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Company Culture ꄲ Fluid Power ꄲ Hydraulic Components ꄲ Rexroth A8VO107LA1KH1/60R1-NSG05F000 Variable Axial Piston Pump (Part No. R902024606)

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Rexroth A8VO107LA1KH1/60R1-NSG05F000 Variable Axial Piston Pump (Part No. R902024606)

Bosch Rexroth A8VO series bent-axis variable double pump, nominal displacement 2×107 cm³/rev, nominal pressure 350 bar / peak 400 bar, LA1KH1 individual power control (power override + hydraulic power coupling + hydraulic stroke limiter, negative control), with integrated auxiliary pilot pump and pressure-relief valve, for open-circuit hydrostatic drives in construction machinery.

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Product Details

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 LA1KH1 control, combining three functions:

Individual power control (LA1): automatically limits input power according to operating pressure; an external pilot pressure at port X3 can reduce the set power (power override);
Hydraulic power coupling (K): the two rotary groups' power controllers are hydraulically coupled for summation power control—both circuits swivel together; if one circuit uses less than 50% of total input power, the remaining power can be transferred to the other (up to 100% of total input power);
Hydraulic stroke limiter (H1, negative control): pilot pressure at X1 infinitely limits displacement; as pilot pressure rises the pump swivels toward smaller displacement (Vg max → Vg min). Control fluid is taken from the high-pressure line (≥30 bar); the depressurized initial position is Vg max.

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). 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 60, i.e. Series 6 / Index 0)
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	LA1KH1: individual power controller (X3 power override) + hydraulic power coupling + hydraulic stroke limiter (negative control, H1)
Stroke limiter	X1 pilot pressure 4–40 bar, Δp≈25 bar; rising pilot pressure reduces displacement (Vg max→Vg min); control fluid from high-pressure line, ≥30 bar
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. H1 negative control works with open-center pilot directional valves; control fluid is taken from the high-pressure line. The start of control (at Vg max) is adjustable 0–15 bar and must be specified in plain text when ordering. Mounting dimensions, port layout and power setting should be confirmed against the delivered technical documentation.

5. Model Information

Material / Ordering number: R902024606
Type code: A8VO107LA1KH1/60R1-NSG05F000
Product description: Rexroth A8VO series bent-axis variable axial piston double pump, size 107, LA1KH1 control (power override + hydraulic power coupling + hydraulic stroke limiter, negative control), Series 60, clockwise rotation, NBR seals, with integrated auxiliary pump and pressure-relief valve.
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: R902024606 is the official Bosch Rexroth material number corresponding to type code A8VO107LA1KH1/60R1-NSG05F000. This is a Series 60 (Index 0) earlier batch, sharing the main technical parameters with the same-size Series 61. H1 is negative-control stroke limiting (rising pilot pressure → smaller displacement), as opposed to H2 positive control (rising pilot pressure → larger displacement). If you have questions about suffixes such as NSG05, F000 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
- Hydraulic power coupling provides summation power distribution between circuits
- Hydraulic stroke limiter (H1 negative control) infinitely limits displacement via external pilot signal
- Individual power controller prevents input power overload, with X3 external pilot-pressure power override
- 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 open-center pilot directional valves for H1 negative control; 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 R902024606, distinguishing Series 60 from Series 61 and H1 negative control from H2 positive control 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, pilot valve configuration and power setting align with 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 does LA1KH1 control mean?

A: LA1KH1 = individual power controller (X3 pilot-pressure power override) + hydraulic power coupling (summation power control between circuits) + hydraulic stroke limiter (H1 negative control: rising X1 pilot pressure reduces displacement from Vg max to Vg min; control fluid is taken from the high-pressure line, ≥30 bar).

Q3: What is the difference between H1 negative and H2 positive control?

A: H1 (negative): rising pilot pressure reduces displacement (Vg max → Vg min), control fluid from the high-pressure line, used with open-center pilot valves. H2 (positive): rising pilot pressure increases displacement (Vg min → Vg max), requires external pilot supply via Y3. In both cases the power controller overrides the stroke limiter.

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 is the difference between Series 60 and Series 61?

A: Series 60 is Index 0 of the Series 6 platform (earlier batch); Series 61 is Index 1 (improved batch). Both belong to the A8VO Series 6 family with essentially the same main technical parameters; differences are in detail design and evolving options. Please rely on the full type code on the nameplate.

Q6: How do I confirm the ordering number matches my machine?

A: Please rely on the full type code A8VO107LA1KH1/60R1-NSG05F000 and material number R902024606 on your machine nameplate or service list, and confirm your pilot directional valves are open-center type (for H1 negative control). If in doubt, please email us for verification.

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