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Mining Equipment Hydraulics

Excavators loading haul trucks on the benches of an open-pit mine

Mining

Mining Equipment Hydraulics

Hydraulic Supply Company stocks the hoses, fittings, cylinders, and filters that keep haul trucks, loaders, drills, shovels, and dozers running in open-pit and underground mines.

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Mining hydraulic systems run long shifts under heavy load, with constant exposure to dust, slurry, and abrasive rock. Hydraulic Supply Company supplies the mining hydraulic supplies these systems depend on: high-pressure spiral hose, fittings and adapters in every major standard, replacement cylinders, and filtration for contamination control. We also stock hydraulic components for mining from Eaton and other leading manufacturers.

Every HSC branch is a certified Danfoss Aeroquip Hose Center. When a hose fails on a haul truck or drill rig, we fabricate a replacement assembly the same day with no minimum order, so hydraulic mining equipment gets back to work without waiting on freight.

Shop 70,000+ products online with same-day shipping on orders placed before 2 PM EST, or visit any branch for counter service. For site-wide contamination problems, our engineering team can help specify filtration and component upgrades for mining hydraulic systems.

Certified Danfoss Aeroquip Hose Center

Same-day custom hose assembly

High-pressure spiral hose

No minimum order

Hydraulic Hoses for Mining Equipment

Hydraulic Hoses for Haul Trucks, Loaders, and Drills

Mining equipment runs high-pressure, high-impulse circuits for long shifts, with hose routed past abrasive rock, heat, and slurry. SAE 100R12, 100R13, and 100R15 spiral hose is the standard for high-cycle circuits on shovels, loaders, and haul trucks. SAE 100R2 wire braid covers lower-pressure accessory circuits. HSC stocks spiral hydraulic hose in bulk and as finished assemblies.

For suction and return lines, and for fluid transfer and dewatering at the mine site, HSC also carries dedicated mining hose. Hose protection sleeves and guards extend assembly life where hose contacts rock or frame edges.

Common Applications

Haul truck hoist and steering circuits

Wheel loader lift arm and bucket circuits

Hydraulic shovel and excavator boom, stick, and bucket circuits

Drill rig feed, rotation, and mast circuits

Suction and return lines on hydraulic reservoirs

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Hydraulic hose assemblies with crimped steel fittings and spiral wrap routed along a yellow hydraulic cylinder on heavy equipment

Steel hydraulic fittings and quick couplers with color-coded dust caps on industrial equipment

Hydraulic Fittings and Adapters

Mining Hydraulic Fittings and Adapters

Mining fleets mix equipment from several manufacturers, so one site can need ORFS, JIC, SAE flange, and metric fittings on the same shift. HSC carries all standard hydraulic hose fittings in steel and stainless steel, plus the hydraulic adapters needed to join mixed-standard systems.

SAE flange connections in Code 61 (3,000 PSI series) and Code 62 (6,000 PSI series) are common on high-pressure pump and manifold ports. Split flange kits and O-rings are stocked for those connections. For Komatsu equipment, HSC also carries Komatsu and Kobelco adapters.

Common Applications

ORFS fittings for Caterpillar and Komatsu mining equipment

SAE Code 61 and Code 62 flange fittings for pump and manifold ports

JIC fittings for older North American equipment

Metric and BSP fittings for European-origin drills and loaders

Cross-standard adapters for mixed-fleet maintenance shops

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Hydraulic Cylinders for Mining Machinery

Hydraulic Cylinders for Mining Equipment

Mining cylinders carry heavy loads through long duty cycles, and dust and slurry attack rod seals first. HSC stocks welded and tie-rod hydraulic cylinders for replacement on support equipment.

Cylinder seal kits and wiper rings are stocked for in-shop rebuilds, and HSC's hydraulic repair and service team rebuilds cylinders that are too large to replace from stock.

Common Applications

Loader lift and tilt cylinders

Dozer blade lift and ripper cylinders

Haul truck steering cylinders

Drill rig mast and feed cylinders

Rod seal and wiper replacement on dust-exposed cylinders

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Hydraulic cylinder with a chrome rod on the boom of a yellow excavator

Filter housings with clear bowls and a pressure gauge on an industrial fluid system

Hydraulic Filtration and Contamination Control

Hydraulic Filtration for Mining Hydraulic Systems

Contamination is a leading cause of hydraulic component wear in mining, where dust enters through breathers, cylinder rods, and fluid top-ups. HSC stocks return, pressure, and suction hydraulic filters, plus breathers and filler-breathers that keep airborne dust out of reservoirs.

Filter carts clean new fluid before it enters a machine and polish fluid already in service. A fluid sampling and analysis kit tracks fluid cleanliness against a target ISO 4406 code, so filters are changed on condition instead of on guesswork.

Common Applications

Return and pressure filter replacement on loaders and haul trucks

Reservoir breather upgrades for dusty sites

Pre-filtering new hydraulic fluid with a filter cart

Fluid sampling to track ISO 4406 cleanliness codes

Suction strainer service on pump inlets

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Frequently Asked Questions: Mining Equipment Hydraulics

What hydraulic hose is used on mining equipment?

High-pressure, high-cycle circuits on shovels, loaders, and haul trucks use SAE 100R12, 100R13, or 100R15 spiral hose. Lower-pressure accessory and pilot circuits typically use SAE 100R2 wire braid. To match a replacement, you need the hose inside diameter, the circuit's working pressure, and the fitting type on each end. Bring the old assembly to any HSC branch and we can fabricate a replacement the same day.

What hydraulic fittings do mining machines use?

Most current Caterpillar and Komatsu equipment uses ORFS (O-ring face seal) fittings, with SAE Code 61 and Code 62 flanges on high-pressure pump and manifold ports. Older North American equipment often uses JIC 37-degree flare fittings, and European-origin drills and loaders may use metric or BSP fittings. HSC stocks all of these standards and the adapters needed to connect them.

How do you keep dust out of a mining hydraulic system?

Most contamination enters through reservoir breathers, worn rod wipers, and new fluid added during top-ups. Upgrade breathers on dusty sites, replace rod seals and wipers at the first sign of scoring, and pre-filter new fluid with a filter cart. Regular fluid sampling against an ISO 4406 cleanliness target shows whether these measures are working.

What causes hydraulic hose failure on mining equipment?

The most common causes are abrasion against rock and frame edges, pressure spikes that fatigue the wire reinforcement, heat from routing near engines and exhaust, and bends tighter than the hose's minimum bend radius. Regular inspection for cover wear, leaks at fittings, and soft spots, plus protective sleeving in contact zones, prevents most failures.

Can I get a hydraulic hose assembly made the same day?

Yes. Every HSC branch is a certified Danfoss Aeroquip Hose Center with on-site crimping equipment. Bring your old hose assembly or provide the inside diameter, overall length, fitting type on each end, and working pressure. Most replacement assemblies are fabricated while you wait, with no minimum order.