Allied Hydraulic provides professional repair and rebuild services for Sundstrand hydraulic components used in mobile equipment, industrial machinery, and hydrostatic drive systems. We specialize in restoring Sundstrand pumps and motors to reliable operating condition, helping extend service life and minimize equipment downtime.
Allied Hydraulic has extensive experience servicing Sundstrand hydraulic components, including both legacy and widely used hydrostatic series. Our technicians understand the operating characteristics of Sundstrand pumps and motors and follow proven rebuild processes to restore performance, efficiency, and control response. Every component is inspected and tested before return to service.
Allied Hydraulic repairs and rebuilds Sundstrand hydraulic components commonly used in propulsion, drive, and auxiliary hydraulic systems. Common Sundstrand series serviced by our team include the following.
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Hydraulic Pumps
42 Series
90 Series
Hydraulic Motors
M35
M44
M46
These components are widely used in hydrostatic drive applications where precise control, reliability, and durability are critical.
Sundstrand hydraulic components operate under continuous load and tight tolerances, making them sensitive to wear and contamination over time. Allied Hydraulic commonly repairs:
Loss of pressure or reduced output flow
Internal leakage causing efficiency loss
Wear to rotating groups, pistons, and swash plates
Control instability or poor response in hydrostatic systems
Damage caused by hydraulic fluid contamination or overheating
All rebuilt Sundstrand components are tested to verify pressure, flow, and operational stability before returning to service.
Common symptoms include reduced machine power, slow response, overheating, unusual noise, or pressure fluctuations. These issues often point to internal wear or contamination.
Yes. Many Sundstrand hydrostatic pumps can be rebuilt to restore performance and extend service life, reducing the cost compared to replacement.
Sundstrand model and series information is typically stamped on the housing or identification plate. Providing this information helps ensure the correct specifications are used during rebuild.
Contaminated hydraulic fluid is one of the most common causes. Poor filtration, overheating, or delayed maintenance can significantly shorten component life.
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