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Equipment technician in dark workwear servicing the hydraulic hoses and cylinder on the boom of a gray excavator at a construction site
Construction

Construction Equipment Hydraulics

Hydraulic Supply Company stocks the hoses, cylinders, valves, and fittings that keep excavators, skid steers, backhoes, cranes, and boom lifts working on the jobsite.

Call (800) 507-9651 Contact us
Construction Equipment Hydraulics

Hydraulic Supply Company supplies hoses, cylinders, fittings, pumps, and valves for excavators, skid steer loaders, cranes, boom lifts, backhoes, and other construction equipment. Our inventory is built around the high-pressure, high-cycle demands of construction hydraulics, with hose rated to SAE 100R2, 100R12, and 100R15 spiral standards and cylinders engineered for heavy-duty duty cycles. We also stock hydraulic components for construction from Eaton and other leading manufacturers.

When a hose blows on a jobsite, downtime is measured in crew hours and contract penalties. Every HSC branch stocks high-pressure hydraulic hoses for construction equipment in common sizes and carries on-site crimping equipment to build custom assemblies the same day. No minimum order. No waiting for freight.

We also carry replacement hydraulic cylinders for excavators and heavy equipment, directional control valves for construction equipment, gear pumps, and hydraulic fluid to support full-system repairs at the branch or on-site.

Certified Danfoss Aeroquip Hose Center
Same-day custom hose assembly
On-site crimping equipment
No minimum order
Hydraulic Hoses for Construction Equipment

Hydraulic Hoses for Excavators and Heavy Equipment

Construction equipment hydraulic systems typically operate at 3,000 to 5,000 PSI with significant pressure spikes during digging, lifting, and rotating cycles. HSC stocks SAE 100R2, 100R12 (4-spiral), and 100R15 (6-spiral) hoses in bulk and as finished assemblies.

Wire braid hoses cover standard boom and arm circuits. Spiral hoses cover high-cycle applications such as bucket and attachment cylinders. All hose is compatible with standard petroleum and biodegradable hydraulic fluids.

Common Applications

Excavator boom, arm, and bucket cylinder hose circuits
Skid steer loader lift arm and attachment circuits
Boom lift and aerial work platform hydraulic circuits
Crane swing, boom, and winch hydraulic circuits
Backhoe dipper and bucket cylinder replacements
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High-pressure spiral hydraulic hose assemblies with crimped steel fittings routed along the boom and arm of a gray excavator on a construction site
Heavy-duty welded hydraulic cylinder with a polished chrome rod mounted on the arm of a gray excavator
Hydraulic Cylinders for Construction Machinery

Hydraulic Cylinders for Construction Machinery

Excavator arm, boom, and bucket cylinders operate under continuous heavy load and high cycle counts. HSC stocks welded and tie-rod hydraulic cylinders for replacement and rebuild applications, with bore sizes from 2 inches to 8 inches.

Mounting styles include clevis, cross tube, and flange. Cylinder seals and rebuild kits are available for in-shop repair.

Common Applications

Excavator boom, arm, and bucket cylinders
Skid steer loader lift and tilt cylinders
Backhoe stabilizer and dipper cylinders
Crane outrigger and boom extension cylinders
Telehandler boom and carriage cylinders
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Hydraulic Valves for Construction Equipment

Hydraulic System Repair for Construction Equipment

Directional control valves, counterbalance valves, and relief valves are common failure points in construction equipment hydraulic circuits. HSC stocks manually operated and solenoid-operated directional control valves, including monoblock and sectional styles.

Counterbalance valves are stocked for excavator and crane applications where load-holding is required to prevent uncontrolled descent.

Common Applications

Directional control valve replacement on skid steers and backhoes
Counterbalance valve service on excavator and crane boom circuits
Relief valve replacement on power units and hydraulic hammers
Proportional valve service on grading and fine-control applications
Solenoid valve replacement on electronically controlled circuits
Shop Hydraulic Valves
Steel hydraulic directional control valve manifold with control spools mounted on the chassis of gray construction equipment
Assortment of steel ORFS and JIC hydraulic fittings and adapters sharp in the foreground with a gray excavator blurred behind on a construction site
Hydraulic Fittings and Repair Parts

Hydraulic Fittings and Adapters for Heavy Equipment

Construction equipment manufacturers use ORFS, JIC, SAE flange (3,000 and 6,000 PSI series), and metric fittings depending on equipment origin and application. HSC carries all standard fitting types in carbon steel and stainless steel, plus adapters for mixed-specification systems.

Hydraulic filters, breathers, and fluid are also stocked for complete system service.

Common Applications

ORFS fittings for Caterpillar, Komatsu, and Volvo equipment
JIC fittings for older North American construction equipment
SAE flange fittings for high-pressure manifold connections
Metric fittings for European-origin equipment (Liebherr, Manitowoc)
Hydraulic filters and breathers for power unit maintenance
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Frequently Asked Questions: Construction Equipment Hydraulics

What type of hydraulic hose is used on excavators?

Excavators use SAE 100R2 wire braid hose on standard boom and arm circuits, and SAE 100R12 (4-wire spiral) or 100R15 (6-wire spiral) on high-pressure and high-cycle circuits such as bucket cylinders and swing motors. Working pressures typically range from 3,000 to 5,000 PSI. HSC fabricates replacement assemblies the same day at any branch.

How do I replace a hydraulic cylinder on a skid steer?

Depressurize the hydraulic system and lower all implements to the ground. Disconnect the hydraulic lines from the cylinder ports and cap them to prevent contamination. Remove the mounting pins or hardware at both ends. Bring the old cylinder to an HSC branch for measurement: bore size, rod diameter, stroke length, and mounting style. We can match or fabricate a replacement from stock.

What causes hydraulic hose failure on construction equipment?

The most common causes are abrasion from contact with metal surfaces or debris, pressure spikes from improper relief valve settings, heat degradation from routing near exhaust components, and hose bends below the minimum bend radius. Regular inspection for wear, soft spots, and fitting leakage is the most effective prevention.

How do I know if a hydraulic pump is failing on my excavator?

Common signs include slow or weak cylinder movement, unusual noise from the pump, high hydraulic fluid temperature, visible contamination in the fluid, and elevated case drain flow. A failing pump typically shows reduced case drain pressure and increased internal leakage. HSC stocks gear pumps and piston pumps for most common excavator applications.

Can I get hydraulic hose made at an HSC branch 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 the working pressure. Most replacement assemblies are fabricated while you wait, with no minimum order.

Machine down on the jobsite?

Call your nearest branch or stop by the counter for same-day custom hose assembly.

Call (800) 507-9651 Contact us