4248320 4310241 4236054 4340511 For Hitachi EX400 EX400-3 EX400-5 Excavator Hydraulic Boom Cylinder 

Prouduct Description

Tube: Made from high-strength 25Mn steel, identical to OEM standards. Sandblasted and coated with a dual-layer baked paint finish for durability.

Rod: Fully heat-treated piston rod with high-frequency hardening (HRC 55) and industrial-grade chrome plating for extended wear resistance.

Seal: Equipped with premium NOK (Japan) and SKF (USA) seals, ensuring an ultra-low oil leakage rate below 1%.

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Company Information

GuangZhou GuoLi Engineering Machinery Co., Ltd. over 16 years of experience in the field of excavator hydraulic cylinders, establishing itself as a reliable worldwide provider and producer. Our company is engaged in the supply of spare parts for such equipment manufacturers as: JCB, CASE, VOLVO, DOOSAN, HYUNDAI, HITACHI, KOMATSU, CATERPILLAR, SHANTUI,SUMITOMO,KUTO,KUBOTA

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