 T (Gear head HS 81 T, 86 T)
HS 81 TC-E (Gear head HS 81 T, 86 T)
HS 82 T (Gear head HS 82 T, 87 T)
HS 86 T (Gear head HS 81 T, 86 T)
HS 87 T (Gear head HS 82 T, 87 T)
Battery Hedge Trimmers
HSA 94 T (Gear head HSA 94 T)
HSA 130.0 T (Gear head HSA 94 T)
HSA 140.0 T (Gear head, Electric motor)
HSA 150.0 T (Gear head, Electric motor)
(Exact fitment depends on production version — always verify using OEM parts diagram.)
Installation Notes
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Disconnect spark plug or remove battery before service
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Access gear head housing assembly
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Remove blade components as required
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Carefully remove worn grease seal without damaging housing
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Install new seal with correct seating and orientation
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Repack gearbox with STIHL-approved grease if needed
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Reassemble and test for smooth operation
⚠️ Gearbox sealing service should be performed by a qualified technician to ensure proper lubrication and alignment.
Maintenance Tips
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Inspect gear head regularly for grease leaks
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Maintain proper gearbox lubrication at recommended intervals
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Replace seals during gearbox rebuilds or service
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Keep cutter bar assembly clean to reduce contamination
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Always use genuine STIHL OEM sealing components for correct fit and durability
