Bosch Rexroth A11VG Series Variable Displacement Closed-Circuit Pump Parts & Rotary Group (A11VG12, A11VG19, A11VG50)
100% interchangeable rotary group & spare parts engineered for Bosch Rexroth A11VG high-pressure variable axial piston pumps, in-stock with OEM-grade quality.
- ✓100% Interchangeable
- ✓Durable & High-Wear Resistance
- ✓Large Stock & Fast Shipping
Key Specifications
Item | Details | |
Brand | HYLINK | |
Product Category | Hydraulic Variable Closed-Circuit Pump Spare Parts / Rotary Group / Overhaul Repair Kits | |
Compatible Brand | Replacement for Bosch Rexroth (A11VG Series) — 100% Interchangeable | |
Available Frame Sizes | A11VG12 / A11VG19 / A11VG50 | |
Applicable Machines | Heavy mobile machinery, earthmoving equipment, agricultural harvesters, forestry machines, and closed-circuit hydrostatic drives | |
Minimum Order Quantity | 1 Piece | |
Delivery Time | 1–3 days for in-stock items / 5–8 days for standard orders | |
Price | Inquire for a direct factory quote | |
Warranty | 6 months against manufacturing and material defects | |
Overview
HYLINK supplies precision-engineered Bosch Rexroth A11VG series (A11VG12, A11VG19, A11VG50) swashplate-design axial piston variable displacement pump replacement parts and complete rotary group overhaul kits. Specially designed for high-pressure closed-circuit hydrostatic transmissions, every component is manufactured to exact original tolerances and thoroughly inspected before shipment. This provides a high-performance, cost-effective replacement solution for hydraulic repair facilities, distributors, and equipment maintenance teams worldwide.
Product Overview
The Bosch Rexroth A11VG series variable displacement axial piston pumps serve as primary power components in heavy-duty closed-circuit hydrostatic transmissions. Operating under continuous high rotational speeds, reversing fluid flows, and severe mechanical load fluctuations, internal rotating assemblies—including the drive shaft, cylinder block, swashplate, pistons with slipper shoes, valve plate, and servo positioning mechanisms—undergo mechanical friction over extended operation. Surface wear on these critical contact interfaces leads to internal bypass leakage, operating temperature elevation, displacement output loss, and reduced system response.
HYLINK manufactures high-precision complete replacement rotary groups and individual spare parts across the A11VG frame sizes (12, 19, and 50 cm³/rev). Produced from premium forged alloy steel and high-wear-resistant bronze compositions, each component undergoes micron-level CNC machining and 3D CMM quality inspection. This enables service technicians and equipment rebuilders to overhaul worn closed-circuit rotating assemblies directly without replacing expensive outer pump housing structures.
Available Components
Below is the standard component list for Bosch Rexroth A11VG series hydraulic pumps. Individual spare parts and complete overhaul repair kits are both available:
Item No. | Part Name | Qty. |
1 | Splined Shaft | 1 |
2 | Cylinder Block | 1 |
3 | Ball Guide | 1 |
4 | Retainer Plate | 1 |
5 | Piston Slipper | 9 |
6 | Piston | 9 |
7 | Swash Plate | 1 |
8 | Valve Plate | 1 |
9 | Belleville Spring | 1 |
Quality Assurance & Manufacturing
Every HYLINK pump and replacement part undergoes strict quality control before shipment:
l Dimensional accuracy — checked with high-precision CMM (Coordinate Measuring Machines) to guarantee an exact fit with original pump housings.
l Material metallurgy — manufactured from premium forged steel and high-wear-resistant alloys to prevent premature fatigue.
l 100% performance test — every complete pump assembly is tested on our dynamic hydraulic test rig for pressure, flow rate and efficiency under full working load.
Packing, Shipping & Warranty
l Packaging — anti-rust protective film + heavy-duty foam cushioning + standard export fumigation-free wooden case (reinforced carton for small spare parts).
l Shipping — express courier (DHL / FedEx) for urgent repair orders; sea or air cargo for bulk orders.
l Warranty — 6 months quality assurance against manufacturing and material defects from the delivery date. In the event of a confirmed quality defect, HYLINK provides hassle-free replacement.
FAQ
Q: Are your SBS pump parts interchangeable with genuine Caterpillar parts?
A: Yes. All parts are produced to original specifications and dimensions and are 100% interchangeable — no modification is required during installation.
Q: What is the minimum order quantity?
A: 1 piece. We supply both individual components and complete rotary group / repair kits.
Q: How fast can you ship?
A: In-stock items are dispatched within 1–3 days; standard production orders take 5–8 days. Express and sea/air freight are both available.
Q: How do I confirm the correct part for my machine?
A: Send us your excavator model, pump model (SBS80 / SBS120 / SBS140) and the part name or photo — our technical team will confirm the correct item before you order.
Q: What warranty do you offer?
A: 6 months against manufacturing and material defects, with replacement support for confirmed quality issues.