3721260430 Loader Friction Plate for ZW370

The original friction plate (part number 3721260430) is a genuine transmission component of the Hitachi ZW370 series wheel loader, mainly used in the transmission wet clutch or brake assembly of this model. The ZW370 series includes 37 ton models such as ZW370-5A and ZW370-G, typically equipped with Cummins QSX15 engine (rated power 255kW) and hydraulic torque converter gearbox. The universal number 3721260430 of this friction plate is its unique identifier in Hitachi's original accessory system, ensuring that it matches the size and working conditions of the main clutch (or brake) steel plate, pressure plate, and hydraulic system perfectly. When placing an order, it is necessary to provide the complete model and serial number of the loader for verification to avoid mismatches.
 

This product belongs to the copper based wet powder metallurgy friction plate specialized for construction machinery, and follows the JB/T 10767-2022 "Technical Specification for Copper Based Wet Powder Metallurgy Friction Plates for Loader" standard. The substrate is made of copper based powder metallurgy material, which is formed by high-temperature sintering and has grooves or grid textures on the surface to enhance oil flow and heat dissipation performance. The main technical indicators include: friction coefficient 0.10-0.14 (wet type), density ≥ 6.2g/cm ³, hardness HB 60-90, and excellent high temperature resistance (≤ 300 ° C), pressure resistance (≥ 3MPa), and anti adhesive wear characteristics. The inner/outer diameter, thickness, and tooth profile parameters of the original friction plates have undergone strict matching tests to ensure stable friction performance and long service life even under high transmission loads, frequent gear shifts, and oil immersion environments.

It is recommended to check the friction plate every 1000-1500 hours of work or once a year for signs of erosion, peeling, cracking, abnormal wear, or excessive thickness (the wear limit is usually 70% of the original thickness). When replacing, thoroughly clean the clutch (or brake) assembly, remove old disc residue and oil stains, and use original 3721260430 pieces. During installation, it should be tightened evenly according to the order specified in the maintenance manual (usually alternating between steel plates and friction plates) and torque (usually 40-60N · m), and ensure that the cleanliness of the hydraulic oil (NAS level 8 or below) and the oil temperature (≤ 95 ° C) are normal. Long term semi clutch operation and sudden acceleration/braking should be avoided in daily life. The transmission oil and filter element should be replaced regularly to extend the service life of the friction plate.