Piston Pump and Motor Rotary Groups Supplied as Matched Sets
The rotary group is everything that turns and everything it turns against: cylinder block, pistons with shoes, retainer plate, ball guide, valve plate and springs. Buying it as a matched set matters because those parts bed in against each other. Sourcing them one at a time from different places is the most common reason a rebuild fails twice. We machine complete sets across the whole Rexroth pattern family from size 10 up to size 1000.
Series In This Category
Each page lists the frame sizes we machine and the parts available for that family.
A4VSO Series Rotary Groups
A4VSO and A4V rotary groups and spare parts in sizes 28 to 500, supplied as matched sets with cylinder block pistons valve plate and swash plate.
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A4VG Series Rotary Groups
A4VG closed circuit rotary groups and spare parts in sizes 28 to 500 for self propelled machine drive circuits, supplied as matched sets.
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A7VO and A8VO Series Rotary Groups
A7V A7VO and A8VO bent axis rotary groups and spare parts in sizes 28 to 1000 for excavator and heavy mobile main pumps.
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A10VO Series Rotary Groups
A10VO and A10VD rotary groups and spare parts in sizes 16 to 140 for compact excavators skid steers and industrial power units.
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A11VO Series Rotary Groups
A11VO rotary groups and spare parts in sizes 35 to 500 for concrete pumps drill rigs and heavy mobile work functions.
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A2F A2FO and A2FM Series Rotary Groups
A2F A2FO and A2FM fixed displacement bent axis rotary groups and spare parts in sizes 10 to 1000 for pump and motor duty.
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A6VM and A6V Series Rotary Groups
A6VM and A6V variable displacement motor rotary groups and spare parts in sizes 28 to 1000 for travel and drum drives.
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A10VG and A11VG Series Rotary Groups
A10VG and A11VG closed circuit rotary groups and spare parts in sizes 18 to 63 and 35 to 50 for compact hydrostatic drive circuits.
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Who This Category Suits and Where It Is Used
Typical Installations
- Excavator and loader main pump rebuild
- Hydrostatic drive pump and motor repair
- Industrial power unit and test bench overhaul
- Winch, drum and travel drive repair
Problems It Solves
- The pump has lost pressure and a strip found a scored block and shoes
- A large frame is quoted with months of lead time
- Mixed source parts did not bed in and the pump failed again
- The frame has been moved off the original price list
Why Buy This Category From Us
- Sets lapped and matched before packing
- Coverage from size 10 to size 1000 including the hard to find large frames
- Every part in the set also available singly
- Material, hardness and dimensional reports available with the order
Related Industry Applications
Construction Machinery
See the ApplicationMining and Quarry
See the ApplicationMarine and Offshore
See the Application
Related Project Cases
Excavator Travel Motor Rebuild Programme in Turkey
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Read the CaseMarine Winch Pump Refit for a Canadian Repair Yard
Read the Case
Frequently Asked Questions
What is included in a rotary group?
Can I buy just one part?
How do I know if the housing is still good?
Which sizes do you stock?
Do you supply documentation?
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.