The Rexroth A4VSO axial piston pump is widely used in excavators and industrial hydraulic systems. While reliable, long-term heavy-duty operation can lead to failures such as unstable pressure, noise, leakage, or overheating. This article summarizes the most common problems and spare parts solutions.
Noise and Vibration – caused by worn piston shoes or cylinder block.
Pressure Instability – valve plate wear or control piston leakage.
Internal Leakage – damaged seals or scoring in the cylinder block.
Overheating – excessive friction, oil contamination, or clogged filters.
Shaft Seal Failure – due to shaft wear or improper case drain routing.
| Failure / Symptom | Possible Root Cause | Recommended Spare Parts |
|---|---|---|
| Noise & Vibration | Worn piston shoes, cylinder block wear | Piston shoe set, Cylinder block, Swash plate |
| Pressure Instability | Valve plate wear, control piston leakage | Valve plate, Control piston kit, Spring set |
| Internal Leakage | Damaged seals, cylinder block scoring | Seal kit, Cylinder block, Drive shaft |
| Overheating | Friction, contaminated oil, clogged filter | Piston/cylinder kit, Filter element, Oil flushing |
| Shaft Seal Failure | Shaft wear, high case pressure | Drive shaft, Front oil seal, Case drain check |
Cylinder block, valve plate, piston shoe set, retainer plate, drive shaft, seal kit.
A mining company extended overhaul intervals from six to twelve months after upgrading to Halies spare parts for their A4VSO71 pump.
Looking for Rexroth A4VSO spare parts or other hydraulic pump components?
Halies Hydraulic is a professional manufacturer of hydraulic pumps and replacement parts with global export experience.
Contact Person: Mr. Roberto
Email: jshanlishi03@jshanlishi.com
WhatsApp: +86 139 0153 6676
WeChat: +86 139 0153 6676
Phone: +86 139 0153 6676
Get a Quote Now and we will reply within 24 hours.
The Rexroth A4VSO axial piston pump is widely used in excavators and industrial hydraulic systems. While reliable, long-term heavy-duty operation can lead to failures such as unstable pressure, noise, leakage, or overheating. This article summarizes the most common problems and spare parts solutions.
Noise and Vibration – caused by worn piston shoes or cylinder block.
Pressure Instability – valve plate wear or control piston leakage.
Internal Leakage – damaged seals or scoring in the cylinder block.
Overheating – excessive friction, oil contamination, or clogged filters.
Shaft Seal Failure – due to shaft wear or improper case drain routing.
| Failure / Symptom | Possible Root Cause | Recommended Spare Parts |
|---|---|---|
| Noise & Vibration | Worn piston shoes, cylinder block wear | Piston shoe set, Cylinder block, Swash plate |
| Pressure Instability | Valve plate wear, control piston leakage | Valve plate, Control piston kit, Spring set |
| Internal Leakage | Damaged seals, cylinder block scoring | Seal kit, Cylinder block, Drive shaft |
| Overheating | Friction, contaminated oil, clogged filter | Piston/cylinder kit, Filter element, Oil flushing |
| Shaft Seal Failure | Shaft wear, high case pressure | Drive shaft, Front oil seal, Case drain check |
Cylinder block, valve plate, piston shoe set, retainer plate, drive shaft, seal kit.
A mining company extended overhaul intervals from six to twelve months after upgrading to Halies spare parts for their A4VSO71 pump.
Looking for Rexroth A4VSO spare parts or other hydraulic pump components?
Halies Hydraulic is a professional manufacturer of hydraulic pumps and replacement parts with global export experience.
Contact Person: Mr. Roberto
Email: jshanlishi03@jshanlishi.com
WhatsApp: +86 139 0153 6676
WeChat: +86 139 0153 6676
Phone: +86 139 0153 6676
Get a Quote Now and we will reply within 24 hours.
