Hydraulic Control Valve Problems

When working on a specific machine refer to a machine s technical manual for more information.

Hydraulic control valve problems.

Load drops with control valve in neutral. One of our members wrote to me regarding the following problem. Replace old filter with new filter insert. The parts of the directional solenoid valve that are prone to failure as follow conditions.

1 make sure the hydraulic hoses are not connected. Listed below are areas that you can diagnose in hydraulic valves. Leaking cylinder seals or fittings. The push rod in the solenoid tube wear becomes shorter.

Check circulation filter pump for problems. Check water thermostat operation. Check for spool binding. If required correct the setting.

The following lists information when troubleshooting relief pressure reducing pressure sequence and unloading valves. Hydraulic solenoid valve is also called an electromagnetic directional control valve that has a loss during regular operation and the damage will reach a certain level which will cause the solenoid valve to malfunction and cannot work. Check that none of the pressure relief valves were set too low. In addition to the control valve there are other variables that influence the flow rate including temperature pump output and other factors.

Tie bolts too tight stack valves. Control valve does not center binding see hydraulic product safety sheet. We have a hydraulic system that operates two cylinders. Design considerations for hydraulic flow control valves.

2 start the unit with the oil cold 3 activate the hydraulics by engaging the hydraulic control valve. Hydraulic directional control valve tractor loader 1 joystick 2 spool 11gpm usa 98 00. In a hydraulic circuit actuators are controlled by the flow control valve. Make offer 1 spool hydraulic control valve double acting 13 gpm 3600 psi sae ports new.

The tank valves and cylinders were cleaned and a replacement pump installed. Control valve not centering when released. Hydraulic unit temperature high. Directional valves route the flow of fluid into ports a and b based on the application.

Hydraulic system troubleshooting guide follow these steps to make an initial diagnosis of what may be causing a low or no pressure situation with a hydra tech hydraulic power unit system. In this how to repair video we ll be discussing several topics inclu. Check cooling pump operation.