Koyker OEM Cylinder Part 663336

3 1/2" Piston Kit works with certain Koyker front-end loaders. Completely assembled 3 1/2” Cylinder Piston with all seals.

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

NOTE: This product does not qualify for returns. Confirm correct piston and packing kit by comparing pictures, checking owner's manual AND by measuring the inside diameter of the current piston.

This kit includes the following pieces:

Part Number: K663336 (Assembled)

• (1) 3 1/2" Aluminum Piston
• (2) 3 1/2" U-Cup Seals
• (1) 1" Rod “O” Ring
• (1) 1" Lock Nut

Related Products:

K663334: 3 1/2" Cylinder Seal Kit
K663335: 3 1/2" Cylinder Gland Kit

Loader Models:

Koyker Loader 645 (Loader may also utilize 3" Piston Kit)

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.

HYDRAULIC CYLINDERS
INSPECTION AND MAINTENANCE:
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.

IMPORTANT:
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.

NOTE:
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 info@siouxsteel.com to discuss.

International Orders

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

ALL PURCHASES ARE FINAL.

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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