Your incoming material changes throughout the year, and so does the end product that your customers desire. Vermeer trommel screens can be equipped with our tension screen design where the screens are clamped on per section, making them more convenient to remove and replace.
Instead of changing out the entire drum, you only have to switch the screen panels. With the ability to tension the screen around the drum, you can add rigidity to the screens. This design allows the use of smaller-gauge wire, ultimately increasing the open area of the screen to help improve productivity.
The result is a quick process that can help you improve jobsite efficiency. Side panels allow the full length of the drum screen to be exposed, which makes it convenient to access and maintain the screens. Five large bolts adjust a tensioning hook that allows you to change screen sizes efficiently.
The following step-by-step process will guide you through replacing the screens in Vermeer TR6400 and TR6450 trommel screens. Refer to your machine’s operator’s and/or maintenance manual for safety messages and further instructions.
Step 1: position the screens
The first step is to position the trommel drum so the screen clamps are accessible.
To begin, start the engine and bring the engine speed to idle. Slide the hopper out of the drum. Next, you will want to unlatch the drum door. If the optional fines conveyor is installed on the left side of the trommel, you will want to make sure it is low enough to clear the door prior to opening. The door is opened by using the key on the control panel. Make sure it is fully opened.
Rotate the drum using the jog controls until the screen clamps are accessible. Then the trommel should be shut down using the proper shutdown procedures listed in the operator’s manual. Remove and retain the key and press the engine disable switch.
Step 2: remove the screens
With the machine shut down and the engine disabled, you can now loosen the bolts for the screen panel you plan to remove. Once you have loosened the bolts, you can pull the engine disable switch.
Now start the engine using the proper starting procedure. Two workers should pull the screen panel hook off the lift bar and pull the screen away from the drum. A third worker should push the appropriate drum jog button to rotate the drum as the other two workers guide the panel off the drum.
Set the screen that was just removed on the ground out of the way.
Step 3: Replace the screens
Have two workers position the new screen panel into place and hook it onto the clamps on the lift bar. A third worker should activate the appropriate drum jog button to pull the screen panel onto the drum while the other two workers guide it until the screen panel hook can be hooked to the drum.
Next, follow the shutdown procedures to properly shut down the machine. Remove and retain the engine key, then press the engine disable switch.
With the machine shut down and the engine disabled, you may tighten the cmap bolts inside the drum while outside workers hold the screen panel against the drum.
Now that the new screen panel is installed, exit the drum and pull the engine disable switch.
Repeat this process until all the panels are replaced.
That’s all there is to it. Change screens with greater efficiency.
If you want to learn more about how your operations can benefit from using a trommel screen, check out the following helpful articles:
- Sizing a trommel screen: How to choose the right machine for your operation?
- Tension screen drum versus auger drum: Which trommel screen is right for your operation?
- Four machine-setting tips to adjust the efficiency of your trommel screen.
Your local Vermeer dealer is also a great resource. Contact them today.
Vermeer Corporation reserves the right to make changes in product engineering, design and specifications; add improvements; or discontinue manufacturing or distribution at any time without notice or obligation. Equipment shown is for illustrative purposes only and may display optional accessories or components specific to their global region. Please contact your local Vermeer dealer for more information on machine specifications.
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