Bosch Rexroth A7VO Series Variable Displacement Pump Parts & Rotary Group (A7VO28 to A7VO500)
100% interchangeable rotary group & spare parts engineered for Bosch Rexroth A7VO open-circuit 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 Displacement Pump Spare Parts / Rotary Group / Overhaul Repair Kits | |
Compatible Brand | Replacement for Bosch Rexroth (A7VO Series) — 100% Interchangeable | |
Available Frame Sizes | A7VO28 / A7VO55 / A7VO80 / A7VO107 / A7VO160 / A7VO200 / A7VO250 / A7VO355 / A7VO500 | |
Applicable Machines | Excavators, mobile cranes, concrete pumps, drilling rigs, marine winches, and industrial hydraulic power units | |
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 A7VO series (A7VO28, A7VO55, A7VO80, A7VO107, A7VO160, A7VO200, A7VO250, A7VO355, A7VO500) bent-axis axial piston variable pump replacement parts and complete rotary group overhaul kits. Specially designed for high-pressure open-circuit industrial drives and heavy mobile machinery, every part is manufactured to exact original tolerances and thoroughly inspected before shipment. This provides a high-performance, cost-effective replacement solution for repair shops, hydraulic distributors, and equipment maintenance teams worldwide.
Product Overview
The Bosch Rexroth A7VO series variable displacement axial piston pumps utilize a proven bent-axis design for open-circuit hydraulic systems. Operating under demanding load cycles and heavy continuous duty, internal rotating components—such as the drive shaft with pistons, cylinder block, valve plate, bearing plate, and center pin—undergo progressive mechanical wear over extended operation. Surface wear on these critical contact areas leads to reduced volumetric displacement, increased internal fluid bypass, thermal buildup, and pressure instability.
HYLINK manufactures high-precision complete replacement rotary groups and individual spare parts across all A7VO frame sizes from 28 to 500 cm³/rev. Produced from premium forged alloy steel and high-wear-resistant alloy compositions, each component undergoes micron-level CNC machining and CMM dimensional verification. This enables service engineers and equipment rebuilders to restore factory-level hydraulic pump performance without replacing expensive outer pump casings.
Available Components
Below is the standard component list for Bosch Rexroth A7VO series hydraulic pumps. Individual spare parts and complete overhaul repair kits are both available:
Item No. | Part Name | Qty. |
1 | Universal Ball Joint | 1 |
2 | Universal Joint | 1 |
3 | Valve Plate | 1 |
4 | Needle Roller Bearing | 1 |
5 | Bearing Plate | 1 |
6 | Push Rod 1 | 1 |
7 | Cylinder Block | 1 |
8 | Piston | 9 |
9 | Driving Ball | 6 |
10 | Push Rod 2 | 1 |
11 | Synchronization Shaft | 1 |
12 | Center Spring | 1 |
13 | Keyed Shaft | 1 |
14 | Piston Ring | 9 |
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.