4441963 Excavator Rubber Hose for EX1200-5

Part number 4441963 is a genuine rubber hose from Hitachi Japan, specifically designed for the Hitachi EX1200-5 ultra large mining hydraulic excavator. Based on the same hydraulic platform, it is also suitable for the same series of ultra large mining excavators such as EX1200-6 and EX1200-5A. From the large diameter of 1-1/2 "(38mm) on the label, it can be seen that this is a high-pressure delivery pipe used for the main hydraulic circuit (such as the main pump to the main control valve, or the main oil cylinder pipeline).

This product is a large-diameter (1-1/2 inches), four layer steel wire wrapped ultra-high pressure rubber hose, with an inner rubber layer made of oil resistant synthetic rubber to ensure compatibility with hydraulic oil; The reinforcement layer is made of multiple layers of high-strength steel wire weaving, providing extremely high pressure resistance (usually working pressure exceeding 35MPa) and resistance to pulse fatigue; The outer rubber layer is made of black wear-resistant and weather resistant synthetic rubber, with a smooth surface that can resist oil stains, ozone, ultraviolet rays, and physical scratches in harsh mining environments. The two ends of the hose are crimped with high-strength steel flanges or threaded joints.

Inspection cycle: Before starting work every day and every 8-10 working hours, the entire length of the hose must be visually inspected for bulges, cracks in the outer rubber layer, wear, and leakage at the joints. Install protective covers on areas prone to friction. Replacement timing: If the hose shows any form of bulging, cracking of the outer rubber layer exposing the steel wire, leakage at the joint buckle, or reaches the preventive replacement cycle (usually 2 years or 4000-5000 working hours, whichever comes first), it must be replaced immediately.