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Rexroth A8VO107LAXKS/61R1-NSN05F150-S Variable Axial Piston Pump (Part No. R902030624)
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 LAXKS control: a special-version individual power controller (the "X" denotes a customer-specific / special variant) combined with hydraulic power coupling (K) and load sensing (S). The LS regulator adjusts pump displacement according to the pressure drop across the metering orifice of an external directional valve, delivering flow on demand. The power controllers of both rotary groups are hydraulically coupled for summation power control—if one circuit uses less than 50% of total input power, the remaining power can be transferred to the other circuit.
This F version includes an integrated auxiliary pilot pump and pressure-relief valve. The pump can be mounted directly on a diesel engine flywheel housing and retains a power take-off (PTO). The trailing "-S" indicates a special version. 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 | LAXKS: special-version individual power controller + hydraulic power coupling (K) + load sensing (S) |
| Integrated auxiliary pump | Yes (F version), with pressure-relief valve |
| 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 "X" in LAXKS denotes a special / customer-specific control variant; its exact power setting and control characteristics should be confirmed on the nameplate or delivered technical documentation. Load sensing requires an external LS directional control valve.
5. Model Information
- Material / Ordering number: R902030624
- Type code: A8VO107LAXKS/61R1-NSN05F150-S
- Product description: Rexroth A8VO series bent-axis variable axial piston double pump, size 107, LAXKS control (special power controller + hydraulic power coupling + load sensing), Series 61, clockwise rotation, NBR seals, with integrated auxiliary pump and pressure-relief valve, special version (-S).
- 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: R902030624 is the official Bosch Rexroth material number corresponding to type code A8VO107LAXKS/61R1-NSN05F150-S. LAXKS is a special control variant (the "X" is not a standard LA0/LA1 code); its exact control characteristics and power setting should be confirmed on the product nameplate or delivered documentation. If you have questions about suffixes such as NSN05, F150, -S or cross-reference with the standard LA1KS version, 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
- Load sensing delivers flow on demand, reducing throttling and relief losses
- Hydraulic power coupling provides summation power distribution between circuits
- Integrated auxiliary pilot pump with pressure-relief valve; PTO allows an additional 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: Requires LS-type multi-circuit directional valves (e.g. Rexroth M4, RM series); axial piston pumps (e.g. A10VSO, A4V series) or gear pumps can be mounted via the PTO; electronic control 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 R902030624; LAXKS is a special control variant and is not substituted with the standard LA1KS version.
- 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, LS valve matching and applicability of the special control version.
- 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 does LAXKS control mean? How is it different from LA1KS?
A: LAXKS = special-version individual power controller (X variant) + hydraulic power coupling (K) + load sensing (S). The "X" indicates a customer-specific / special control variant for a particular application, differing from the standard LA1KS (standard power-override type) in power setting or control characteristics. Please verify on the product nameplate or delivered documentation; feel free to email us for details.
Q3: What is the benefit of load sensing (LS)?
A: The LS regulator maintains a constant pressure drop (Δp) across the external directional valve's metering orifice; the pump delivers only the flow demanded by the actuator, avoiding high-pressure overflow losses and improving efficiency and controllability.
Q4: What is hydraulic power coupling (K)?
A: The power controllers of both rotary groups are hydraulically connected so the two circuits swivel together. If one circuit draws less than 50% of total input power, the remaining power is automatically transferred to the other circuit (up to 100% of total input power), making full use of engine power.
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 A8VO107LAXKS/61R1-NSN05F150-S and material number R902030624 on your machine nameplate or service list. Since LAXKS is a special control variant, we recommend verifying the full configuration code on the nameplate before purchasing. If in doubt, please email us for verification.
