Introduction
Use this guide to adjust the chain tension on a Barreto Trencher E718MTH4S 2016.
Position the trencher on a flat surface and turn the engine and power off before starting any work.
Tools
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Make sure that both ignition switches are turned to the off position. There is one on the engine and one on the control panel.
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Pull the ring near one of the wheel hubs straight out, away from the wheel.
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Rotate it so that the small roll pin lines up with its slot.
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Release the ring so that the lock pin slides into the wheel. You may need to rotate the wheels a little before the lock pin fully engages.
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Repeat this step so that the lock pins on both wheels are engaged.
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Make sure the boom is in a horizontal position.
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Use a 3/4 inch open-end wrench to loosen the adjuster screw locknut so that you have enough space to tighten the adjuster screw as needed.
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Use a 1/2 inch open-end wrench to tighten or loosen the adjuster screw.
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Adjust the screw until there is about a 1 inch gap (3.8 cm, or about two fingers wide) between the bottom of the boom and the lowest part of the top of the chain.
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After the chain is properly tensioned, use a 3/4 inch open-end wrench to tighten the adjuster screw locknut.
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Why 10311 for the chain roller assembly? It doesn't include the bearings. Part number 00265 includes the bearings.
JAMES -
It's also important to ensure that the boom cushion washer is still between the tension bolt and the boom cushion. Mine was missing and the tension bolt was screwed all of the way in, which took it halfway through the boom cushion, which resulted in a chain that was too loose.
JAMES -