SAIVS
  • HOME
  • ABOUT US
    • Honor
    • Manufacturing Capacity
    • Privacy Policy
    • Terms of Service
  • PRODUCTS
    • Hydraulic Pumps
      • Rexroth
        • A2F Series
        • A4 F/V Series
        • A7VO Series
        • A8VO Series
        • A10V Series
        • A11V Series
        • PG Series
        • AZ Series
        • PV Series
      • Parker
        • PV-plus Series
        • P1 PD Series
        • PAVC Series
        • VP1 Series
        • PG Series
        • P2 P3 Series
      • Sauer-Danfoss
        • 45 Series
        • 90 Series
      • Eaton Vickers
        • PVM Series
        • PVH Series
        • PVQ Series
        • PVE Series
        • VMQ Series
      • Nachi
        • PVD Series
        • PVK Series
        • PVS Series
        • PZS Series
        • PZ Series
      • Hawe
        • V30 Series
        • V60N Series
      • Kawasaki
        • K3V Series
        • K5V Series
      • Sumitomo
        • QT Series
      • Linde
        • MPR Series
        • HPV-02 Series
        • HPR-02 Series
      • Vane Pumps
      • Gear Pumps
    • Hydraulic Motors
      • SAI GM Series Motor
      • Intermot Piston Motor
      • Hydraulic Cycloidal Motors
      • Rexroth Hydraulic Motor
      • Poclain Hydraulic Motor
    • Hydraulic Valves
      • Pressure Relay
      • Pressure Valve
      • Threaded Cartridge Valve
      • Flow Valve
      • Anti-explosion Valve
      • Proportional servo valve
      • Direction Valve
      • Directional Control Valves
    • Planetary Gearboxes
      • Rexroth
      • Bonfiglioli
      • Brevini
      • Dinamicoil
      • O&K
    • Hydraulic Cylinder
      • Aerial Work Platforms
      • Agricultural Equipment
      • Construction Equipment
      • Manufacturing Equipment
      • Marine
      • Material Handling
      • Mining
      • Road Service
      • Waste/Recycling
      • Cylinder Parts
    • Hydraulic Power Units
      • Scissor High Altitude Platform
      • Pallet Car
      • The Wing Car
      • Lift Platform
      • Automobile Tail Plate
      • Special Vehicle
    • Hydraulic Pump Parts
      • Parker Series
      • Komatsu Excavator Series
      • Hitachi Series
      • Rexroth Series
      • Sauer Danfoss Series
      • Uchida Series
      • Messori Series
      • Kayaba Series
      • Toshiba Series
      • Nachi Series
      • Eaton Vickers Series
      • Linde Series
      • Caterpillar Series
      • Kawasaki Series
      • Kobelco/Kato Series
      • Hawe Series
      • Sumitomo Series
    • Hydraulic Tools
      • Flange Tools
      • Hydraulic Lifting tools
        • Hydraulic pump
        • Hydraulic Cylinder/Jack
        • Hydraulic Professional Tools
      • Bolting Tools
        • Hydraulic Tensioners
        • Hydraulic pump
        • Torque wrenches
      • Hydraulic Components
    • Hydraulic System
    • Hydraulic Manifolds
    • Hydraulic Winch
  • APPLICATIONS
    • MOBILE
    • AGRICULTURE
    • INDUSTRIAL
    • ENERGY
    • FOOD & BEVERAGE
    • OIL & GAS
  • DOWNLOAD
  • CONTACT US
  • BLOG
HOME > BLOG

Common fault causes and treatment methods of gear pump

Author:SAIVS Time:2022-10-14 Click:

Common fault causes and treatment methods of gear pump:

dab60044cc67001813a860b5aca37d8f(1).jpg


1. Reasons for insufficient pump flow:

Suction or discharge valves closed;

Low inlet pressure;

Outlet pipeline is blocked;

Packing box leakage;

Low speed.

Processing methods:

Confirm whether the valve is closed;

Check whether the valve is open or not;

Confirm whether the discharge is normal;

Fastening; When a large number of leaks affect production, stop running and disassemble and inspect;

Check actual pump shaft speed.

2. Reasons for insufficient pressure:

The radial and axial clearances of gear pump are too large, and the end clearance has more influence.

There are cracks or leaks in the teeth.

Oil viscosity is too high or oil temperature is too high.

Motor power does not match gear pump.

The oil filter is blocked.

Pressure adjustment of relief valve is too low or malfunctioning.

Processing methods:

Replace the pump body.

If leakage occurs, paper cushion is added between pump body and pump cover to fasten the connection piece. If there is crack in pump body, the pump body should be replaced.

Oil No. 20 is suitable for working at temperatures between 10 and 50 degrees. If the temperature is too high, a cooling device should be installed.

Select a matching motor.

Clean oil filter.

Re-adjust pressure or replace relief valve.

3. Reasons for oil leakage:

The pump cover and sealing ring fit too loosely.

Oil seal frame spring is off.

The sealing surface of the shaft is scratched.

Processing methods:

Adjust the gap between pump cover and sealing ring.

Replace seals.

Re-grind the sealing surface.

4. Abnormal operation of oil pump or causes of biting:

The axial and radial clearances of the pump body are too small.

Needle rollers do not turn flexibly.

The concentricity of cover plate and shaft is not enough.

Pressure Valve malfunction.

The pump and motor coupling are not concentric enough.

There is impurity in the pump.

Processing methods:

Adjust axial or radial clearance.

Replace the movable needle-roller bearing.

Replace the cover plate so that it is concentric with the shaft.

Replace the spring to remove dirt from the valve body orifices or to change the spool valve.

Adjust the concentricity of pump shaft and motor coupling so that it does not exceed 0.01mm.

Filter oil with fine silk screen to remove dirt.

PGP2/3-2X3X  series Rexroth Gear Pumps

PGP2/3-2X3X series Rexroth Gear Pumps

5. Reasons for sudden stop of pump:

Power failure;

Motor overload protection;

Damage to coupling;

High outlet pressure, interlock reaction;

Abnormal biting in pump;

The shaft stuck to the bearing.

Processing methods:

Check power supply;

Check motor;

Open the safety shield and check by turning.

Check instrument interlocking system;

After parking, confirm the positive and negative turning wheel;

Locomotive confirmation.

Tag: gear pump

Random Recommend

  • Selection of hydraulic solenoid change-over valve
  • Hydraulic cylinder manufacturing
  • Customizable Hydraulic Power Units for Your Operations
  • What is the process of removing hydraulic motor system anomalies?
  • How to choose an electrohydraulic jack
  • The Benefits of Using a Battery-Powered Brushless Torque Wrench
  • maintenance and routine maintenance of hydraulic motor in hydraulic system
  • What are the advantages of a hydraulic jack?
  • How to ensure the excellent sealing performance of the oil cylinder
  • Brief Talk about the Cause of Cylinder Burst of Hydraulic Jack

Related Products

Explosion isolation solenoid relief valve

Explosion isolation solenoid relief valve

M5X130(CAT320C)/M5X180 Kawasaki Hydraulic Pump Parts

M5X130(CAT320C)/M5X180 Kawasaki Hydraulic Pump Parts

Rexroth Servo selonoid valve 4WRLE10/16/25/35 Series

Rexroth Servo selonoid valve 4WRLE10/16/25/35 Series

SPHF / SPHP Series Synchronous Lifting System , Heavy Lifting Solution

SPHF / SPHP Series Synchronous Lifting System , Heavy Lifting Solution

AZPS series Rexroth Gear Pumps

AZPS series Rexroth Gear Pumps

Threaded Forged & Machined Head bush

Threaded Forged & Machined Head bush

LZV30/120/LVWO60 Kawasaki Hydraulic Pump Parts

LZV30/120/LVWO60 Kawasaki Hydraulic Pump Parts

KOMATSU-PC320

KOMATSU-PC320

Double Acting Cylinder 100mm Bore Rams

Double Acting Cylinder 100mm Bore Rams

Nachi Hydraulic Variable High Pressure Piston Pumps PVS Series

Nachi Hydraulic Variable High Pressure Piston Pumps PVS Series

  • ABOUT US

    • Honor
    • Manufacturing Capacity
    • Privacy Policy
    • Terms of Service
  • PRODUCTS

    • Hydraulic Pumps
    • Hydraulic Motors
    • Hydraulic Valves
    • Planetary Gearboxes
    • Hydraulic Cylinder
    • Hydraulic Power Units
    • Hydraulic Pump Parts
    • Hydraulic Tools
    • Hydraulic System
    • Hydraulic Manifolds
    • Hydraulic Winch
  • APPLICATIONS

    • MOBILE
    • AGRICULTURE
    • INDUSTRIAL
    • ENERGY
    • FOOD & BEVERAGE
    • OIL & GAS
  • CONTACT US

    NO. 626 Yuncai Road, Yunlong Town, Yinzhou, Ningbo, Zhejiang, China.

    0086-574-88180077

    seo1@saivs.com

    Saivs industrial twitter youtube linkedin pinterest
Copyright © 2012-2022 Ningbo Saivs Machinery Co.,ltd. 
SiteMap