Skip to product information
SKU:
ZZ3F03694
Same day shipping if ordered by 4PM CST.
Hydraulic Seal Kit Fit Koyker Front-End Loaders 1-3/4" Cyl Replaces K663304
$50.59
In Stock
$50.59
Sale price
$50.59
Regular price
Cylinder Bore
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
Hydraulic Seal Kit for Koyker Front-End Loaders
This hydraulic seal kit is a replacement for Koyker front-end loaders with a 1-3/4" cylinder and replaces OEM number K663304. It rebuilds the loader's lift cylinders to stop leaks and maintain lifting power.
Overview
This hydraulic seal kit for Koyker front-end loaders is designed to fit cylinders with a 1-3/4" bore. It replaces K663304 and provides everything needed to reseal a hydraulic cylinder. This kit is for maintaining loader performance and preventing oil leaks.
Built For Performance
- Contains rod seals, piston seals, and wipers for a complete rebuild.
- Built to handle high hydraulic pressure in loader applications.
- Directly replaces the K663304 OEM seal kit.
- Packaged as a full seal set to minimize downtime.
- Resistant to oil, weather, and wear.
Fits These Machines
- for Koyker front-end loaders
- for Koyker cylinders with 1-3/4" bore
On-The-Job Use
- Used when loader lift cylinders show oil buildup or drips.
- Repairs loader arms that sag or drift under load.
- Applied during hydraulic system overhauls on agricultural tractors.
- Keeps loader lift and dump functions responsive.
Specs At A Glance
| Cylinder Bore | 1-3/4" |
| Part Number(s) | K663304 |
Good To Know
Q: Will this seal kit fit any brand of loader? A: This is specifically designed for Koyker front-end loaders. The dimensions and seal profile match the 1-3/4" cylinder used in these models, but always verify your cylinder's measurements.
Q: What's included in the kit? A: The kit includes all seals needed to rebuild a single cylinder, such as rod wipers, rod seals, and piston seals. It does not include cylinder barrels or rods.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.