Tech Tips

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High Country Valve Driver Card Setup Video Tutorial*

Take a look at this video tutorial which shows the procedure to set up the minimum and maximum values on a 4-20ma High Country Valve Driver Card on a Schwing Bioset Piston Pump Hydraulic Power Pack. After the Valve Driver Card is set up, PLC Values should correlate to the minimum and maximum speed references.

NOTE: This procedure is only to be used if you get a Valve Driver Card that has not already been set up by Schwing Bioset, Inc.

For questions on this procedure or other service questions, please contact Paul Katka at (715) 247-3433.

Be sure to take a look at Schwing Bioset’s other Tech Tips and our Recent News and Blog.

Checking Hydraulic Pressures*

Check out this Schwing Bioset Tech Tips video on checking Hydraulic Pressures on your equipment.

Poppet Replacement of a Positive Displacement Pump*

Take a look at this video on the poppet replacement of a positive displacement pump.

Ram Replacement of a Positive Displacement Pump*

Material pistons must be changed when they allow too much material to leak into the waterbox.
Follow our step-by-step video for proper ram replacement.*

Pump Troubleshooting Guidelines

1. If a pump gets to the end of the stroke and pressures out, it’s most likely that a switching valve is bad.

2. If a pump is machine gunning, check the check valves on the control block.

3. If a pump has high pipeline pressure, verify the lube pump is turned on and working properly.

4. If a pump is slamming hard at the end of the stroke, check the setting on the throttle valves on the control block or verify that material is present.

5. If there is excessive heat noted anywhere on the pump unit, most likely there is a bad component in that area.

Basic Start-Up Failures

Hydraulic power unit will not start

Verify that the control power light on the main panel is on. If not, check the estop circuit.

Pump will not go into load

First, make sure to close the “A-Line” on the Power Pack. Place the pump into load and check to see if it builds up to system pressure (pressure should reach the level reflected in the Hydraulic Schematic Prints).

If the pressure does not develop, verify there is power to the Load/Bypass coil. This is done by checking the LED light on the angle plug of the Load/Bypass Valve located on the power unit. The LED light should be lit “ON”. If there is no power (Angle Plug Light – OFF), check the Fuse and the Output Module in the electrical panel to verify that the Pump Load Solenoid Output is “ON”.

If there is power to the Load/Bypass Valve (Angle Plug Light – “ON”), but the pressure does not come up to the system pressure shown in the Hydraulic Schematic prints, check the manual override function of this block by pressing the Manual Override button. If it is possible to build up pressure with the Manual Override button engaged, the Coil on the Load/Bypass Valve needs to be replaced.

If there is pressure with the A-Line Valve closed and the pump will not stroke, open the A-Line Valve and make sure there is power to the FWD Solenoid on the control block of the pump by confirming the LED light is lit. If there is no power (Angle Plug Light – OFF), check the Fuse and Output Module to the Forward Coil in the Electrical Panel to verify they are “ON”. If there is power (Angle Plug Light – “ON”), manually override the coil by pushing the Manual Override button. If the pump starts pumping with the Manual Override button engaged, the Forward Coil needs to be replaced.

Note: Older models may not have an Angle Plug with a Light. For these units, please verify there is power at the Angle Plug.

Oil Contamination + Prep

FACT: Rubber gloves or rags do not make good caps and plugs!

Schwing Bioset sells a cap and plug/test kit to help keep your hydraulic system clean when performing maintenance. The hydraulic gauges included in this kit also allow for easy over the phone troubleshooting with Schwing Bioset service techs.

Just because you drain and change the oil in your hydraulic tank does not mean the tank is clean. Most hydraulic tanks have never been cleaned since installed; please verify the cleanliness of the inside of the tank. If rust is present it must be removed. Oil corrosion inhibitor must be added with new oil.

Call today for quotes on the troubleshooting kit we offer. We also have corrosion inhibitor in stock!

Order Your Hydraulic Test Kit Today!

Hydraulic Test Kit

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The Importance of Filtration

Schwing Bioset recommends changing your oil filters either annually, or after 2,000 hours of operation, whichever comes first.

More than 70-percent of component failures are caused by contaminants in the hydraulic system. Protect your equipment by replacing your hydraulic filters with Genuine Schwing Bioset OEM filters every 2000 working hours or once a year.

A proper maintenance schedule along with changing your filter at the proper intervals will increase oil cleanliness and increase your equipment’s up-time and reliability. Don’t take chances, hydraulic oil is the lifeblood of your equipment.

Order Your Filter Today!

Filter Form

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