DIGGING CHAIN DURABILITY
Tests have shown that digging chains last between 50 to 500 running metres of trenches. Under normal conditions, an average of about 300 metres can ve achieved. The chain longevity depends on five main factors:
The deeper you dig, the quicker the chain wears.
The correct engine speed for the soil type can increase productivity and reduce wear. An experienced operator will work with an optimal speed for the ground condition. By doubling the engine speed, the chain wear increases four fold, so the less speed the longer the chain will last. When ground condition permits, only run the engine to ½ or ¾ of the maximum speed for optimal results.
The more abrasive the soil, the faster the chain will wear off. This wear factor can be reduced by varying the speed of the trencher and with chain tension adjustments as described in the Operator’s and Safety Manual.
There is a learning curve using the GeoRipper®. A combination of understanding the soil type, depth and chain speed can significantly increase the longevity of the digging chain. A lack of this understanding can greatly reduce it.
Chain Direction and Maintenance
The digging bar is reversible but the chain is not! Chains are directional: when the chain is installed backwards, the efficiency of the chain is greatly reduced and it will wear prematurely.
Each unit comes with a box of two chains. The first chain allows the operator to learn about the machine and the ground. As the operator becomes more accustomed, the second chain should last longer than the first chain, but it is not guaranteed.
Clean the chain after use with a wire brush and oil it with WD40 or similar. For longer storage period, remove the chain and soak in light oil.
DURABILITY OF THE DIGGING BAR
The complete digging bar consists of the bar together with the nose sprocket and its bearing and the nose end plates.
The nose end plates and the sprocket have a life expectancy of about six to eight digging chains. Rocky soil, hard clay and gravel can significantly reduce life expectancy.
The lifetime of the sprocket bearing depends on the type and humidity of the material in which the GeoRipper® is used. Sandy and other fine, abrasive soils can significantly reduce its life expectancy. Check regularly that the nose sprocket rotates freely, if not replace the bearing. This is estimated a every three to four digging chains interval. Each GeoRipper® is supplied with a spare bearing in the tool kit.
The digging bar can be reversed when worn at approximately every four digging chains interval. When both sides are worn, replace the digging bar.
The replacement intervals are given for information only and are a rough estimate.
All spare parts can be ordered in the online shop at georipper.de