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2.25" Cylinder Seal Kit (1.25" Shaft)

  • $17.31
  • or

Koyker OEM Cylinder Part 672933

Due to high demand, this product will take approximately 2-4 weeks to ship. We apologize for the delay.

2 1/4" Cylinder Packing Seal Kit works with certain Koyker front-end loaders. Complete kit with all seals needed to service (1) 2 1/4” 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: K672933

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

Related Products:

K672934: 2 1/4” Cylinder Gland Kit
K672935: 2 1/4” Cylinder Piston Kit

Loader Models:

Koyker Loader 180
Koyker Loader 185
Koyker Loader 190
Koyker Loader 195
(Loader may also utilize 2" Cylinder Seal Kit)
Koyker Loader 220 (Loader may also utilize 2.5" 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 2 reviews
James Wilson

KOYKER OEM CYLINDER PART 672933 complete rebuild kit. great quality, Bushings were really tight. took several times of heating in warrm water to get them on. Parts were shipped and received in a timely manner.

regain w.
terrible customer service

I would not recommend this company to anyone. The customer help service is the worst. One Rep said we could return unopened seals for the correct seals, Another said no returns allowed of any sort. Do not use this company for any part.

I'm sorry to hear you had such a frustrating time with our customer service team. I've forwarded your message to our Customer Service Manager so that they can look into this issue and come up with a better way to handle situations like this in the future.

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Ask a Question
  • the outside diameter of my cylinders is 2 3/8 and shaft size is 1 1/4. is the 2 1/4 still the correct size to order? this is for a 110 loader I think about 15 years old.

    Thank you for your question!
    The 110 loader is a discontinued model and originally was manufactured with a 1 3/4" cylinder. (110 Loader Manual) It sounds like the cylinders may have been changed throughout the years. We would be happy to assist further by looking at a picture of the current cylinder to see if it is a Koyker manufactured item. Please email us at at your earliest convenience.


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