Energy‑Saving Performance
Automatic displacement adjustment reduces energy and hydraulic oil waste while keeping the whole hydraulic system stable in operation.
APV-PVH-57.4
APV-PVH Series Axial Piston Variable Pumps
Size NG
57
Displacement
57.4 cm³/rev
Speed
1800 rpm
Flow
98 L/min
Nominal pressure
250 bar
Max. Pressure
300 bar
Weight (approx.)
31 kg
Products and performance
The APV-PVH-57.4 variable axial piston pump is a high-performance hydraulic power unit designed for heavy-duty industrial scenarios. Adopting NG57 standard mounting size, it features a57.4 cm³/rev displacement, stably outputs 98 L/min flow at a rated speed of 1800 rpm, and supports a 250 bar nominal pressure, delivering powerful and steady hydraulic power for high-load equipment operation.
Equipped with advanced automatic variable displacement technology, this pump intelligently adjusts oil output according to actual working conditions. It effectively reduces energy consumption and hydraulic oil waste while maintaining excellent system stability, greatly improving overall operational efficiency. The precise hydraulic control technology optimizes equipment running accuracy and operational stability, avoiding unstable operation caused by load changes.
Boasting superior durability and environmental adaptability, the pump maintains stable and reliable performance in harsh industrial working environments. It is widely applicable to steel mills, rolling mills, heating furnaces, as well as earthmoving machinery, construction machinery, machine tools and plastic machinery. Integrating energy saving, high efficiency and high precision, it serves as a reliable and cost-effective core hydraulic component for diverse heavy industrial hydraulic systems.
Equipped with advanced automatic variable displacement technology, this pump intelligently adjusts oil output according to actual working conditions. It effectively reduces energy consumption and hydraulic oil waste while maintaining excellent system stability, greatly improving overall operational efficiency. The precise hydraulic control technology optimizes equipment running accuracy and operational stability, avoiding unstable operation caused by load changes.
Boasting superior durability and environmental adaptability, the pump maintains stable and reliable performance in harsh industrial working environments. It is widely applicable to steel mills, rolling mills, heating furnaces, as well as earthmoving machinery, construction machinery, machine tools and plastic machinery. Integrating energy saving, high efficiency and high precision, it serves as a reliable and cost-effective core hydraulic component for diverse heavy industrial hydraulic systems.
Specifications
APV-PVH-57.4 General Information
The compact NG57 frame utilizes the PVH flexible design, supporting multiple configurations and diverse operating conditions to deliver optimal cost-effectiveness.
With a displacement of 57.4 cm³/rev and a volumetric efficiency exceeding 95%, more input power is converted into effective flow, reducing heat generation and energy consumption.
Operates stably at 1,800 rpm; heavy-duty bearings minimize internal deformation and wear, extending service life and ensuring reliable uptime.
The 98 L/min flow rate is matched to high-power equipment; paired with a high-efficiency compensator, it enables precise system control and delivers higher overall efficiency.
Rated for 250 bar and featuring proven heavy-duty components, it ensures stable, continuous high-pressure operation under demanding conditions.
Compatible with load-sensing systems and featuring a maximum working pressure of 300 bar, it meets the demands for long-term, high-performance operation of high-power equipment.
The lightweight structure, weighing approximately 31 kg, reduces the overall load and facilitates on-site installation, inspection, and routine maintenance.
Its low-noise structure is suited for workshops with stringent noise-reduction requirements, while its versatile design finds broad application across numerous industries—including steel mills, rolling mills, heating furnaces, earthmoving and construction machinery, machine tools, and plastics machinery.
Product Features of APV-PVH Series Variable‑Displacement Axial Piston Pumps
The PVH series comprises high-flow, high-performance variable-displacement axial piston pumps that incorporate proven design features found in other piston pumps. They offer high-quality manufacturing and performance characteristics while being compact and lightweight.
The PVH series is specifically designed to meet the performance requirements of next-generation equipment, supporting continuous operation at 250 bar (3625 psi).
These pumps are highly efficient and reliable, offering maximum application flexibility through a range of optional control methods. Specially engineered for demanding applications, they deliver the productivity gains and improved controllability required in sectors such as earthmoving, construction machinery, machine tools, plastics processing equipment, and other energy-conscious markets. Like all Vickers products, these pumps have undergone rigorous laboratory testing and field validation.
How to repair the mating pair of piston ball head and slipper inner ball socket.
- The factory assembly clearance between piston ball head and slipper ball socket is normally 0.015~0.025 mm.
- After prolonged service, the clearance enlarges. Parts can still be used if the clearance does not exceed 0.3 mm.
- Overlarge clearance will cause increased pulsation of pump outlet pressure and flow.
- In serious cases, loose slippers and slipper detachment may happen, further resulting in severe pump damage.
- Once signs of pressure and flow pulsation are detected, inspect slipper looseness in advance and conduct slipper re-clinching promptly.
How to repair the swash plate (thrust plate).
- After long-term operation, concave deformation will form on the flat surface of the swash plate.
- The workpiece can be surface-ground followed by nitriding treatment.
- If the removed material thickness (e.g. 0.2 mm) does not completely eliminate the original nitrided layer, re-nitriding may be omitted.
- Hardness inspection of the swash plate surface is mandatory in such cases.
What are the precautions for bearing replacement?
- Excessive bearing internal clearance will break the normal clearance of friction pairs and damage the oil film thickness of hydrostatic support, shortening the service life of piston pumps.
- The average service life of general bearings reaches 1000 hours (roughly more than two years). Bearings shall be replaced as appropriate after exceeding this service period.
- Replace with bearings of the identical model marked on the removed old bearing, or verified interchangeable alternatives.
- If grooves are scratched on the swash plate surface by piston ball heads (applicable to radial piston pumps), laser cladding with alloy powder is recommended for repair.
- Laser cladding ensures high bonding strength and hardness of deposited material without reducing the hardness of surrounding base metal.
- Manual overlay welding with chromium-type welding electrodes is an alternative method. The repaired swash plate surface requires re-heat treatment, preferably in a nitriding furnace.
- Regardless of the repair method adopted, the original dimensional accuracy, hardness and surface roughness of the swash plate must be restored.
Low oil Level Inclination Angle-Front Up
45 °
Low oil Level Inclination Angle-Back Up
45 °
Low oil Level Inclination Angle-Fuel Pump Side Up
45 °
Low oil Level Inclination Angle-Exhaust Side Up
45 °
Oil Sump Capacity-Upper Limit
14.2 L
Oil Sump Capacity-Lower Limit
12.4 L
Capacity of The Whole System
16.4 L
No Oil Suction / No Oil Discharge — Causes & Solutions
Main Causes and Troubleshooting Methods for Hydraulic Pump No Oil Suction / No Oil Discharge
- Damage to the hydraulic pump, pump motor, or coupling between motor and pump. Replace the faulty pump, motor or coupling in a timely manner.
- Too low oil level in the tank or excessively high pump installation position causes suction failure. Refill oil to the gauge level or adjust the pump height to keep the suction lift within the specified range.
- Oil impurities and increased viscosity block the suction filter and oil pipe. Clean pipes and filters regularly and replace with qualified hydraulic oil as required.
- Oil impurities and increased viscosity block the suction filter and oil pipe. Clean pipes and filters regularly and replace with qualified hydraulic oil as required.
Insufficient Pressure & Reduced Efficiency — Causes & Solutions
Main causes and troubleshooting methods for hydraulic pumps discharging oil but lacking pressure and exhibiting reduced efficiency.
- Severe wear of internal sliding parts leads to low volumetric efficiency and excessive axial/radial clearance. Replace the hydraulic pump or perform complete overhaul.
- Damaged oil pipes and poor suction-side sealing cause air intake. Check all connections, reseal joints or replace damaged pipelines.
- Blocked oil pipes and heavily contaminated filters. Clean pipelines and filters thoroughly to ensure full flow cleanliness.
- Incorrect variable pump adjustment and severely worn relief valve spool. Readjust flow parameters and replace worn relief valve components for stable pump operation.
- Motor speed below rated value and internal foreign impurities. Match the correct motor per specifications and clean internal impurities timely.
Severe Noise During Hydraulic Pump Operation — Causes & Solutions
Major Causes of Excessive Noise During Hydraulic Pump Operation and Methods for Troubleshooting
- Mostly caused by clogged filter, low oil level, air inhalation via oil seal and pipelines. Check tank oil level, repair pipelines, inspect pump seals, clean pipes and filters, and replace hydraulic oil periodically.
- Excessively high oil viscosity, low oil temperature and entrained air bubbles. Select suitable hydraulic oil according to seasons.
- Damaged coupling or misalignment between pump and motor leads to heavy vibration and loud noise. Inspect coupling wear, replace coupling and complete alignment strictly as installation requirements.
- Operating speed exceeds rated value and mismatched driving motor. Reduce pump speed and select a suitable motor.
- Worn shaft seal causes air intake; loose pump end cover bolts. Replace pump shaft seal and tighten cover bolts.
- Low gear precision, poor contact or damaged internal parts of gear pump. Replace or grind gears, renew damaged components.
- Insufficient axial clearance, out-of-tolerance perpendicularity or parallelism. Replace the gear pump entirely.
- Blockage inside relief valve. Clean or replace the relief valve.
- Vibration generated by unfixed pipelines. Secure all hydraulic pipelines firmly.
Hydraulic Pump Housing Oil Leakage — Causes & Solutions
Main Causes of Oil Leakage from Hydraulic Pump Bodies and Methods for Rectification
- Failure of the piston pump central spring breaks sealing between cylinder block and valve plate. Replace the spring and re-seal the mating surface.
- Damaged oil seals or worn/poorly fitted gaskets at pipeline connections. Replace all defective sealing parts.
- Severe wear of internal pump parts resulting in oversized operating clearances. Replace or refit the relevant components.
Excessive Temperature of Hydraulic Pump — Causes & Solutions
Main Causes of Hydraulic Pump Overheating and Troubleshooting Methods
- Excessively high or low oil viscosity, and accumulated impurities after long service. Replace hydraulic oil in a timely manner and adopt oil with proper viscosity.
- Heavy wear between pump side plates, shaft sleeves and gear end faces leads to overheating. Replace side plates, shaft sleeves or install a new hydraulic pump.
- Small tank volume restricts heat dissipation and triggers high oil temperature. Increase tank capacity and expand heat dissipation area.
Other Models
131.1cm³/rev
Speed
1800 rpm
Flow
223 L/min
Weight (approx.)
62 kg
Nominal pressure
250 bar
98.3cm³/rev
Speed
1800 rpm
Flow
170 L/min
Weight (approx.)
44 kg
Nominal pressure
250 bar
73.7cm³/rev
Speed
1800 rpm
Flow
125 L/min
Weight (approx.)
42 kg
Nominal pressure
250 bar
57cm³/rev
Speed
1800 rpm
Flow
98 L/min
Weight (approx.)
31 kg
Nominal pressure
250 bar
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With full ranges of emission standard from Euro 2 to Euro 7, Dongfeng Cummins producing 12 series automotive engines, started from 3.9 liter engine, to 15 liter engine, covering the power range of 125HP to 650HP.
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Power OutPut
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Max Torque
610 Nm
Displacement
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6 Inline
5.9L
Fuel System
Bosch Mechancial Pump
Emission Standard
Euro II
02. What's the Available Optional Items?
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04. Engine Parts & Recommended Wear and Tear Parts
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