Cylinder Blocks Piston Shoes Valve Plates and Piston Rings
Not every repair needs a whole rotary group. Sometimes one shoe has picked up, or the valve plate is scored, or the piston rings have simply worn out and everything else measures good. These pages cover the parts we sell singly, what each one does, and how to judge whether replacing it on its own will actually fix the machine.
Series In This Category
Each page lists the frame sizes we machine and the parts available for that family.
Cylinder Blocks
Cylinder blocks for axial and bent axis piston pumps with sintered bronze running faces bonded and machined after sintering then lapped flat.
View Series and SizesPiston and Shoe Assemblies
Piston and shoe assemblies for axial piston pumps, swaged and checked for shoe clearance with hydrostatically balanced bronze shoe faces.
View Series and Sizes
Valve Plates and Swash Plates
Valve plates swash plates cradles retainer plates and ball guides for axial and bent axis piston pumps lapped and ground to the original drawing.
View Series and Sizes
Hydraulic Piston Rings
Piston rings for A2F A2FO A2FM A6V A6VM A7V A7VO and A8VO bent axis pumps and motors, ground and gap checked by size group.
View Series and Sizes
Who This Category Suits and Where It Is Used
Typical Installations
- Single part repairs where the rest of the group measures good
- Rebuild shops holding fast moving parts in stock
- Preventive replacement during a scheduled overhaul
- Repairing damage traced to one failed component
Problems It Solves
- One part has failed and a full rotary group is out of proportion
- The bronze face on the last replacement block lifted in service
- Cheap valve plates with the wrong timing notches made the pump noisy
- Piston rings for an older size group are not offered locally
Why Buy This Category From Us
- Every part machined to the drawing rather than copied from a worn sample
- Running faces ground and lapped after heat treatment
- Sets weight matched and clearance checked piece by piece
- Advice on whether a single part repair will hold before you order
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Frequently Asked Questions
Is it worth replacing only one part?
Which part usually wears first?
Do you machine to a sample or a drawing?
Are valve plates handed?
How are parts packed?
Send Us the Model Code and We Will Quote
Tell us the model code stamped on the pump, the quantity and your delivery port. A quotation with lead time usually comes back within one working day.