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Rexroth A8VO107LA1H2/61R1-NZG05K800 Variable Axial Piston Pump (Part No. R902009696)
1. Product Overview
The A8VO is a bent-axis design axial piston variable double pump by Bosch Rexroth, built for hydrostatic drives in open circuits. Two axial tapered piston rotary groups are integrated in one housing; the flow is proportional to the input speed and the displacement, and can be infinitely varied from qV max down to qV min = 0.
This model features LA1H2 control: an individual power controller automatically limits input power according to operating pressure, combined with power override via an external pilot pressure at port X3 (reducing the set power) and a hydraulic stroke limiter (positive control)—as pilot pressure rises, the pump swivels from Vg min toward Vg max.
This K version does not include an integrated auxiliary pilot pump or pressure-relief valve; pilot oil must be supplied from an external source through port Y3 (≥30 bar). The pump can be mounted directly on a diesel engine flywheel housing and retains a power take-off (PTO) for mounting additional pumps. It is widely used in excavators, cranes, drilling rigs and other multi-circuit mobile and industrial hydraulic systems.
2. Specifications
表格
| Item | Specification |
|---|---|
| Brand | Bosch Rexroth |
| Series | A8VO (Series 61, i.e. Series 6 / Index 1) |
| Design | Bent-axis axial piston variable double pump, open circuit |
| Nominal displacement Vg max | 2 × 107 cm³/rev |
| Min. displacement Vg min | 0 cm³/rev |
| Nominal pressure | 350 bar |
| Peak pressure | 400 bar |
| Max. input speed (at Vg max) nmax1 | 2150 rpm |
| Max. input speed (at Vg ≤ Vg max) nmax | 2450 rpm |
| Max. flow (at nmax, Vg max) qv max | 2 × 230 L/min |
| Max. power (at nmax, Vg max, Δp=350 bar) Pmax | 268 kW |
| Max. input torque Tmax | 1192 N·m |
| Shaft rotation | R (clockwise, viewed from drive shaft end) |
| Shaft end | Splined shaft per DIN 5480 |
| Seals | NBR |
| Control | LA1H2: individual power controller (X3 power override) + hydraulic stroke limiter (positive control, H2) + external pilot pressure supply |
| Stroke limiter | X1 pilot pressure 4–40 bar, Δp≈25 bar; rising pilot pressure increases displacement (Vg min→Vg max) |
| Integrated auxiliary pump | None (K version) |
| Pressure-relief valve | None |
| External pilot supply | Required from external source via port Y3 (≥30 bar); if not used, Y3 must be drained to tank |
| Power take-off (PTO) | Yes, for mounting axial piston or gear pumps |
| Approx. mass | Approx. 116 kg |
| Hydraulic fluid | Mineral oil (RE 90220); environmentally acceptable fluids (RE 90221); HF fluids (RE 90223); not suitable for HFA |
Theoretical values (without efficiency and tolerances), per A8VO official data sheet RE 93010. The K version has no integrated auxiliary pump; port Y3 must be connected to an external pilot pressure source (≥30 bar), or to tank if unused. The start of control (at Vg min) is adjustable 0–15 bar and must be specified in plain text when ordering.
5. Model Information
- Material / Ordering number: R902009696
- Type code: A8VO107LA1H2/61R1-NZG05K800
- Product description: Rexroth A8VO series bent-axis variable axial piston double pump, size 107, LA1H2 control (power override + hydraulic stroke limiter, positive control), Series 61, clockwise rotation, NBR seals, without integrated auxiliary pump.
- Official catalog description: Variable double pump A8VO with two axial tapered piston rotary groups of bent-axis design for hydrostatic drives in open circuits.
- Material number note: R902009696 is the official Bosch Rexroth material number corresponding to type code A8VO107LA1H2/61R1-NZG05K800. This is a K version (no integrated auxiliary pump), Series 61 (Index 1), sharing the main parameters with the same-control Series 60 version (e.g. R902009698 K14); differences are in batch evolution and connection configuration codes. If you have questions about suffixes such as NZG05, K800 or cross-reference alternatives, please contact us by email.
- Series features:
- Bent-axis dual rotary-group design, robust and long service life
- Flow proportional to speed and displacement, infinitely variable down to zero
- Individual power controller prevents input power overload, with X3 external pilot-pressure power override
- Hydraulic stroke limiter (H2 positive control) infinitely adjusts displacement via external pilot signal
- K version has no integrated auxiliary pump; an external pilot oil source is required
- PTO enables an additional axial piston or gear pump to be mounted
- Excellent power-to-weight ratio; direct mount on diesel flywheel housing
- Related sizes in series: A8VO55 (2×54.8 cm³), A8VO80 (2×80 cm³), A8VO140 (2×140 cm³), A8VO200 (2×200 cm³)
- Matching products: External pilot oil can be provided by Rexroth gear pumps (e.g. 1PF2G, PGH series); axial piston pumps (e.g. A10VSO, A4V series) can be mounted via the PTO; electronic power override can be implemented with BODAS controllers (RC series, see RE 95200 / 95201 / 95202 / 95203)
- Official document: Bosch Rexroth data sheet RE 93010 "Axial Piston Variable Double Pump A8VO, Series 61/63, Sizes 55…200"
6. Why Choose Us
- Exact model match: We verify supply against your full type code and material number R902009696, distinguishing K version (no auxiliary pump) from F version (with auxiliary pump) to avoid wrong shipment.
- Authorized channel supply: Bosch Rexroth hydraulic pumps supplied through regular channels, with product documentation available on request.
- Selection support: We help confirm displacement, pressure, speed and external pilot supply configuration match your machine's duty cycle.
- Delivery & after-sales: Quotation, lead-time confirmation and order follow-up provided; for any parameter questions or alternative options, please contact us by email.
7. FAQ
Q1: What is the displacement? Is it a single or double pump?
A: The A8VO107 is a variable double pump with two rotary groups, nominal displacement 2×107 cm³/rev (107 cm³/rev per circuit), adjustable down to 0.
Q2: What is the difference between K800 and F versions?
A: The key difference is the integrated auxiliary pilot pump: the K version (K800) has no integrated auxiliary pump or pressure-relief valve—pilot oil must be supplied externally through Y3; the F version includes an integrated auxiliary pilot pump and pressure-relief valve. The main pump parameters are otherwise identical.
Q3: What is the difference between this model and A8VO107LA1H2/60R1-NZG05K14 (R902009698)?
A: Both use the same LA1H2 control and K version (no auxiliary pump). Differences are: (1) Series 61 (Index 1) vs Series 60 (Index 0); (2) configuration codes K800 vs K14. Series 61 is the improved batch with essentially the same main technical parameters. Please verify mounting dimensions before replacement.
Q4: What does LA1H2 control mean?
A: LA1H2 = individual power controller (X3 pilot-pressure power override) + hydraulic stroke limiter (H2 positive control: rising X1 pilot pressure increases displacement from Vg min to Vg max). Since the K version has no integrated auxiliary pump, pilot oil must be supplied from an external control pressure source through port Y3 (≥30 bar).
Q5: What are the nominal and peak pressures?
A: Nominal pressure 350 bar, peak pressure 400 bar (per A8VO data sheet RE 93010, Series 61/63, sizes 55…200).
Q6: How do I confirm the ordering number matches my machine?
A: Please rely on the full type code A8VO107LA1H2/61R1-NZG05K800 and material number R902009696 on your machine nameplate or service list, and confirm your system already has an external pilot oil source (Y3 ≥30 bar). If in doubt, please email us for verification.
