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2" Cylinder Seal Kit (1.25" Shaft)

  • $24.26
  • or

Koyker OEM Cylinder Part 662051

2" Cylinder Packing Seal Kit works with certain Koyker front-end loaders. Complete kit with all seals needed to service (1) 2” cylinder.

  • Seal kits DO NOT work on other brands of loaders or products.
  • Seal kits are manufactured specifically to fit Koyker front-end loaders.

NOTE: This product does not qualify for returns. Confirm correct seal kit by comparing pictures, checking owner's manual AND by measuring the inside diameter of the barrel cylinder tube and chrome shaft rod weldment.

This kit includes the following pieces:

Part Number: K662051

  • (1) 2" Gland "O" Ring
  • (1) 2" Backup Ring
  • (1) 1 1/4" U-Cup Rod Seal
  • (1) 1 1/4" Rod Wiper
  • (2) 2" U-Cup Piston Seals
  • (1) 3/4" Rod "O" Ring
  • (1) 3/4" Lock Nut

Related Products:

K663310: 2” Cylinder Gland with Packing
K663311: 2” Cylinder Piston with Packing

Loader Models:

Koyker Loader 145 (Loader may also utilize 1.75" Cylinder Seal Kit)
Koyker Loader 155 (Loader may also utilize 1.75" Cylinder Seal Kit)
Koyker Loader 160 (Loader may also utilize 1.75" Cylinder Seal Kit)
Koyker Loader 165 (Loader may also utilize 1.75" Cylinder Seal Kit)
Koyker Loader 195 (Loader may also utilize 2.25" Cylinder Seal Kit)

Download Koyker Loader Manuals

This product does not qualify for returns. Please make sure this product is the correct size and will work for your equipment before purchasing.

Your equipment may consist of NON-OEM parts and may not coincide with product manuals. If you have questions or concerns, please contact our Koyker Customer Service Team at 1-800-456-1107.


Periodically check all hydraulic system connections to insure a leak-free condition. Also, be certain to maintain proper fluid levels in the tractor hydraulic system as in accordance with the method and frequency recommended in the tractor operator’s manual. Use only hydraulic fluids recommended for your tractor hydraulic system by the manufacturer.

Keep hydraulic system clean. Be certain to maintain recommended oil filter service intervals. All internal surfaces of the hydraulic system on your loader have been factory cleaned, inspected, and plugged with protective caps prior to shipment. Be certain all protective caps are securely in place until hydraulic system assembly is completed.

Care must be taken with your loader cylinders. Nicks, scratches, rust or other shaft damage can cause seal damage resulting in cylinder leakage and poor performance.

Read these service tips before beginning assembly of cylinder gland or piston.

  1. Keep seals clean from the time they are removed from package until they are installed.
  2. Clean the groove or bore into which the seal is to be fitted before installing the seal.
  3. Never touch the seal lip in handling. Always pick up the seal by its outer member.
  4. Inspect each seal lip carefully for nicks, scratches, and dirt at time of installation. If dirty, use a soft, clean cloth and carefully wipe off seal. DO NOT wipe seal with fingers as this only imbeds dirt in the seal.

Never clean rubber related seals with a mineral based solvent! Clean rubber seals in denatured alcohol or non-mineral based solvents only.

Seals can be made more pliable and easier to install, if first heated in hydraulic oil to 160 degrees F. Never use direct heat on any seals.

We try our best to ship orders in the timeliest manner possible. Each product may have a different level of manufacturing demand and timeframe for shipment.

Shipping Rates

We offer calculated shipping rates during the checkout process. USPS, UPS & FedEx services are available if the product ordered qualifies for those options.

Order Processing

Business Days: Monday-Thursday.
Holidays, Fridays, Saturdays and Sundays are not included in processing days.

If you have any questions or concerns about your order's status, please email us at to discuss.

International Orders

Customers are responsible for any brokerage fees incurred on shipping. Sioux Steel Company cannot calculate these fees.


Products on this website do not qualify for returns. We understand this may cause you concern....

We are here to help!

Our customer service team is available Monday-Friday, 8am to 5pm CST to discuss the parts in question PRIOR to placing your order.

Call us toll free at 1-800-557-4689 to talk and confirm your parts needed.

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NOTE: All product specifications are subject to change or improvement without notice. We reserve the right to change product pricing at any time without further notice. Pricing may differ at the time of purchase.

Contact Sioux Steel by emailing or by calling our customer service specialists at 1-800-557-4689 for additional information.

SIOUX STEEL COMPANY FOUNDATION: 2% of the total sales dollars from this website are donated to the Leukemia and Lymphoma Society. Beating cancer is in our blood.

Customer Reviews

Based on 27 reviews
Devon H.
2" Cylinder Seal Kit

Parts were correct for my Koyker 160 2" lift cylinders. Youtube video of piston seal install was helpful.

Duke Maeder

super helpful, quick shipping and everything fit perfect

Don Wickham
Cylinder rebuild kit

Great quality product! Installed it and no leaks. Definitely would buy again.


Exact fit great parts

Pasquale G.
rebuild kit

Quality and accurate parts. Was a real pleasure.
Thank you

Thanks for the feedback!

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Ask a Question
  • I have a Koyker 160 loader and I need to replace the seals on the cylinder shafts. Will this kit work. I believe that the shaft is 1.25”. Any help will be great. Thank you

    Thank you for reaching out! Yes, K662051 is the correct kit for your loader. Thank you.

  • I have a koyker 110 loader with 2" cylinders. Will the k662051 packing kit fut my lift and tilt cylinders?

    Yes, K662051 is the correct cylinder seal kit for the Koyker 110 loader with 2" cylinders. Thank you.

  • Looking for seal kit for an AW25515 loader lift cylinder. The bucket and lift cylinders are all the same number. Cylinder is on a John Deere 80 Loader.

    Thank you for reaching out! Our seal kits are manufactured to be used with Koyker & Legend loaders. They are not designed to fit loaders for other manufacturers.

  • I have a Koyker 100 Loader. I need a Grand Cylinder kit. Kit # 4D, as stated in my owner's manual #654523. The cylinder is a 2X17, part # 653900. Can you help? I look forward to your reply. Think You

    Greetings! We would suggest utilizing the seal kit K662051.

  • I have a K5 loader and need the lift cylinder kit. Will this work or what is the part number for a rebuild kit?

    Thank you for reaching out!
    This pertains to all K models of loaders: K1, K2, K4, K6 and SuperK.

    1. If you have the gland with the sides ground off (for a pipe wrench or adjustable wrench) - this kit will work.
    2. If you have the spanner wrench style (with 2 holes in the end of gland for spanner pegs) – need new updated gland and piston assy.   
      Note: Both cylinders should be updated
    3. If you have a snap ring holding the gland in place, we have no replacement seals. - Must buy complete new cylinders
    If you have any further questions, please feel free to reach out to our Koyker customer service team at 1-800-456-1107.

  • my Koyker K1 loader manual shows a Kit No. 1D to order for cylinder seals. What is current part number/

    Great question! The part number is K662051 - thank you for reaching out!


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