Energy‑Saving Performance
Automatic displacement adjustment reduces energy and hydraulic oil waste while keeping the whole hydraulic system stable in operation.
APV-PVP-76
APV-PVP Series Axial Piston Variable Pumps
Size NG
76
Displacement
76 cm³/rev
Speed
1800 rpm
Flow
136.8 L/min
Nominal pressure
248 bar
Max. Pressure
310 bar
Weight (approx.)
41 kg
Products and performance
The APV-PVP-76 variable displacement axial piston pump features an NG76 mounting interface and a displacement of 76 cm³/rev, delivering a steady flow rate of 136.8 L/min at a rated speed of 1800 rpm. With a rated pressure of 248 bar and a peak pressure of up to 310 bar, it is ideally suited for demanding, heavy-duty applications.
Utilizing proven variable displacement technology, the pump automatically adjusts its displacement based on real-time load requirements. This capability effectively reduces energy consumption and hydraulic fluid waste while maintaining stable system operation, thereby significantly enhancing overall efficiency. Its advanced control system enables precise hydraulic regulation, optimizing the positioning accuracy and operational stability of the host equipment.
Designed for high reliability and versatility, the pump maintains consistent performance even in harsh industrial environments. It is widely used in closed-loop systems across sectors such as metal forging and pressing, metallurgy, general engineering, mining, and marine machinery. Delivering energy-efficient, high-performance, and long-term reliable hydraulic power, the APV-PVP-76 serves as an ideal core power component for high-pressure, heavy-duty industrial hydraulic systems.
Utilizing proven variable displacement technology, the pump automatically adjusts its displacement based on real-time load requirements. This capability effectively reduces energy consumption and hydraulic fluid waste while maintaining stable system operation, thereby significantly enhancing overall efficiency. Its advanced control system enables precise hydraulic regulation, optimizing the positioning accuracy and operational stability of the host equipment.
Designed for high reliability and versatility, the pump maintains consistent performance even in harsh industrial environments. It is widely used in closed-loop systems across sectors such as metal forging and pressing, metallurgy, general engineering, mining, and marine machinery. Delivering energy-efficient, high-performance, and long-term reliable hydraulic power, the APV-PVP-76 serves as an ideal core power component for high-pressure, heavy-duty industrial hydraulic systems.
Specifications
APV-PVP-76 General Information
Medium NG76 size balances displacement and footprint, suited for medium-heavy duty industrial hydraulic units.
76 cm³/rev nominal displacement delivers high flow power for continuous medium-heavy load operations.
Compatible with standard 1800 rpm motor speed for smooth operation, low vibration and noise.
Rated flow 136.8 L/min provides sufficient rapid oil supply for synchronous multi-actuator operation.
248 bar high nominal pressure supports continuous stable load for various heavy-duty medium-high pressure systems.
Max pressure 310 bar features strong short-term shock overload resistance to protect the complete hydraulic system.
Approx. 41 kg compact robust structure, easy for mounting and compatible with various heavy machinery.
Widely applied in forging, metallurgy, mining, marine machinery with broad working condition adaptability.
Product Features of APV-PVP Series Variable‑Displacement Axial Piston Pumps
Suitable for single and multiple pump configurations;
Swashplate design for open-circuit applications;
Metric mounting configuration;
High-strength cast steel pump housing;
High safety and low noise levels;
Side ports with SAE flange connections;
Various control options;
Through-drive capability for all configurations;
Shaft end options include SAE splines, as well as SAE or metric parallel keys;
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
140cm³/rev
Speed
1800 rpm
Flow
252 L/min
Weight (approx.)
82 kg
Nominal pressure
248 bar
100cm³/rev
Speed
1800 rpm
Flow
180 L/min
Weight (approx.)
82 kg
Nominal pressure
248 bar
76cm³/rev
Speed
1800 rpm
Flow
136.8 L/min
Weight (approx.)
41 kg
Nominal pressure
248 bar
60cm³/rev
Speed
1800 rpm
Flow
108 L/min
Weight (approx.)
41 kg
Nominal pressure
248 bar
48cm³/rev
Speed
1800 rpm
Flow
86.4 L/min
Weight (approx.)
25 kg
Nominal pressure
248 bar
41cm³/rev
Speed
1800 rpm
Flow
73.8 L/min
Weight (approx.)
25 kg
Nominal pressure
248 bar
33cm³/rev
Speed
1800 rpm
Flow
59.4 L/min
Weight (approx.)
20.4 kg
Nominal pressure
248 bar
23cm³/rev
Speed
1800 rpm
Flow
41.4 L/min
Weight (approx.)
20.4 kg
Nominal pressure
248 bar
16cm³/rev
Speed
1800 rpm
Flow
28.8 L/min
Weight (approx.)
13.2 kg
Nominal pressure
248 bar
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6 Inline
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Fuel System
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