Komatsu HM400-3 Rear Suspension Cylinder Dump Truck Hydraulic Cylinder
Komatsu HM400-3 Rear Suspension Cylinder Dump Truck Hydraulic Cylinder
Restore the ride quality and stability of your fleet with Seigo’s premium rear suspension cylinder for Komatsu HM400-3. Engineered to OEM specifications for exact fitment on Articulated Dump Trucks. Features upgraded nitrogen sealing technology to prevent leaks and absorb heavy shock loads.
High-Durability Rear Suspension Cylinder for HM400-3 ADT
Operating on rough haul roads takes a toll on your Articulated Dump Truck (ADT) suspension. When your original cylinders start leaking oil or losing nitrogen pressure, Seigo Machinery offers a reliable, high-performance replacement rear suspension cylinder for Komatsu HM400-3.
Designed to absorb the punishing impact of fully loaded 40-ton payloads, our cylinders ensure operator comfort and protect the truck frame from structural fatigue.
Why Choose Seigo Suspension Cylinders?
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Superior Nitrogen Retention: Our hydro-pneumatic design utilizes premium floating piston seals (Hallite/Parker) to separate gas and oil effectively, preventing pressure loss and “sagging” suspension.
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Impact Resistance: The piston rod is induction hardened and polished to a mirror finish, ensuring smooth operation even in gritty, muddy mining environments.
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Direct Fit Replacement: CNC-machined mounting points ensure this cylinder bolts directly onto your Komatsu HM400-3 without any modification.
Technical Specifications
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Application: Rear Axle Suspension
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Machine Model: Komatsu HM400-3 Articulated Dump Truck
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Part Type: Aftermarket Replacement
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Finish: Anti-corrosion yellow/black paint match.
Looking for Komatsu suspension repair parts? We also supply seal kits, rod bushings, and sensors for the complete HM400 series (HM300, HM400-2, HM400-3).
Keep Your Fleet Moving
Don’t let a collapsed suspension slow down your cycle times. Contact us today for a quote on HM400-3 suspension cylinders.




