How to Check Reversing Valve Solenoid?

In construction machinery, the reversing valve solenoid is a key component of the hydraulic system, used to control the operation of hydraulic valves. It is vital to regularly check the working condition of the reversing valve solenoid to ensure the normal operation of the hydraulic system. In this article, we will detail how to check the reversing valve solenoid to ensure the reliability and performance of the equipment.

 

Step 1: Preparation

Before you begin checking the reversing valve solenoid, be sure to take the following steps to ensure safe and effective operation:

 

Power off: First, make sure the construction machinery is in a power-off state to prevent electric shock or other hazards, and also to avoid affecting other diesel engine parts.

 

Hydraulic system pressure relief: Before proceeding with the work, relieve the pressure in the hydraulic system to minimize the risk of hydraulic fluid injection.

 

Personal Protective Equipment (PPE): Wear appropriate personal protective equipment, including gloves and goggles, to prevent injury.

 

Step 2: Position the solenoid

Once you have taken safety measures, the next step is to locate the directional valve solenoid.

 

Locate the solenoid: In a hydraulic system, locate the reversing valve solenoid. Usually, it is closely connected to the hydraulic valve with a wire connection nearby.

 

Step 3: Visual Inspection

Begin a cosmetic inspection of the solenoid to look for any visible damage or abnormalities.

 

Visual Inspection: Check the solenoid's housing for visible cracks, rust, or other signs of damage. Also check that the wire connections are secure and not broken or disconnected.

 

Step 4: Resistance Test

Use a multimeter to perform a resistance test to evaluate the electrical performance of the solenoid.

 

Resistance Test: Set the multimeter to resistance measurement mode and connect the wires to the terminals of the solenoid. Check that the resistance value is within the normal range according to the specifications provided by the manufacturer. If the resistance value of the solenoid is out of the specified range, it may be necessary to replace the solenoid to avoid affecting other parts of the unit such as the starter motor individual alternator and other accessories.

 

Step 5: Function Test

Perform a function test to ensure that the solenoid is working properly.

 

Functional test: reconnect the power supply, and then manipulate the hydraulic system to observe whether the solenoid can correctly control the operation of the hydraulic valve. Make sure it can open and close the valve to change the flow direction of the hydraulic system.

 

Step 6: Maintenance and Repair

If you find a problem with the solenoid, you can either maintain or repair it depending on the situation.

 

Maintenance and Repair: Similar to diesel solenoid valve, perform the necessary maintenance or repair operations according to the maintenance manual or recommendations provided by the manufacturer. This may include cleaning, lubrication, replacement of parts, or total replacement.

 

Regularly checking the reversing valve solenoid is a critical step in ensuring proper operation of your construction machinery's hydraulic system. By following these steps, you can ensure the reliability and performance of your equipment and minimize the risk of breakdowns by addressing any potential problems in a timely manner. If necessary, also refer to the manufacturer's specific guidelines and recommendations for performing maintenance and repairs.