8T4772 3195647 1137478-G Arm Boom Bucket Hydraulic Cylinder Excavator Seal Kit

8T4772 3195647 1137478-G Arm Boom Bucket Hydraulic Cylinder Excavator Seal Kit

A complete hydraulic seal kit for an excavator should include 8T4772 for the arm cylinder, 3195647 for the bucket circuit, and 1137478-G for the boom’s gland. The combination of 8T4772, 3195647, and 1137478-G offers cross-compatibility with several loader models. Technicians note that 8T4772 reduces friction on the cylinder rod, while 3195647 provides high-temperature resistance. Meanwhile, 1137478-G excels in maintaining seal preload after thousands of cycles.

For loader hydraulic systems, failing to replace 3195647 promptly can lead to contamination of the entire circuit. The 8T4772 kit includes backup rings and O-rings that match the groove dimensions of standard excavator cylinders. Similarly, 1137478-G is often stocked by fleet managers because it fits both boom and bucket cylinders in compact loaders. When ordering, always verify that 8T4772, 3195647, and 1137478-G are genuine hydraulic-grade seals.

In summary, the seal kit referencing 8T4772 addresses cylinder leakage in the arm and bucket. The auxiliary number 3195647 guarantees compatibility with loader tilt cylinders. Finally, 1137478-G completes the assembly by protecting the rod surface from external debris. Using 8T4772, 3195647, and 1137478-G together ensures a 360-degree seal solution for excavator and loader hydraulic systems.