Fuel Injection Pump 326-4634 10R-7661

In the process of use, the fuel injection pump will inevitably appear a variety of faults, this post will take the fuel injection pump 326-4634 10R-7661 as an example, to introduce you to the fuel injection pump when the fuel injection pressure is too low faults, how you should check and repair.

Low injection pressure of the fuel injection pump is a common malfunction that can lead to engine starting difficulties, lack of power, black smoke and other problems. Here are the possible causes and solutions:

1. Fuel injection pump 326-4634 10R-7661 Reasons for low injection pressure

(1) Worn plunger coupling: Excessive clearance between plunger and plunger sleeve, resulting in fuel leakage and pressure drop.

(2) Worn or damaged outlet valve: Poor sealing of the outlet valve results in fuel backflow and insufficient pressure.

(3) Fatigued or broken springs: Failure of the plunger spring or outlet valve spring to provide adequate pressure.

(4) Air in fuel system:

(5) Air enters the fuel system, affecting fuel compression and injection pressure.

(6) Clogged fuel line: Fuel filter or fuel line is partially clogged, resulting in insufficient fuel supply and pressure drop.

(7) Injector nozzle failure: the injector nozzle is worn or clogged, resulting in insufficient injection pressure.

(8) Fuel transfer pump failure: insufficient fuel supply from the fuel transfer pump, resulting in the injection pump not being able to build up sufficient pressure.

2. For different causes of failure, the following solutions can be adopted

(1) Check and replace the plunger coupling

(2) If the plunger coupling is seriously worn, replace the plunger and plunger sleeve with new ones.

(3) Repair or replace the oil outlet valve.

(4) Check the sealing of the oil outlet valve, and grind or replace the oil outlet valve if necessary.

(5) Replace the spring

(6) Check plunger spring and outlet valve spring and replace if fatigued or broken.

(7) Remove air from the fuel system

(8) Loosen bleeder screw of fuel injection pump 326-4634 10R-7661 and pump fuel with hand pump until air is exhausted.

(9) Clean or replace fuel filter

(10) Clean or replace the fuel filter periodically to ensure that the fuel line is clear.

(11) Check the fuel injector nozzle

(12) Remove the injector nozzle, check for wear or clogging, clean or replace if necessary.

(13) Overhaul the fuel pump

(14) Check the working condition of the oil transfer pump to ensure that its oil supply pressure is normal.

3. Preventive measures

(1) Use high quality fuel

(2) Avoid the use of poor quality fuel to reduce the wear and tear of impurities on the injection pump.

(3) Maintain the fuel system regularly

(4) Clean the fuel filter, fuel line and injector nozzle regularly to ensure the system is clean.

(5) Check the fuel pressure

(6) Regularly measure the static and dynamic pressure of the fuel system to ensure that the injection pump works properly.

(7) Replace worn parts in time

(8) Regularly check the plunger, outlet valve, spring and other wear parts, and replace them in time.

If the above methods fail to solve the problem of insufficient injection pressure appearing in the fuel injection pump 326-4634 10R-7661.It is recommended to contact a professional maintenance personnel for inspection and repair to avoid more serious failures due to improper operation.The official website of Keluo Construction Machinery has more professional knowledge about fuel injection pumps, welcome to browse.