Dump Truck Hydraulic Cylinders

Premium Aftermarket Dump Truck Hydraulic Cylinders for Mining & Construction

Downtime on a mining haul truck costs thousands of dollars an hour. SEIGO Machinery manufactures drop-in replacement dump truck hydraulic cylinders — hoist, steering and suspension — for both rigid-frame and articulated haulers, engineered to survive the harshest mine and quarry environments as a cost-effective, high-durability alternative to OEM parts.

Our Product Range

A complete range of cylinders covering every hydraulic function of your haul truck:

Hoist (Body Lift) Cylinders — single-acting, multi-stage telescopic cylinders that raise and lower the dump body smoothly under full payload.
Steering Cylinders — heavy-duty cylinders for precise control of loaded rigid and articulated haulers.
Suspension / Strut Cylinders — nitrogen-charged front and rear suspension cylinders for ride damping on off-highway trucks.

Compatible Brands & Series

We manufacture and supply replacement cylinders for the world’s leading rigid and articulated haul trucks:

Brand	Series / Models Covered	Cylinders Supplied
Caterpillar (CAT)	773D / 773E / 775E, 777C / 777D / 777F Coming soon 785, 793	Hoist, Steering, Suspension
Komatsu	HD465-7, HD785-7, HM400-3 (articulated) Coming soon HD605, HD1500 & more	Hoist, Steering, Suspension
Terex	TR50	Hoist, Suspension

Don’t see your truck? The models above are only a snapshot, and our range is expanding fast. As a full hydraulic cylinder solutions provider, SEIGO supplies and custom-manufactures hoist, steering and suspension cylinders for a far wider range of mining and construction haulers — including many models and brands not listed here. Talk to an expert →

Why Choose SEIGO Cylinders?

Unlike generic replacements, every SEIGO cylinder is built “Mining-Ready”:

Built for maximum payload — hoist cylinders precision-machined for smooth extension and retraction under full load.
Anti-corrosion plating — hard chrome and nickel-chrome overlay options resist grit, dust and moisture in mining pits.
Premium sealing — NOK, Parker or Hallite seals prevent oil bypass and internal leakage, extending service intervals.
Rigorous testing — 100% pressure-tested at 1.5× operating pressure before shipment.
Warranty — backed by a 12-month / 2,000-hour warranty.

From iron ore, copper and coal haulage to quarrying and heavy earthmoving, SEIGO delivers ISO-grade cylinders with global shipping to keep your fleet moving and your downtime low.

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