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Home » Shop » Kubota KX121-3S

Kubota KX121-3S Replacement Hydraulic Cylinders and Parts

The Kubota KX121-3S is a mini excavator, a variant of the third-generation KX121-3. HCI carries the replacement hydraulic cylinders and parts to keep it working. Order by 12:00 PM CST for FASTSHIP same-day dispatch, with Buy Now, Pay Later at checkout. Explore the full Kubota lineup, and Demolish Downtime.

  • Replacement hydraulic thumb / bucket clamp cylinder for Kubota KX and U series excavators, replaces OEM 70091-00096

    Replacement Hydraulic Thumb, Bucket Clamp Cylinder for Kubota (PN: 70091-00096) Excavator Model Series KX and U

    SKU: 1247147409 Categories: Compact/Mini Excavator, Excavator, Replacement Welded Hydraulic Cylinders
    $1,470.00 In Stock
  • Replacement hydraulic arm cylinder for Kubota KX121-3 series excavators, replaces OEM RD118-67603, orange welded cylinder.

    Replacement Hydraulic Arm Cylinder for Kubota (PN: RD118-67603) Excavator Models KX121-3, KX121-3S, KX121-3ST

    SKU: 1020529831 Categories: Compact/Mini Excavator, Excavator, Replacement Welded Hydraulic Cylinders
    $3,350.00 In Stock
  • Replacement hydraulic bucket cylinder for Kubota KX121-3, KX121-3S, KX121-3ST excavators, replaces OEM RD118-67802.

    Replacement Hydraulic Bucket Cylinder for Kubota (PN: RD118-67802) Excavator Models KX121-3, KX121-3S, KX121-3ST

    SKU: 1020344901 Categories: Compact/Mini Excavator, Excavator, Replacement Welded Hydraulic Cylinders
    $2,400.00 In Stock
  • Replacement hydraulic blade angle cylinder for Kubota KX121-3 series excavators, replaces OEM RD118-74702.

    Replacement Hydraulic Blade Angle Cylinder for Kubota (PN: RD118-74702) Excavator Models KX121-3, KX121-3S, KX121-3ST, KX91-3S2, U35-S2

    SKU: 1028160221 Categories: Compact/Mini Excavator, Excavator, Replacement Welded Hydraulic Cylinders
    $2,350.00 In Stock
  • Kubota Boom Hydraulic Cylinder Replacement Seal Kit — PN RD118-71400 — Fits Compact Excavator KX121-3, KX121-3S

    Kubota Boom Hydraulic Cylinder Replacement Seal Kit — PN RD118-71400 — Fits Compact Excavator KX121-3, KX121-3S

    SKU: KUB-RD118-71400 Category: Seal Kits
    Bore: 3.35"
    Rod: 1.97"
    $245.00 In Stock
  • Replacement Kubota KX121-3 RD138-67500 Boom Cylinder

    Replacement Hydraulic Boom Cylinder for Kubota (PN: RD138-67500) Excavator Models KX121-3S, KX121-3ST

    SKU: 1019719274 Categories: Compact/Mini Excavator, Excavator, Replacement Welded Hydraulic Cylinders
    $3,000.00 In Stock
  • Replacement Swing Seal Kit for Kubota Model KX121-3

    Replacement Swing Seal Kit for Kubota Model KX121-3

    SKU: KUB-RD118-71270 Category: Seal Kits
    Bore: 3.15"
    Rod: 1.77"
    $145.00 In Stock
  • Replacement Angle Blade Seal Kit for Kubota Model KX121-3

    Replacement Angle Blade Seal Kit for Kubota Model KX121-3

    SKU: KUB-RD118-71350 Category: Seal Kits
    Rod: 2.17"
    Stroke: 1.18"
    $150.00 In Stock
  • Replacement hydraulic blade lift cylinder for Kubota KX121-3, KX121-3S and KX121-3ST excavators, replaces OEM RD118-75102.

    Replacement Hydraulic Blade Lift Cylinder for Kubota (PN: RD118-75102) Excavator Models KX121-3, KX121-3S, KX121-3ST

    SKU: 1021781073 Categories: Compact/Mini Excavator, Excavator, Replacement Welded Hydraulic Cylinders
    $1,330.00 In Stock
  • Replacement Swing-Seal Kit for Kubota Model KX121-3S

    Replacement Swing-Seal Kit for Kubota Model KX121-3S

    SKU: KUB-RD118-71270 Category: Seal Kits
    Bore: 3.15"
    Rod: 1.77"
    $245.00 In Stock
  • Kubota Bucket Hydraulic Cylinder Replacement Seal Kit — PN RD411-71820 — Fits Compact Excavator KX121-3, KX121-3S

    Kubota Bucket Hydraulic Cylinder Replacement Seal Kit — PN RD411-71820 — Fits Compact Excavator KX121-3, KX121-3S

    SKU: KUB-RD411-71820 Category: Seal Kits
    Bore: 2.76"
    Rod: 1.57"
    $215.00 In Stock
  • Kubota Blade Hydraulic Cylinder Replacement Seal Kit — PN RD118-71870 — Fits Compact Excavator KX121-3, KX121-3S

    Kubota Blade Hydraulic Cylinder Replacement Seal Kit — PN RD118-71870 — Fits Compact Excavator KX121-3, KX121-3S

    SKU: KUB-RD118-71870 Category: Seal Kits
    Rod: 3.74"
    Stroke: 2.17"
    $245.00 In Stock
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Kubota KX121-3S FAQ

The Kubota KX121-3S is a four-ton-class mini excavator used for digging, trenching, and loading on construction, landscaping, and utility jobs. It belongs to the -3 generation of Kubota’s KX excavator line, produced during the 2000s and early 2010s. HCI carries replacement hydraulic cylinders and parts to keep it working.

Every cylinder and part on this page lists its OEM cross-references, so you can match them against the numbers on your old unit. Still unsure? Call our team at 888-771-1894 to confirm fitment — have your serial or the number on the old cylinder ready — or browse the full Kubota catalog to find your model.

Any item that shows the FASTSHIP logo and is marked In Stock ships the same day when you order by 12:00 PM CST, Monday through Friday.

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