Training Guide Hydraulics Material Pump Testing

Test the DIN plug for power the light should be on and the 12 volts at the posts.

Connect the RTD bypass tool to the material Pak Stat and the hose Pak Stat.

This will allow you to turn on the Hydraulics with the machine not to full temp.

First turn "OFF" the diesel engine.

Then remove one of the two hydraulic hoses going to the material hydraulic motor.

Connect the “T” connector with the 3,000 PSI gauge to both sides of the motor fitting. Depending on the connection size, you may need to connect to the back of the flow control and make sure it is fully open.

Start the diesel engine, turn "ON" the main power in the control box, pull the trigger of the wand, and then toggle the switch to the "Reverse" position, and read the pressure gauge.

Remember the machine needs to be cold to set the pressure correctly.

If the pressure needs to be adjusted, use the pressure relief valve labeled "RVP", loosen the jam nut, and change the pressure with the Allen screw at the end of the relief.

Turn clockwise to increase pressure and counterclockwise to decrease pressure and then tighten the jam nut to lock the pressure.

¼ turn equals about 200 PSI of pressure.

The flow rate varies for each machine; you will need to look up the correct flow of the machine you are working on.

If the Pump Pressure does not change, you must replace the relief valves or check that the Flow control knob is working; you may need to replace the flow control cartridge.

Replace and test again

Turn "OFF" the diesel engine and replace the relief valve.

If it works, then remove the testing tools.