Product Description
| Model Num | Application | Cylinder | Serial Num | Bore | Rod | Code |
| 721D | LOADER BUCKET (Z-BAR) | 8605291 | 01/03- | 5.75 | 3 | P-UB-10 |
Frequently Asked Questions
Q: What are the bore and rod dimensions of the JIC-8605263 seal kit?
A: The JIC-8605263 is a P-UB-10 seal kit with a bore of 5.75 inches and rod diameter of 3 inches. It is designed specifically for loader bucket cylinders on the 721D model with Z-BAR configuration using cylinder 8605291. Verify these dimensions and cylinder number match your equipment before ordering.
Q: Which loader models does the JIC-8605263 fit?
A: This seal kit is designed for the 721D loader bucket (Z-BAR) cylinder 8605291 with serial number range 01/03 and later. It is not compatible with other loader models or bucket cylinder types. Confirm your loader model is 721D, bucket application, and cylinder is 8605291 before purchase.
Q: How often do bucket cylinder seals require replacement?
A: Bucket cylinders experience frequent cycle loading during dig and material handling operations. Seal lifespan typically ranges from 1500 to 3000 operating hours depending on duty intensity, material type being handled, and maintenance practices. High-wear applications may require replacement more frequently.
Q: What indicates that the JIC-8605263 seal kit is needed?
A: Bucket cylinder seal failure shows as external oil leakage at the rod end, sluggish bucket response, inability to hold load position, or visible contamination around the cylinder. These symptoms warrant immediate seal replacement to prevent hydraulic fluid loss and restore bucket control.
Q: Is the JIC-8605263 suitable as a replacement for other bucket cylinder seals?
A: The JIC-8605263 is engineered specifically for the 5.75-inch bore and 3-inch rod on 721D Z-BAR bucket cylinders. Do not cross-reference this kit to other cylinder sizes or bucket models. Using the wrong seal kit can result in leakage or seal extrusion under bucket load pressure.