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2.5" Cylinder Seal Kit (1.5" Shaft)

  • $19.78
  • or

Koyker OEM Cylinder Part 662048

Part Details

2 1/2 Cylinder Packing Seal Kit works with certain Koyker front-end loaders. Complete kit with all seals needed to service (1) 2 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: K662048

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

Related Products:

K663317: 2 1/2” Cylinder Gland Kit
K663318: 2 1/2” Cylinder Piston Kit

Loader Models:

Koyker Loader 220 (Loader may also utilize 2.25" Cylinder Seal Kit)
Koyker Loader 235
Koyker Loader 245
Koyker Loader 310
Koyker Loader 315
Koyker Loader 345
Koyker Loader 385
Legend Loader 542

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 37 reviews
Howard Smith
OEM seals

These worked great. A perfect fit to stop my hydraulic cylinder from leaking. My Koyker 210 bucket.

McCoy, Len
Great part work like aglove

Great product

James Cauthen
Hydraulic cylinder rebuild kit.

The best parts! The best price! The best shipping! I love this company!!!

Bobby Barger
2.5 inch cylinder rebuild kit

Price didn't rip my wallet and the kit installed without issue. Tractor like new again. Thanks AGPARTS!

Jon O.
2.5 seal kit

They worked out great. fit just like they were supposed to.

Thanks for the feedback!

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Ask a Question
  • will this cylinder kit work on the 210 cylinders? this measures 1.5 shaft and best I can tell it will be a 2.5 cylinder.

    Thank you for reaching out! Yes, a (K662048) seal kit will work on a 210 cylinder that is 2.5” with a 1.5” rod.

  • Does this fit the buckey cylinders on a Koyker Super K front end loader.

    Thank you for reaching out! The Super K had both a 2.5” and a 3” bucket cylinder. (Please measure your current parts to be sure) The 2.5” will fit providing the style features flat pieces on the gland to take it off and not the spanner type. If you have a spanner type, you will probably need a gland and piston kit. Or if it is held in place by a snap ring, you will need a new cylinder. If you have any further questions, please connect with our Koyker customer service team at 1-800-456-1107.

  • Will this 2.5 kit 662048 fit my k5 koyker? Thanks Ed.

    Yes if it is a 2.5” cylinder with a 1.5” rod, and it is the current style gland and piston. Most are but some of the old ones were different. If different, you would need to replace the gland with seals (part# 663317) and piston with seals (part# 663318). Please reach out to our Koyker customer service team to discuss further if needed. 1-800-456-1107. Thank you!


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