The floating seal SA7117-30120 is a critical component in Volvo excavator final drives and travel gearboxes. Its purpose is to keep oil inside the drive while keeping dirt, water, and other contaminants out. Failure of this seal can quickly lead to oil loss, bearing damage, and expensive downtime.
Volvo Excavator Models Using SA7117-30120
This seal is fitted to a range of Volvo excavators, including:
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EC140
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EC140B
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EC150
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EC160B
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EC180B
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EC210
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EC210B
These models all rely on SA7117-30120 in the final drive / travel gearbox assembly.
Cross Reference Numbers
The floating seal SA7117-30120 may also appear under alternative or supplier reference numbers, including:
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SA7 117-30120
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711730120
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110-30-00085 (some Komatsu cross-references)
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110-30-00045 (some Komatsu cross-references)
Always confirm dimensions and fitment before using non-Volvo references, as similar seals may vary in size.
Final Drive & Travel Gearbox Applications
The SA7117-30120 floating seal is used in the final drive assemblies of the above Volvo excavators. Each final drive has two floating seals — one on each side — working with metal sealing rings to create a durable oil barrier.
When rebuilding or servicing a final drive, SA7117-30120 should be replaced along with bearings and gaskets to ensure full reliability.
Key Notes:
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Located in the travel gearbox / planetary hub.
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Works as a matched pair of seals and rings.
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Critical for keeping lubricating oil in place under high load.
Confirming Fitment
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Check the machine serial number (SER NO) – Volvo often updates drive assemblies within the same model range.
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Measure the old seal – Verify outer diameter, inner diameter, and thickness.
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Match part numbers – Use SA7117-30120 as the primary reference; cross-check with final drive assembly numbers.
Why Order From Pro Construction Parts
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Direct replacements for Volvo OEM part numbers.
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Quality-checked parts built to match or exceed factory standards.
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Stock availability for quick shipping and reduced downtime.
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Support team ready to confirm fitment against your model and serial number.
Final Word
If you run or maintain Volvo EC140 through EC210 series excavators, the floating seal SA7117-30120 is an essential replacement item to keep in stock. It’s a small part that protects one of the most expensive components on your machine — the final drive.
