D128454 Power Steering Cylinder Review: Replaces Part Numbers 234447A1 and A137503

D128454 Power Steering Cylinder Overview

D128454 D84800 2X Power Steering Cylinder moves the steering linkage with a 16-1/4″ center-to-center closed measurement for owners of earlier B series vehicles.

Consistent steering response depends on a cylinder that matches the original stroke and mounting points of the vehicle’s hydraulic system. Using an incorrect cylinder can lead to mechanical interference or a limited turning radius.

The D128454 Power Steering Cylinder facilitates reliable steering for earlier B series vehicles by providing a 23″ center-to-center open measurement. This measurement defines the distance the piston head travels to provide full range of motion.

This review is for those seeking a replacement for part numbers 234447A1 or D128454. We selected this model from the 11 steering cylinders we evaluated because it had the most buyer ratings, with 65 ratings. Our evaluation is based on research of listing data.

The Short Answer on the D128454 Power Steering Cylinder

Best for: you need a set of two cylinders to replace part numbers 234447A1 or D84800 on an earlier B series vehicle.

The D128454 Power Steering Cylinder is a practical choice at the $169.99 price point.

• Pro: Includes two cylinders in one pack, reducing the cost to $85 per unit.
• Pro: Provides a 16-1/4″ center-to-center closed measurement for specific mounting requirements.
• Pro: Offers a 23″ center-to-center open measurement for maximum extension.
• Con: Requires hose adaptation for earlier B series, which may increase installation time.
• Con: Holds a 3.1 average from 65 buyer ratings, indicating a lower satisfaction level than higher-rated alternatives.

Don’t buy this if: your mounting points do not match the 16-1/4″ center-to-center closed specification.

Price assessment: The $169.99 price is fair for a dual-cylinder set that covers multiple common replacement part numbers.

If you are looking for a specific heavy equipment match, view our comparison of the best power steering cylinder for Case 580C 580D.

Owners of Ford 600 and 800 series models can find the top-rated power steering cylinder for Ford 600 800 here.

Full Specifications and Replaced Part Numbers for this Steering Cylinder

The 16-1/4″ center-to-center closed measurement determines the mounting distance for the cylinders in the closed position.

Before You Buy: Steering Cylinder Checklist

The first thing to check is whether your vehicle is an earlier B series model, as this determines your hose requirements.

• ☐ Confirm your model is a B series—this cylinder is designed to replace part numbers 234447A1, 234466A1, A137503, A51731, D128454, and D84800.
• ☐ Measure the center-to-center distance—the 16-1/4″ closed and 23″ open dimensions must match your mounting points to avoid mechanical interference from a stroke length mismatch.
• ☐ Verify your pump’s output pressure—the bore pressure rating must meet your system’s requirements to prevent a seal blowout or structural failure.
• ☐ Check if you have an earlier B series—you will need to adapt the power steering hoses because the standard fittings do not align with those older models.

You should not buy this product if your steering system requires a different mounting orientation or a bore pressure rating not supported by this specific cylinder’s design.

What These Specifications Let You Do

How the 16-1/4 inch closed dimension confirms mounting bracket alignment

The D128454 Power Steering Cylinder features a 16-1/4″ center-to-center closed dimension, which is the distance between the mounting points when the cylinder is in its retracted position. You can use this measurement to confirm that the mounting brackets on your vehicle line up with the cylinder’s mounting eyes before you order the part.

A 16-1/4″ closed measurement ensures the cylinder sits flush against the frame or mounting surface when the steering is centered. This specific spacing allows for the correct placement of the steering linkage, which is necessary to prevent the cylinder from binding or hitting the chassis during a full turn.

Compatibility with Earlier B Series

The D128454 Power Steering Cylinder is designed to fit earlier B series vehicles, though the listing notes that power steering hoses will need to be adapted for these specific models. You should identify your vehicle’s production year and series to confirm it falls within the compatible range before beginning the installation.

Because the hoses require adaptation, you may need to source different fittings or hose lengths to connect the cylinder to the existing steering system. This requirement means the cylinder provides the necessary hydraulic movement for the steering, but the fluid routing must be customized to fit the older chassis geometry.

Verifying compatibility through multiple original equipment replacement part numbers

The D128454 Power Steering Cylinder replaces several original equipment part numbers, including 234447A1, 234466A1, A137503, A51731, and D128454. You can use these numbers to verify that this cylinder is the correct functional equivalent for the specific component currently installed on your vehicle.

By supporting these multiple part numbers, the D128454 Power Steering Cylinder serves as a versatile replacement for various production runs of the B series. This broad compatibility ensures that the cylinder provides the correct stroke and bore pressure for the hydraulic requirements of the original steering system.

The D128454 Power Steering Cylinder Against Similar Steering Cylinders

The D128454 Power Steering Cylinder provides a dual-cylinder set that serves as a direct replacement for several OEM part numbers, including 234447A1 and D84800. By including two cylinders in one pack, this option offers a lower per-unit cost of $85 per cylinder compared to single-unit alternatives.

• The D128454 Power Steering Cylinder is $19.01 cheaper than the JEENDA Power Steering Cylinder D128454 234466A1 D84800.
• The D4NN3A540A Power Steering Cylinder 5/8″ Rod is $0.99 cheaper than this product.
• The BUYAUTOPARTS! 84-50012AN Power Steering Ram Assist Cylinder is $11.58 cheaper than this product.
• The Auto Pro USA PS1010 Power Steering Cylinder is $17 cheaper than this product.
• The D128454 D84800 234447A1 Power Steering Cylinder is $17.64 cheaper than this product.

If you need a single-unit cylinder with a one-year unlimited mileage warranty, the BUYAUTOPARTS! 84-50012AN Power Steering Ram Assist Cylinder is the alternative to consider.

For classic car restorations, see our spec breakdown for the best power steering ram for Chevy Nova Impala.

Setting Up This Steering Cylinder, and What Support Covers

Preparing a pressurized hydraulic system before installing this Steering Cylinder

Before you can install the D128454 Power Steering Cylinder, you must have a pressurized hydraulic system ready to supply the fluid.

1. Unpack the set of two cylinders from the packaging.
2. Identify the mounting points that match the 16-1/4″ center-to-center closed or 23″ center-to-center open dimensions.
3. Connect the hydraulic hoses to the cylinder ports to transmit pressurized fluid from the pump.
4. Secure the units using mounting hardware to the chassis or frame.

Warranty and Support: What to Check

Warranty coverage and support terms vary by seller and country.

• Confirm the rod diameter of a Hydraulic Seal Kit to ensure it matches the cylinder for leak repairs.
• Verify that the hydraulic hose fittings match your existing pump connections to prevent fluid loss.
• Check that the mounting hardware matches your vehicle’s frame thickness to ensure a secure fit.

Test the steering movement immediately upon installation to confirm the stroke length allows for full steering lock before the return window closes.

D128454 Power Steering Cylinder Buying Questions Answered

Is the D128454 Power Steering Cylinder a direct replacement for the A137503 or D84800?

Yes, the D128454 Power Steering Cylinder replaces the A137503 and D84800 part numbers. These are listed as compatible replacements, meaning the cylinder is designed to swap directly into the existing mounting points of your steering system.

How do the 16-1/4″ closed and 23″ open measurements affect my setup?

The 16-1/4″ center-to-center closed and 23″ center-to-center open measurements define the physical space the cylinder occupies during its movement. You must confirm your mounting points allow for this specific stroke, as a mismatch in these dimensions can prevent full steering lock or cause mechanical interference.

Is the D128454 Power Steering Cylinder a good deal for a set of two?

At the $169.99 price point, the D128454 Power Steering Cylinder costs around $85 per cylinder. This provides a pair of replacement units for a single purchase, which is a significant value for a dual-cylinder steering setup.

What does the center-to-center measurement actually tell me?

The center-to-center measurement indicates the distance between the mounting points of the cylinder. Think of it like the distance between two fence posts; if the posts aren’t exactly where the cylinder expects them to be, the part won’t align. The D128454 Power Steering Cylinder specifies a 16-1/4″ closed and 23″ open distance to ensure it fits the intended B series configuration.

You can learn more about the mechanics of this component by viewing our guide on how a steering cylinder works.

Is the D128454 Power Steering Cylinder Right for You?

Who the D128454 Power Steering Cylinder suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Steering Cylinder

When we looked in November 2026, the D128454 Power Steering Cylinder was listed at $169.99 – a snapshot that may have changed since.

Steering cylinders are sold by the retailers below – we do not track which of them has the D128454 Power Steering Cylinder in stock, so check availability and the current price with the retailer before making a trip.

• eBay (online only) — large marketplace for used, refurbished, and specialty heavy equipment components
• Jack’s Machinery (online only) — specialist for heavy equipment parts and hydraulic cylinders
• MachineryParts.com (online only) — specialist for heavy equipment and construction machinery components
• TractorSupply Co. (online and physical stores) — physical locations for common farm and utility vehicle maintenance parts
• PartsPro (online only) — wide selection of heavy equipment and industrial hydraulic components
• Amazon (online only) — broad range of aftermarket and OEM parts from multiple third-party sellers

Final Verdict on the D128454 Power Steering Cylinder

If you are replacing a standard hydraulic setup on an earlier B series vehicle, the D128454 Power Steering Cylinder is a specific fit. You can acquire this pair of cylinders for around $169.99.

The 16-1/4″ center-to-center closed measurement is the primary dimension for mounting. This distance determines the space between the cylinder’s mounting eyes when the rod is retracted. You must confirm your mounting points match this 16-1/4″ figure before ordering. The 23″ center-to-center open measurement defines the distance when the cylinder is fully extended. Because these are aftermarket replacements, power steering hoses will need to be adapted for earlier B series models.

The D128454 Power Steering Cylinder includes two units in a single pack. This provides a cost of $85 per cylinder. The 3.1 rating from 65 buyer ratings reflects the feedback from a large sample of users who purchased this specific pair.

You should choose the D128454 Power Steering Cylinder if you are restoring an earlier B series vehicle and require a matched pair of cylinders for a $169.99 replacement. It provides the specific 16-1/4″ closed and 23″ open dimensions required for this application.

The 3.1 rating from 65 buyer ratings serves as a significant data point for users seeking a high-volume replacement option. This sample size offers a clear view of the buyer experience for this specific pair.

Skip it if: your vehicle requires a different center-to-center closed distance than 16-1/4″ or if your existing hoses cannot be adapted to the earlier B series configuration.