Arm Cylinder Seal Kit for R360-7 Excavator Hydraulic Repair

This 31Y1-18480 arm cylinder seal kit is used for Hyundai R360-7 excavator arm cylinder repair. It is designed to help restore hydraulic sealing performance when the arm cylinder has oil leakage, weak digging force, slow movement, pressure loss, or unstable holding power.

The arm cylinder is one of the main working cylinders on an excavator. It operates frequently during digging, pulling, lifting, trenching, loading, and heavy-duty earthmoving work. Once the seals inside the cylinder become worn, hardened, cracked, or damaged, hydraulic oil may leak and the machine may lose working efficiency. Replacing the old seals with the correct arm cylinder repair kit is a cost-effective way to rebuild the cylinder instead of replacing the complete cylinder assembly.

Product Parameters

Main Selling Points

Accurate Fit for R360-7 Arm Cylinder
This seal kit is matched with part number 31Y1-18480 and suitable for the R360-7 arm cylinder. Buyers can confirm the product by part number, machine model, and cylinder position.

Helps Reduce Hydraulic Oil Leakage
A worn arm cylinder seal may cause visible oil leakage around the rod, poor pressure holding, weak arm movement, and reduced digging performance. This hydraulic cylinder seal kit helps rebuild the sealing system and improve the excavator’s working condition after repair.

Practical Cylinder Rebuild Solution
Using a proper excavator cylinder repair kit can reduce repair cost, shorten downtime, and extend the service life of the hydraulic cylinder. It is suitable for repair shops, fleet maintenance teams, parts resellers, and excavator owners.

Convenient for Stock and Mixed Orders
The product is supplied as one complete set, easy to store, identify, and ship. It can be ordered together with other excavator seal kits, hydraulic repair parts, engine parts, couplings, sensors, hoses, and rubber parts.

Application

This arm cylinder seal kit 31Y1-18480 is suitable for Hyundai R360-7 excavator arm cylinder maintenance. It is commonly used when the machine shows hydraulic oil leakage, weak arm pulling force, slow arm action, unstable cylinder holding, or reduced working efficiency.

We can also help customers match other related parts, including boom cylinder seal kits, bucket cylinder seal kits, main pump seal kits, control valve seals, rod seals, piston seals, dust seals, wear rings, and O-ring kits.

Buyer Reminder

Please confirm the part number 31Y1-18480, machine model R360-7, and cylinder position before ordering. If you are not sure whether this seal kit fits your excavator, send us the machine model, part number, cylinder photos, or old seal kit sample details. We can help check the correct item before shipment.

Original equipment names and part numbers are used for reference and identification only.