Variable displacement piston pumps, A10V series
Hydraulic pump · A10V(S)O · Variable displacement
How to order
A10V(S)O 71 DR / 31 R P S C 62 N00 — SO97
- A10V(S)O
- A10V(S)O pump
- 71
- Displacement (cm³/rev)
- DR
- Control device
- 31
- Series
- R
- Direction of rotation
- P
- Seals
- S
- Shaft
- C
- Mounting flange
- 62
- Service ports
- N00
- Thru-drive
- SO97
- Special suffix
Size and mounting
| cm³/rev | 10 | 18 | 28 | 45 | 60 | 63 | 71 | 74 | 100 | 140 |
|---|---|---|---|---|---|---|---|---|---|---|
| in³/rev | 0.61 | 1.10 | 1.71 | 2.75 | 3.66 | 3.84 | 4.33 | 4.51 | 6.10 | 8.54 |
Control devices
| Code | Description |
|---|---|
| DR | Pressure control |
| DRG | Remote pressure control |
| DFR | Pressure and flow control |
| DFR1 | Pressure and flow control (X-T port blocked) |
| DFLR | Pressure, flow and power |
| LA*D | Pressure, flow and power (series 53) |
Minimum control start (LA*D):
| Code | Range |
|---|---|
| LA5D | 10 to 35 bar (145 – 507 PSI) |
| LA6D | 36 to 70 bar (522 – 1015 PSI) |
| LA7D | 71 to 105 bar (1030 – 1523 PSI) |
| LA8D | 106 to 140 bar (1537 – 2031 PSI) |
| LA9D | 141 to 230 bar (2045 – 3336 PSI) |
Series
| Series | Displacements |
|---|---|
| 31 | 18, 28, 45, 71, 74, 100, 140 |
| 52/53 | 10, 45, 60/63 available |
Direction of rotation
Viewed from the shaft end.
| Code | Rotation |
|---|---|
| R | Clockwise |
| L | Counterclockwise |
Seals
| Code | Material |
|---|---|
| P | Buna-N (NBR per DIN ISO 1629) |
| V | FPM (fluorocarbon / Viton) |
| E | EPR |
Shafts
| Type | 10 | 18 | 28 | 45 | 60/63 | 71/74 | 100 | 140 | Code |
|---|---|---|---|---|---|---|---|---|---|
| Keyed | 3/4" | 3/4" | 7/8" | 1" | 1 1/4" | 1 1/4" | 1 1/2" | 1 3/4" | K |
| Splined | 3/4-11T | 3/4-11T | 7/8-13T | 1-15T | 1 1/4-14T | 1 1/4-14T | 1 1/2-17T | 1 3/4-13T | S |
| Heavy-duty “S” spline | — | 3/4-11T | 7/8-13T | 1-15T | 1 1/4-14T | 1 1/4-14T | 1 1/2-17T | — | R |
| Splined, non-thru-drive | 5/8-9T | 5/8-9T | 3/4-11T | 7/8-13T | 1-15T | 1-15T | 1 1/4-14T | — | U |
| Heavy-duty “U” spline | — | — | — | 7/8-13T | 1-15T | — | 1 1/4-14T | — | W |
| Full spline | — | — | — | — | 7/8-13T | — | — | — | Q |
| Keyed, metric | 18 mm | 18 mm | 22 mm | 25 mm | 32 mm | 32 mm | 40 mm | 45 mm | P |
Mounting flange
Pilot diameter (in / mm).
| Flange | 10 | 18 | 28 | 45 | 60/63 | 71/74 | 100 | 140 | Code |
|---|---|---|---|---|---|---|---|---|---|
| SAE 2-bolt | SAE A 3.25" | SAE A 3.25" | SAE B 4.0" | SAE B 4.0" | SAE B 4.0" | SAE C 5.0" | SAE C 5.0" | — | C |
| ISO 2-bolt, metric | 80 mm | 80 mm | 100 mm | 100 mm | — | 125 mm | 125 mm | — | A |
| SAE 4-bolt | — | — | — | — | SAE C 5.0" | — | — | SAE D 6.0" | D |
| ISO 4-bolt, metric | — | — | — | — | — | — | — | 180 mm | B |
Thru-drive
| Code | Description |
|---|---|
| N00 | No thru-drive |
| K** | Thru-drive for a secondary pump |
| Flange | Hub | Sealing | For mounting | Code |
|---|---|---|---|---|
| 82-2 (A) | 3/4" con chaveta (A-B) | Axial | A10V18 (K) | K40 |
| 101-2 (B) | 7/8" con chaveta (B) | Axial | A10V28 (K) | K03 |
| 101-2 (B-B) | 1" con chaveta (B-B) | Axial | A10V45 (K) | K05 |
| 127-2 (C) | 1-1/4" con chaveta (C) | Axial | A10V71 (K) | K08 |
| 127-2 (C) | 1-1/2" con chaveta (C) | Radial | A10V100 (K) | K38 |
| 152-4 (D) | 1-3/4" con chaveta (D) | Axial | A10V140 (K) | K21 |
| 82-2 (A) | 5/8" 9T (A) | Axial | A10V18 (U, W), 10 (U) | K01 |
| 82-2 (A) | 3/4" 11T (A-B) | Axial | A10V18 (S, R), 10 (S) | K52 |
| 101-2 (B) | 7/8" 13T (B) | Axial | A10V28 (S, R), 45 (U, W) | K68/K02 |
| 101-2 (B) | 1" 15T (B-B) | Axial | A10V45 (S, R), 60 (U, W) | K04 |
| 127-2 (C) | 1-1/4" 14T (C) | Axial | A10V71 (S, R), 100 (U, W) | K07/K15 |
| 127-2 (C) | 1-1/2" 17T (C-C) | Axial | A10V100 (S, R), 85 (S) | K24 |
| 152-4 (D) | 1-3/4" 13T (D) | Axial | A10V140 (S, R) | K17 |
Couplings for thru-drive units are sold separately.
Service ports
Codes 11 through 92 are 4-bolt flange ports, except where noted. Codes 14 and 64 are straight-thread O-ring ports (series 52/53).
| Code | Location | Thread | Notes |
|---|---|---|---|
| 11 | Rear | Metric thread | 1, 2 |
| 41 | Rear | Metric thread | 1, 2, 4 |
| 61 | Rear | UNC thread | 1, 2, 3 |
| 91 | Rear | UNC thread | 1, 2 |
| 12 | Side | Metric thread | — |
| 42 | Side | Metric thread | 4 |
| 62 | Side | UNC thread | 3 |
| 92 | Side | UNC thread | — |
| 14 | Rear | Metric straight thread | — |
| 64 | Rear | UNC straight thread | — |
- A10V28 through 140 only.
- All rear porting, non-thru-drive only.
- A10V71: 8 tapped holes in the pressure port, codes 61/91 and 62/92.
- A10V71 and 74 only.
Special suffix
| Code | Description |
|---|---|
| SO97 | Maximum volume adjustment stop (standard) |
| — | Omit if not required |
Available on all 52/53 designs and on design 31 with a side port.
*All manufacturer names and part numbers are used for reference only.
Performance data (A) A10V / VSO 18, 28, 45, 71, 74, 100 and 140, series 31
| Size | 18 | 28 | 45 | 71 | 100 | 140 |
|---|---|---|---|---|---|---|
| Displacement cm³/rev | 18 | 28 | 45 | 71 | 100 | 140 |
| Flow at 1800 rpm | 8.6 gpm 32.4 lpm | 13.2 gpm 50.4 lpm | 21.5 gpm 81.6 lpm | 33.7 gpm 128 lpm | 47.5 gpm 180 lpm | 66.5 gpm 252 lpm |
| Pressure | 4,000 PSI 280 bar | 4,000 PSI 280 bar | 4,000 PSI 280 bar | 4,000 PSI 280 bar | 4,000 PSI 280 bar | 4,000 PSI 280 bar |
| Peak pressure | 5,100 PSI 350 bar | 5,100 PSI 350 bar | 5,100 PSI 350 bar | 5,100 PSI 350 bar | 5,100 PSI 350 bar | 5,100 PSI 350 bar |
| Maximum flow | 15.7 gpm 59.4 lpm | 22 gpm 84 lpm | 31 gpm 117 lpm | 41 gpm 156 lpm | 53 gpm 200 lpm | 67 gpm 252 lpm |
| Maximum speed | 3,300 rpm | 3,000 rpm | 2,600 rpm | 2,200 rpm | 2,000 rpm | 1,800 rpm |
Performance data (A) A10V / V(S)O 10, 45, 60 and 63, series 52/53
| Size | 10 | 45 | 60 | 63 |
|---|---|---|---|---|
| Displacement cm³/rev | 10.5 | 45 | 60 | 63 |
| Flow at 1800 rpm | 4.99 gpm 18.5 lpm | 21.5 gpm 81 lpm | 28.4 gpm 107 lpm | 29.8 gpm 112.8 lpm |
| Pressure | 3,600 PSI 250 bar | 3,600 PSI 250 bar | 3,600 PSI 250 bar | 3,600 PSI 250 bar |
| Peak pressure | 4,000 PSI 315 bar | 4,000 PSI 315 bar | 4,000 PSI 315 bar | 4,000 PSI 315 bar |
| Maximum flow | 9.7 gpm 37 lpm | 31 gpm 117 lpm | 41 gpm 155 lpm | 43 gpm 163 lpm |
| Maximum speed | 3,600 rpm | 2,600 rpm | 2,600 rpm | 2,600 rpm |
A10VSO**/31 replacement parts
A10VS018/31
| Description | Part number |
|---|---|
| Saddle bearing kit | 85266 |
| Cradle (yoke) LH | 85263 |
| Cradle (yoke) RH | 85261 |
| Front bearing subassembly | 85371 |
| Lens plate LH | 85259 |
| Lens plate RH | 85258 |
| Rear bearing subassembly | 85372 |
| Rotating group (no lens plate) | 85257 |
| Buna seal kit | 85434 |
| EPR seal kit | 85600 |
| Viton seal kit | 85361 |
| Shaft “K”, non-thru-drive | 85262 |
| Shaft “P”, non-thru-drive | 85388 |
| Shaft “R”, non-thru-drive | 85253 |
| Shaft “S”, non-thru-drive | 85234 |
| Shaft “U”, non-thru-drive | 85379 |
| Shaft “K”, thru-drive | 85462 |
| Shaft “S”, thru-drive | 85451 |
A10VS028/31
| Description | Part number |
|---|---|
| Saddle bearing kit | 85133 |
| Cradle (yoke) LH | 85119 |
| Cradle (yoke) RH | 85118 |
| Front bearing subassembly | 85366 |
| Lens plate LH | 85107 |
| Lens plate RH | 85106 |
| Rear bearing subassembly | 85367 |
| Rotating group (no lens plate) | 85140 |
| Buna seal kit | 85130 |
| Viton seal kit | 85136 |
| EPR seal kit | 85667 |
| Shaft “P”, keyed | 85429 |
| Shaft “K”, non-thru-drive | 85112 |
| Shaft “R”, non-thru-drive | 85448 |
| Shaft “S”, non-thru-drive | 85113 |
| Shaft “K”, thru-drive | 85181 |
| Shaft “R”, thru-drive | 85254 |
| Shaft “S”, thru-drive | 85220 |
A10VS045/31
| Description | Part number |
|---|---|
| Saddle bearing kit | 85134 |
| Cradle (yoke) LH | 85121 |
| Cradle (yoke) RH | 85120 |
| Front bearing subassembly | 85230 |
| Lens plate LH | 85109 |
| Lens plate RH | 85108 |
| Rear bearing subassembly | 85231 |
| Rotating group (no lens plate) | 85141 |
| Buna seal kit | 85272 |
| EPR seal kit | 85684 |
| Viton seal kit | 85245 |
| Shaft “K”, non-thru-drive | 85114 |
| Shaft “R”, non-thru-drive | 85365 |
| Shaft “S”, non-thru-drive | 85115 |
| Shaft “U”, non-thru-drive | 85229 |
| Shaft “P”, keyed, non-thru-drive | 85291 |
| Shaft “K”, thru-drive | 85211 |
| Shaft “P”, thru-drive | 85697 |
| Shaft “S”, thru-drive | 85216 |
| Shaft “T”, thru-drive | 85535 |
| Shaft “U”, thru-drive | 85149 |
A10VS071/31
| Description | Part number |
|---|---|
| Saddle bearing kit | 85135 |
| Cradle (yoke) LH | 85123 |
| Cradle (yoke) RH | 85122 |
| Front bearing subassembly | 85201 |
| Lens plate LH | 85111 |
| Lens plate RH | 85110 |
| Rear bearing subassembly | 85228 |
| Rotating group (no lens plate) | 85142 |
| Buna seal kit | 85132 |
| EPR seal kit | 85687 |
| Viton seal kit | 85138 |
| Shaft “K”, non-thru-drive | 85116 |
| Shaft “P”, non-thru-drive | 85431 |
| Shaft “S”, non-thru-drive | 85117 |
| Shaft “K”, thru-drive | 85209 |
| Shaft “R”, thru-drive | 85255 |
| Shaft “S”, thru-drive | 85151 |
A10VS0100/31
| Description | Part number |
|---|---|
| Saddle bearing kit | 85264 |
| Cradle (yoke) LH | 85329 |
| Cradle (yoke) RH | 85328 |
| Front bearing subassembly | 85241 |
| Lens plate LH | 85326 |
| Lens plate RH | 85327 |
| Rear bearing subassembly | 85542 |
| Rotating group (no lens plate) | 85204 |
| Buna seal kit | 85331 |
| EPR seal kit | 85665 |
| Viton seal kit | 85243 |
| Shaft “K”, non-thru-drive | 85330 |
| Shaft “P”, non-thru-drive | 85443 |
| Shaft “S”, non-thru-drive | 85333 |
| Shaft “U”, non-thru-drive | 85332 |
| Shaft “K”, thru-drive | 85442 |
| Shaft “P”, thru-drive | 85622 |
| Shaft “S”, thru-drive | 85386 |
| Shaft “U”, thru-drive | 85387 |
| Shaft “W”, thru-drive | 85529 |
A10VS0140/31
| Description | Part number |
|---|---|
| Saddle bearing kit | 85265 |
| Cradle (yoke) LH | 85340 |
| Cradle (yoke) RH | 85339 |
| Front bearing subassembly | 85363 |
| Lens plate LH | 85337 |
| Lens plate RH | 85232 |
| Rear bearing subassembly | 85362 |
| Rotating group (no lens plate) | 85200 |
| Buna seal kit | 85439 |
| EPR seal kit | 85686 |
| Viton seal kit | 85244 |
| Shaft “K”, non-thru-drive | 85440 |
| Shaft “S”, non-thru-drive | 85344 |
| Shaft “K”, thru-drive | 85341 |
| Shaft “S”, thru-drive | 85470 |
Other components
- Couplings for thru-drive shafts and seals
- Piston, spring, bolt and washer kits
- Multiple pressure control options
- Valve blocks (porting) LH and RH
A10VSO**/52/53 replacement parts
A10VS010/52/53
| Description | Part number |
|---|---|
| Saddle bearing kit | 85578 |
| Cradle (yoke) LH | 85576 |
| Cradle (yoke) RH | 85577 |
| Front bearing subassembly | 85746 |
| Lens plate LH | 85574 |
| Lens plate RH | 85573 |
| Rear bearing subassembly | 85745 |
| Rotating group (no lens plate) | 85572 |
| Buna seal kit | 85579 |
| EPR seal kit | 85690 |
| Viton seal kit | 85656 |
| Shaft “K”, keyed SAE | 85692 |
| Shaft “P”, keyed metric | 85580 |
| Shaft “S”, splined SAE | 85636 |
| Shaft “U”, splined SAE | 85660 |
A10VS045/52/53
| Description | Part number |
|---|---|
| Saddle bearing kit | 85146 |
| Cradle (yoke) LH | 85351 |
| Cradle (yoke) RH | 85352 |
| Lens plate LH | 85109 |
| Lens plate RH | 85108 |
| Rotating group (no lens plate) | 85141 |
| Buna seal kit | 85131 |
| EPR seal kit | 85689 |
| Viton seal kit | 85137 |
| Shaft “K”, non-thru-drive | 85114 |
| Shaft “P”, keyed metric, non-thru-drive | 85291 |
| Shaft “R” “1” 15T, non-thru-drive | 85365 |
| Shaft “S”, splined, non-thru-drive | 85115 |
| Shaft “U”, splined, non-thru-drive | 85229 |
| Shaft “W”, splined, non-thru-drive | 85668 |
| Shaft “K”, keyed, thru-drive | 85211 |
| Shaft “P”, keyed metric, thru-drive | 85697 |
| Shaft “R”, thru-drive | 85170 |
| Shaft “S”, splined, thru-drive | 85216 |
| Shaft “T”, thru-drive, 7/8" OD | 85535 |
| Shaft “U”, splined, thru-drive | 85149 |
| Shaft “W”, splined, thru-drive | 85608 |
A10VS060/63/52/53
| Description | Part number |
|---|---|
| Saddle bearing kit | 85491 |
| Cradle (yoke) LH | 85485 |
| Cradle (yoke) RH | 85484 |
| Front bearing subassembly | 85489 |
| Lens plate LH | 85483 |
| Lens plate RH | 85482 |
| Rear bearing subassembly | 85490 |
| Rotating group (no lens plate) | 85566 |
| Buna seal kit | 85210 |
| EPR seal kit | 85688 |
| Viton seal kit | 85492 |
| Shaft “K”, keyed, non-thru-drive | 85478 |
| Shaft “R”, splined, non-thru-drive | 85486 |
| Shaft “S”, splined, non-thru-drive | 85487 |
| Shaft “U”, splined, non-thru-drive | 85488 |
A10V part identifier
Model code
Image 1
| No. | Description |
|---|---|
| 1 | Rotating group |
| 2 | Control assembly |
| 3 | Housing |
| 4 | Valve block |
| 5 | Cradle assembly |
| 6 | Shaft |
| 7 | Washer |
| 8 | Adjusting disc |
| 9 | Front bearing assembly |
| 10 | Rear bearing assembly |
| 11 | Cradle bearing |
| 12 | Shaft seal |
| 13 | O-ring |
| 14 | O-ring |
| 15 | Snap ring |
| 16 | Cap screws |
| 17 | Compensator |
| 18 | Plug |
| 18A | O-ring |
| 19 | Dowel pins |
| 20 | Plug |
| 21 | Key |
| 22 | Coupling |
| 23 | Cap screw |
| 24 | O-ring |
| 25 | Plug |
Image 2
| No. | Description |
|---|---|
| 1 | Pistons |
| 2 | Barrel |
| 3 | Lens plate |
| 4 | Retainer plate |
| 5 | Retaining ball |
| 6 | Spring |
| 7 | Pressure pins |
| 8 | Retaining clip |
| 9 | Retaining ring |
Image 3
| No. | Description |
|---|---|
| 1 | Control piston |
| 2 | Piston guide |
| 3 | Counter piston |
| 4 | Piston guide |
| 5 | Spring |
Piston pump, variable displacement · A4VS · Open circuit
How to order
A4VS O 40 DR 10 R P K D 63 N00
- A4VS
- Variable displacement piston pump
- O
- Open circuit design
- 40
- Displacement and flange
- DR
- Control
- 10
- Series
- R
- Direction of rotation
- P
- Seals
- K
- Shaft
- D
- Mounting flange / pilot
- 63
- Port connections on the side
- N00
- Through drive
1. A4VS
Piston pump, variable displacement A4VS
2. Circuit
| Code | Design |
|---|---|
| O | Open circuit |
3. Displacement
| Displacement | Flange |
|---|---|
| 40 cc (2.44 in³) | C 4 / 125 |
| 71 cc (4.33 in³) | C 4 / 140 |
| 125 cc (7.63 in³) | D 4 / 160 |
| 180 cc (10.98 in³) | D 4 / 160 |
| 250 cc (15.26 in³) | E 4 / 224 |
| 355 cc (21.66 in³) | E 4 / 224 |
4. Control options
| Code | Control |
|---|---|
| DR | Pressure |
| DRG | Remote pressure |
| FR | Flow |
| DFR | Pressure and flow |
| LR2 | Hyperbolic HP curve |
5. Series
| Code | Series |
|---|---|
| 10 | Size 40 & 71 |
| 30 | Size 125–355 |
6. Rotation (viewed from the shaft end)
| Code | Rotation |
|---|---|
| R | Clockwise |
| L | Counterclockwise |
7. Seals
| Code | Seals |
|---|---|
| P | Buna with Viton shaft seal |
| V | Viton |
8. Shaft options
| Code | Shaft | 40 | 71 | 125 | 180 | 250 | 355 |
|---|---|---|---|---|---|---|---|
| K | SAE keyed | 1.25" | 1.50" | 1.75" | 2.00" | 2.00" | 2.75" |
| S | SAE splined | 14T | 17T | 13T | 15T | 15T | 15T |
| P | Metric keyed | 32 | 40 | 50 | 50 | 60 | 70 |
| Z | Metric splined | 14T | 18T | 24T | 24T | 28T | 22T |
9. Mounting flange / pilot
| Code | Flange |
|---|---|
| B | Metric 4 bolt |
| D | SAE 4 bolt |
10. Port connections on the side
| Code | Connection |
|---|---|
| 13 | 4 bolt flange, metric bolts |
| 63 | 4 bolt flange, UNC bolts |
| 75 | 4 bolt flange, UNC bolts, with 2nd pressure port |
11. Through drive
| Code | Drive |
|---|---|
| N00 | Non-thru |
| K** | Ready to mount pump |
| U99** | Capped universal thru drive. Requires U adapter and coupling |
| Flange or adaptor | Flange | Coupling |
|---|---|---|
| K/U 01 | SAE A2 | 5/8"-9T |
| K/U 52 | SAE A2 | 3/4"-11T |
| K/U 04 | SAE B2 | 1"-15T |
| K/U 68 | SAE B2 | 7/8"-13T |
| K/U 07 | SAE C2 | 1.25"-14T |
| K/U 24 | SAE C2 | 1.50"-17T |
| K/U 15 | SAE C4 | 1.25"-14T |
| K/U 16 | SAE C4 | 1.50"-17T |
| K/U 17 | SAE D4 | 1.75"-13T |
| U 78 | SAE D4 | 2.00"-15T |
| U 18 | SAE E4 | 2.00"-15T |
Maximum operating pressure
| Pressure | Limit |
|---|---|
| 5000 psi (350 bar) | Nominal |
| 5800 psi (400 bar) | Peak pressure |
*All manufacturer names and part numbers are used for reference only.
Table of values (theoretical values, without considering efficiencies and tolerances; values rounded off).
| Size | 40 | 71 | 125 | 180 | 250 |
|---|---|---|---|---|---|
| Displacement, Vg max, in³ (cm³) | 2.44 (40) | 4.33 (71) | 7.63 (125) | 11.0 (180) | 15.26 (250) |
| Maximum speed at Vg max, no max, rpm 2) | 2600 | 2200 | 1800 | 1800 | 1500 |
| Maximum speed at Vg ≤ Vg max (speed limit), no max perm., rpm | 3200 | 2700 | 2200 | 2100 | 1800 |
| Flow at no max, qvo max, gpm | 27.5 | 41.2 | 59.4 | 85.6 | 99.1 |
| Power at no max, Δp = 5100 psi (350 bar), Po max, HP (kW) | 81 (61) | 122 (91) | 176 (131) | 254 (189) | 294 (219) |
| Torque at Vg max, Δp = 5100 psi (350 bar), Tmax, lb-ft (Nm) | 165 (223) | 292 (395) | 516 (696) | 744 (1002) | 1032 (1391) |
| Torque, Δp = 1450 psi (100 bar), T, lb-ft (Nm) | 47 (64) | 83 (113) | 147 (199) | 211 (286) | 294 (398) |
| Rotary stiffness, shaft end K, c, klb-ft/rad | 57 | 106 | 175 | 235 | 322 |
| Rotary stiffness, shaft end S, c, klb-ft/rad | 49 | 92 | 141 | 202 | 267 |
| Rotary stiffness, shaft end P, c, klb-ft/rad | 80 | 146 | 260 | 328 | 527 |
| Rotary stiffness, shaft end Z, c, klb-ft/rad | 77 | 146 | 263 | 332 | 543 |
| Moment of inertia, rotary group, JTW, lb-ft² | 0.116 | 0.287 | 0.712 | 1.305 | 2.276 |
| Maximum angular acceleration 4), α, rad/s² | 17000 | 11000 | 8000 | 6800 | 4800 |
| Case volume, V, gal (L) | 0.5 (2) | 0.6 (2.5) | 1.3 (5) | 1.0 (4) | 2.6 (10) |
| Weight with pressure control, approx., m, lbs | 86 | 117 | 194 | 225 | 406 |
2) Values are valid with inlet pressure pabs 14.5 psi (1 bar) at inlet port S. With increased speed up to the speed limit, observe the diagram on page 7.
3) Vg < Vg max
4) The range of validity lies between zero and the maximum permissible drive speeds. Valid for external excitation (for example, a diesel engine at 2- to 8-fold rotary frequency, or a cardan shaft at 2-fold rotary frequency). The limiting value is only valid for a single pump. The loading capacity of the connecting parts must be considered.
Notes
Exceeding the maximum or falling below the minimum permissible values can lead to a loss of function, a reduction in operational service life, or total destruction of the axial piston unit. The permissible values can be determined through calculation.
| No. | Description | Qty | 40 | 71 | 125 | 180 | 250 |
|---|---|---|---|---|---|---|---|
| 1 | Lens plate RH | 1 pc | 85760 | 85320 | 85295 | 85303 | 85312 |
| Lens plate LH | 1 pc | 85761 | 85321 | 85294 | 85598 | 85311 | |
| 2 | Cylinder block | 1 pc | 85762 | 85322 | 85296 | 85304 | 85313 |
| 7 | Ball guide | 1 pc | 85763 | 85393 | 85297 | 85305 | 85314 |
| 8 | Retaining plate | 1 pc | 85764 | 85395 | 85298 | 85306 | 85315 |
| 10 | Piston kit with shoe | 9 pcs | 85768 | 85768 | 85768 | 85768 | 85768 |
| 11 | Thrust plate | 1 pc | — | 85396 | 85300 | 85308 | 85317 |
| Shaft “P”, keyed, non-thru | 1 pc | 85769 | 85421 | 85425 | 85426 | 85769 | |
| 12 | Shaft “Z”, splined, non-thru | 1 pc | 85770 | 85604 | 85302 | 85310 | 85319 |
| Shaft “K”, keyed, non-thru | 1 pc | 85772 | 85624 | 85626 | 85628 | 85630 | |
| Shaft “S”, splined, non-thru | 1 pc | 85771 | 85625 | 85627 | 85629 | 85631 | |
| Rotating group RH, items 1-11 | 1 pc | 85766 | 85417 | 85412 | 85414 | 85415 | |
| Rotating group LH, items 1-11 | 1 pc | 85767 | 85418 | 85413 | 85599 | 85416 | |
| A4VSO bearing kit S/A* | 1 pc | 85765 | 85397 | 85609 | 85612 | 85615 | |
| A4VSO Viton seal kit, 30 design | 1 pc | 85775 | 85602 | 85611 | 85614 | 85617 | |
| A4VSO Buna seal kit, 30 design | 1 pc | 85774 | 85618 | 85610 | 85613 | 85616 |
*Bearing kit S/A consists of 2 saddle bearings, 1 valve-block bearing and 1 shaft bearing.
Rexroth-style A10V, A10VO, A10VSO and A4V hydraulic pumps
Rexroth-style A10V, A10VO, A10VSO and A4V hydraulic pumps are references used to identify variable-displacement axial piston pumps for different industrial and mobile hydraulic applications. Depending on the family and the specific configuration, these pumps can regulate hydraulic flow to meet the needs of the machine.
At Technical Union we offer supply solutions for applications that require A10V/A10VO/A10VSO and A4V style hydraulic pumps, including replacements and alternatives for equipment that uses pumps from these families as a reference.
We handle inquiries from industrial distributors, machinery manufacturers, maintenance companies and hydraulic spare-parts buyers looking for replacement pumps for their equipment.
Applications of A10V, A10VSO and A4V pumps
Variable-displacement axial piston pumps can be used in hydraulic systems where flow must be regulated to control cylinders, hydraulic motors and other actuators. The specific applications depend on the model, the hydraulic circuit and the operating requirements.
Industrial and mobile applications include:
- Hydraulic cylinder drives
- Lifting and lowering systems
- Hydraulic presses
- Machine tools
- Metal forming and fabrication equipment
- Hydraulic clamping systems
- Industrial processing machines
- Material handling systems
- Plastic injection molding machines
- Construction equipment
- Agricultural machinery
- Forestry equipment
- Earth-moving machinery
- Hydraulic systems for specialized machinery
- Industrial production equipment
Variable-displacement pumps let the flow be matched to the needs of the system. The right selection depends on pressure, operating speed, required displacement and the type of hydraulic control.
Machines that use Rexroth-style A10V and A10VSO pumps
Pumps in the A10V, A10VO and A10VSO families can be used in different types of machinery, depending on the hydraulic configuration and the equipment specifications.
Industrial machinery
- Production hydraulic presses
- CNC machine tools
- Lathes and milling machines with hydraulic systems
- Metal cutting and bending machines
- Sheet-metal forming machines
- Injection molding machines
- Metal-component manufacturing equipment
- Hydraulic clamping systems
- Industrial assembly machines
- Material handling equipment
Mobile machinery
- Hydraulic excavators
- Wheel loaders
- Backhoes
- Earth-moving equipment
- Agricultural machinery
- Forestry equipment
- Road maintenance machines
- Mobile equipment with hydraulic cylinders and motors
On mobile machinery, the pump can supply flow to functions such as arm, boom and bucket movement, lift cylinders and hydraulic implements.
The choice between an A10VO-style pump, an A10VSO-style pump or another A10V configuration depends on the hydraulic circuit, the displacement, the working pressure, the speed and the control system.
A10VO pumps for mobile machinery
A10VO-style pumps are sought for mobile applications that need variable-displacement axial piston pumps for open hydraulic circuits, according to the matching configuration.
Possible applications include excavators, loaders, backhoes, agricultural machinery, forestry equipment and material-moving machines.
For example, a hydraulic excavator can use its hydraulic system to control the boom, the arm, the bucket and the implements. A wheel loader can use cylinders to raise and tilt the bucket, while an agricultural machine can actuate cylinders to position implements and perform auxiliary functions.
To find a replacement, the complete pump model and the characteristics of the machine’s hydraulic circuit have to be compared.
A10VSO pumps for industrial applications
A10VSO-style pumps are sought for stationary industrial hydraulic systems that need variable displacement and open-circuit operation, according to the model specifications.
Some applications include:
- Hydraulic presses
- CNC machine tools
- Industrial manufacturing lines
- Metal forming machines
- Plastic injection molding machines
- Automated production equipment
- Industrial lifting systems
- Material handling equipment
- Hydraulic systems for specialized machinery
- Manufacturing and assembly equipment
In these applications, the pump can supply the flow needed to operate cylinders, hydraulic motors, valves and other circuit components.
Selection should take into account the working pressure, the displacement, the type of control and the machine’s operating conditions.
Rexroth-style A4V hydraulic pumps
A4V-style hydraulic pumps are another reference family used to identify variable-displacement axial piston pumps and to look for replacement alternatives for certain hydraulic systems.
Depending on the variant, the specific model can differ in hydraulic circuit, control, displacement and operating conditions. The exact configuration should be identified before a replacement pump is selected.
A4V-style pumps can be considered for hydraulic applications that need variable flow and a capacity suited to the demands of the machine.
Applications of A4V pumps
Potential applications depend on the pump configuration and the circuit it was designed for. Industrial equipment that may need pumps from this family, or compatible alternatives, includes:
- Industrial hydraulic presses
- High-demand hydraulic systems
- Metal forming and processing machines
- Industrial manufacturing equipment
- Machine tools
- Hydraulic drive systems
- Specialized production equipment
- Industrial machinery with hydraulic cylinders
- Equipment with hydraulic motors
- Hydraulic systems for mobile machinery, when the configuration is compatible
On a hydraulic press, for example, the circuit can use the pump to supply flow to the main cylinder and control the different operating phases. On specialized industrial machinery, the pump can feed actuators that need specific pressure and flow characteristics.
Not every A4V variant is suitable for the same applications. Confirm whether the equipment needs an open or closed circuit, as well as the type of control and the other technical parameters.
Machines and industries that may need A4V pumps
Metalworking industry
- Forming presses
- Stamping presses
- Bending machines
- Metal-component manufacturing equipment
- Hydraulic clamping systems
Machinery and manufacturing industry
- Machine tools
- Industrial production equipment
- Assembly machines
- Hydraulic drive systems
- Special industrial machinery
Plastics and processing industry
- Injection molding machines, according to the circuit requirements
- Hydraulic production equipment
- Clamping and drive systems
- Industrial processing machinery
Other sectors
- Heavy machinery manufacturing
- Industrial equipment maintenance and repair
- Process automation with hydraulic drives
- Hydraulic system integration and repair
These are examples of machine types and applications that may need axial piston pumps. Compatibility with an A4V-style pump should be confirmed against the original model and the specifications of each piece of equipment.
A10V, A10VO, A10VSO and A4V pump replacement
When a hydraulic pump needs to be replaced, it is important to check the complete model and the characteristics of the installed unit.
Technical Union handles inquiries from buyers looking for Rexroth-style pumps and replacement alternatives identified by A10V, A10VO, A10VSO and A4V references.
To evaluate a possible replacement, it is worth reviewing:
- Complete model and code of the original pump
- Nominal size and displacement
- Working pressure and required maximum pressure
- Rotational speed
- Direction of rotation
- Type of hydraulic circuit
- Control system
- Shaft configuration
- Mounting type
- Hydraulic connections
A pump from the same family, or with a similar designation, is not necessarily a direct replacement. Compatibility should be verified before the selection is confirmed.
A10V, A10VO, A10VSO and A4V references can help identify the product being sought, but the final selection should be based on the technical specifications and the needs of the machine.
Do you need to replace an A10V, A10VSO or A4V pump?
If you are looking for a Rexroth-style A10V, A10VO, A10VSO or A4V hydraulic pump, send us the part number, the complete code or a photo of the nameplate on the pump you want to replace.
We can review the required configuration and evaluate a replacement suited to your application.
Technical Union works with industrial customers and distributors in Mexico, Central America, South America and other Latin American markets, with supply and export options from the United States, subject to availability and the conditions of the order.
Send us the part number of your A10V/A10VO/A10VSO/A4V pump to request a quote.