Loader Hydraulic Cylinders

Premium Aftermarket Wheel Loader Hydraulic Cylinders for Mining & Construction

SEIGO Machinery manufactures direct-replacement loader hydraulic cylinders that meet or exceed OEM specifications for large wheel loaders and underground mining loaders. From Caterpillar 988, 992 and the R1700 underground LHD to Komatsu’s WA-series giants, we supply lift, tilt and steering cylinders engineered to move full buckets, shift after shift, in the world’s toughest mining and quarry operations.

Our Product Range

A complete range of cylinders covering every function of your loader’s work cycle:

Lift (Hoist) Cylinders — raise and lower the loader linkage under full bucket load.
Bucket / Tilt Cylinders — crowd, curl and dump the bucket with high breakout force.
Steering Cylinders — articulated-frame steering for heavy and ultra-class wheel loaders.
Underground LHD & Arctic-Spec Cylinders — hoist and tilt cylinders for underground mining loaders, plus cold-climate packages for extreme sub-zero sites.

Compatible Brands & Series

We stock and custom-manufacture replacement cylinders for the world’s leading mining and construction loaders:

Brand	Series / Models Covered	Cylinders Supplied
Caterpillar (CAT)	966, 988G / 988H, 992K, R1700 (underground LHD) & other large loaders	Lift, Bucket/Tilt, Steering
Komatsu	WA380-3, WA470-3, WA500-3 / -6 / -8, WA600-3, WD600-3, WA900-3	Lift, Bucket/Tilt, Steering

Don’t see your machine? The models above are only a snapshot. As a full hydraulic cylinder solutions provider, SEIGO supplies and custom-manufactures replacement cylinders for a far wider range of mining and construction equipment — 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”:

Material excellence — 42CrMo4 induction-hardened piston rods resist rock impact and scoring.
Superior sealing — NOK or Parker seal kits (Japan / USA origin) for zero leakage from −40 °C to +100 °C, with arctic-spec options for extreme cold.
Rigorous testing — 100% pressure-tested at 1.5× operating pressure before shipment.
Warranty — backed by a 12-month / 2,000-hour warranty.

Whether you need a single cylinder for a repair job or a bulk order for fleet maintenance, SEIGO keeps your machines working and your downtime low.

Showing all 8 results