Rexroth A8VO107LA1H2/61R1-NZG05F80X-S Variable Axial Piston Pump (Part No. R902042394)
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 the input power according to the 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) supplied by an external pilot pressure source to infinitely adjust the displacement. The pump can be mounted directly on a diesel engine flywheel housing, comes with an integrated auxiliary pilot pump and pressure-relief valve, and provides a power take-off (PTO) for mounting additional axial piston or gear pumps. It is widely used in excavators, cranes, drilling rigs, marine 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 (shaft seal ring in FKM) |
| Control | LA1H2: individual power controller + power override by pilot pressure + hydraulic stroke limiter (positive control) + external pilot pressure supply |
| Auxiliary pump | Integrated pilot pump with pressure-relief valve |
| Power take-off (PTO) | Yes, for mounting axial piston or gear pumps |
| Approx. mass | 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. Mounting dimensions, port layout and stroke-limiter start of control should be confirmed against the delivered technical documentation.
5. Model Information
- Material / Ordering number: R902042394
- Type code: A8VO107LA1H2/61R1-NZG05F80X-S
- Product description: Rexroth A8VO series bent-axis variable axial piston double pump, size 107, LA1H2 control, Series 61, clockwise rotation, NBR seals.
- 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: R902042394 is the official Bosch Rexroth material number corresponding to type code A8VO107LA1H2/61R1-NZG05F80X-S. If you have questions about the meaning or interchangeability of suffixes such as ZG05, F80X or S, 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
- Integrated auxiliary pilot pump with pressure-relief valve; external pilot pressure supply
- 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: Additional axial piston pumps (e.g. A10VSO, A4V series) or gear pumps 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 R902042394 to avoid shipping a wrong or substituted unit.
- Authorized channel supply: Bosch Rexroth hydraulic pumps supplied through regular channels, with product documentation available on request.
- Selection support: We help confirm that displacement, pressure, speed and control type 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 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).
Q3: What does LA1H2 control mean?
A: LA1H2 is an individual power controller with power override by pilot pressure (external pilot pressure at X3 reduces the set power), combined with a hydraulic stroke limiter (positive control) supplied from an external pilot pressure source—displacement increases from Vg min to Vg max as pilot pressure rises.
Q4: What hydraulic fluid can be used?
A: Mineral oil is recommended; choose the viscosity grade (e.g. VG 46 / VG 68, prefer the higher grade) according to operating temperature. Environmentally acceptable fluids and HF fluids are permitted subject to the restrictions in RE 90221 and RE 90223; HFA emulsions are not allowed.
Q5: What applications is this pump used for?
A: Open-circuit hydrostatic drives in excavators, cranes, drilling rigs, marine equipment, metallurgy, mining and forging presses, and other multi-circuit mobile and industrial hydraulic systems.
Q6: How do I confirm the ordering number matches my machine?
A: Please rely on the full type code A8VO107LA1H2/61R1-NZG05F80X-S and material number R902042394 on your machine nameplate or service list. If you have questions about configuration suffixes or cross-reference alternatives, please email us for verification.
