Sourcing a Hydraulic Pump for the New Holland L775 Skid Steer

[MikePhua]

Quick answer
The New Holland L775 skid steer uses a Cessna hydraulic pump, part number 245600, which is now obsolete. Replacement options include locating NOS (new old stock), sourcing rebuilt units, or retrofitting with compatible aftermarket pumps using matched displacement and shaft geometry.
New Holland L775 background and hydraulic system
The New Holland L775 was introduced in the late 1970s as part of the company’s early skid steer lineup. It featured a mechanically simple design with chain-driven wheels, a gasoline engine (often a Wisconsin VH4D), and a gear-type hydraulic pump powering lift and tilt cylinders.
The hydraulic pump is mounted directly to the engine and drives fluid through a control valve to the loader arms and bucket. The original pump was manufactured by Cessna, a division of Eaton, and designated as part number 245600. It is a fixed-displacement gear pump with a splined shaft and SAE mounting flange.
Challenges of sourcing obsolete Cessna pumps
Cessna hydraulic components from this era are no longer in production. Eaton discontinued many legacy models after absorbing Cessna’s fluid power division. As a result:

• OEM dealers no longer stock the pump
  
• Aftermarket catalogs list it as obsolete
  
• Rebuild kits are rare and often incomplete
  
• Used pumps may be worn or mismatched
  

One operator searching for a replacement found that even salvage yards had limited inventory. The pump’s spline count, flange pattern, and displacement must match precisely to avoid mounting or performance issues.
Alternative sourcing strategies
To replace the pump, consider:

• NOS suppliers: Some regional hydraulic shops or online vendors may have unused stock
  
• Rebuilt units: Specialty rebuilders can restore old Cessna pumps if the housing and gears are intact
  
• Cross-reference with Eaton models: Some Eaton gear pumps match the displacement and mounting of the 245600
  
• Retrofit with modern gear pump: Requires matching shaft type, rotation direction, displacement (GPM), and pressure rating
  

When retrofitting, key parameters include:

• Displacement: Typically 6–12 GPM for the L775
  
• Operating pressure: Around 2,500 PSI
  
• Shaft type: 13-tooth spline or keyed shaft
  
• Mounting flange: SAE A or B pattern
  
• Rotation: Clockwise when viewed from shaft end
  

Installation and compatibility tips

• Measure the old pump’s bolt pattern and shaft dimensions before ordering
  
• Use thread sealant on fittings and torque to spec
  
• Flush the hydraulic system before installing a new pump
  
• Check for wear in the control valve and cylinders—pump failure may be a symptom, not the root cause
  

One technician noted that a mismatched pump caused erratic loader movement and overheating due to excess flow. After switching to a properly sized unit, performance normalized.
Conclusion
Replacing the hydraulic pump on a New Holland L775 requires careful matching of specifications due to the obsolescence of the original Cessna 245600 unit. While direct replacements are rare, NOS, rebuilt, or retrofitted pumps can restore functionality if displacement, shaft geometry, and mounting are verified. With proper sourcing and installation, the L775 can continue serving reliably despite its age.