Hydraulic Cylinders for Wind Towers: Installation & Maintenance

Wind-tower work can call for very different hydraulic setups depending on the space and the load. One job may need a low-height ram tucked into a tight area, while another needs a hollow cylinder around a rod or a pair of cylinders tied into the same hydraulic source.

Winshaw supplies these components for jobs such as foundation-bolt work, tower assembly, gearbox removal, bearing work, and other heavy pushing or lifting applications.

When two cylinders are used together, a manifold such as the HM2 two-port manifold can connect both rams to the same hydraulic source. The pressure applied to each cylinder can then be monitored from the system gauge. Cylinder force is determined using the cylinder’s published effective area and the applied hydraulic pressure.

How Hydraulic Cylinders Are Used During Installation

The setup depends heavily on the available space and the work being performed.

A strongback arrangement may use two smaller cylinders, such as a pair of HLS302 rams. On another job, a hollow cylinder such as the HHS603 may make more sense because a rod or fastener needs to pass through the center of the ram.

Where two compatible cylinders share a manifold, both receive pressure from the same hydraulic source. The cylinder specifications, mounting arrangement, and structure being loaded still need to be considered when determining how the load will be shared.

Key Applications

• Foundation-bolt tensioning at the tower base.
• Flange alignment when tower sections are being brought together.
• Gearbox removal and other heavy component work.
• Bearing installation or removal during service.
• Pushing, lifting, or separating heavy components during installation or repair work.

Selecting Rams, Manifolds, and Pumps

• Capacity: Start with the actual load the ram has to handle, then check that number against the cylinder’s published tonnage before choosing a model.
• Stroke: Measure the distance the ram has to travel and the space it has to do it. A cylinder can be strong enough for the load and still be wrong for the job if it bottoms out early or will not fit between the structure and the work point.
• Low-height applications: A pancake-style cylinder can be useful where there is very little room between the load and support surface.
• Hollow or solid design: A hollow ram allows a rod, bolt, or other hardware to pass through the center.
• Manifold and hose ratings: Every component in the hydraulic circuit needs to be rated for the pressure being used.
• Gauge calibration: Critical tensioning or load-control work should use pressure-measuring equipment with calibration appropriate to the job requirements.

For more on manifold selection, see Hydraulic Manifolds: How to choose a design and where to buy them.

Using Pressure and Effective Area to Determine Force

The basic relationship is:

Force = Pressure × Effective Area

The effective area comes from the cylinder manufacturer’s specifications. Pressure and area must be expressed in compatible units for the resulting force calculation to be correct.

For example, when working in U.S. customary units, pressure may be listed in PSI and effective area in square inches.

The calculation does not replace the cylinder’s published capacity. The cylinder, pump, manifold, hoses, fittings, and other components must all remain within their individual ratings.

A calibrated pressure gauge gives the crew a way to verify the hydraulic pressure being applied during the operation.

Working With Paired Cylinders

Using two cylinders on the same job takes more than connecting both hoses to a splitter.

Check that the cylinders are appropriate for the setup and pay attention to their stroke, effective area, mounting, and available travel. A shared manifold puts the cylinders on a common pressure source, but the physical setup still affects how the load reacts.

Keep both cylinders where their movement can be observed, and follow the equipment and job procedures for positioning, bleeding, loading, and pressure control.

Wind-Tower Maintenance After Installation

The same type of hydraulic equipment used during construction can return later for maintenance.

Gearbox work, bearing removal, pressing, separation, and structural adjustments may all require portable hydraulic force. A low-height HLS1002, for example, may suit a job with limited clearance, while a longer-stroke model such as the HSS308 may be useful when more travel is required.

The model choice comes back to the actual job: required force, available stroke, physical clearance, and how the cylinder can be safely positioned.

Field Maintenance Checklist

• Look over hoses for cuts, abrasion, bulges, or other damage before pressurizing the system.
• Check couplers, fittings, and seals for fresh oil or damaged components.
• Confirm that the pressure gauge meets the calibration requirements for the work being performed.
• Keep exposed cylinder rods clean and protected from damage.
• Check mounting and support points before putting a cylinder under load.
• Follow the manufacturer’s inspection, lubrication, storage, and service instructions for the specific equipment.

Safe Operation Notes

Hydraulic cylinders used for lifting, pressing, or tensioning can develop extremely high forces, so the entire setup needs to be treated as a loaded system.

Only trained personnel should assemble and operate the equipment.

Use suitable blocking, cribbing, or other mechanical support where the job requires it. A pressurized hydraulic cylinder should not be treated as permanent mechanical support for a suspended or elevated load.

Keep personnel away from the load path and from areas where a component could move if pressure is released or something shifts.

When paired cylinders are used, make sure the setup allows both rams to move as intended rather than allowing one cylinder to reach the end of its stroke or take load in an unintended way.

What Winshaw Looks at When Building a Setup

Cylinder capacity is only one part of the selection.

Winshaw also looks at the required stroke, available clearance, cylinder style, system pressure, hose arrangement, manifold configuration, and how pressure will be monitored.

For paired-cylinder work, Winshaw can supply compatible cylinders along with a manifold and the other hydraulic components needed for the application.

That gives the crew a system built around the actual job instead of trying to piece together components after arriving on site.

Photo credit: https://www.linkedin.com/company/jbs-energy-solutions/JBS Energy Solutions

Further Reading

• Hydraulic Manifolds: How to choose a design and where to buy them — manifold selection and configuration.
• How Does a Single Acting Hydraulic Cylinder Work? — technical basics for single-acting cylinders.
• How Does a Double Acting Hydraulic Cylinder Work? — overview of double-acting cylinders.
• Considerations When Using Hydraulic Bolt Tensioners — practical notes for tensioner use on bolted flange joints.

If your wind-tower project requires matched cylinders, manifolds, pumps, hoses, or calibrated gauges, contact Winshaw for help putting together a hydraulic setup that matches the load, available space, and work being performed.