31Y1-18210 Bucket Cylinder Seal Kit — Product Overview

The 31Y1-18210 Bucket Cylinder Seal Kit is a precision aftermarket replacement for Hyundai R140LC-7, R140LC-7A, R140W-7, and R140W-7A excavators. Designed for the bucket cylinder with 70mm rod diameter, this kit is manufactured to Hyundai OEM dimensional specifications using premium sealing materials etc.

The bucket cylinder on the 14-ton R140 platform handles the excavator’s highest structural loads — from bucket breakout forces during digging to shock loads when encountering rock or hardpan. Seal failure results in bucket drift (the bucket angle slowly changes under load), lost digging precision, and hydraulic oil contamination. The 31Y1-18210 kit uses polyurethane rod seals for maximum abrasion resistance in the bucket’s harsh operating environment, with PTFE backup rings for extrusion protection during peak breakout pressure.

DJF Seals supplies this kit at factory-direct wholesale pricing. Each kit undergoes dimensional inspection before shipment, ensuring consistent quality for Hyundai equipment dealers and independent excavator repair centers.

Technical Specifications

Compatible Models

• Hyundai R140LC-7 — Bucket Cylinder
• Hyundai R140LC-7A — Bucket Cylinder
• Hyundai R140W-7 — Bucket Cylinder (Wheeled)
• Hyundai R140W-7A — Bucket Cylinder (Wheeled)

Key Features & Benefits

• Bucket-Duty Tough — 70mm rod seal engineered for the high breakout forces and abrasive conditions of excavator bucket operation on the 14-ton platform.
• 4-Model Coverage — One kit fits both crawler (R140LC-7/7A) and wheeled (R140W-7/7A) Hyundai excavator variants.
• Abrasion-Resistant — Polyurethane rod seal withstands the dirt, rock dust, and moisture common in bucket cylinder environments.
• Complete Reseal Kit — Rod seal, piston seal, wiper, O-rings, and backup rings included for a full bucket cylinder rebuild.
• Factory-Direct Wholesale — Competitive pricing with flexible MOQ. Sample orders accepted for quality verification.