The crew can mill the first cut in the traditional up-cut mode, crab sideways and mill in the reverse direction in the down-cut mode, rather than turn around or deadhead back to the start. To make the machine even more versatile, an asphalt emulsion package consisting of pumps and meters can be added for cold-in-place recycling work.
Seek manufacturer's help
It's important to note that no tools or machines should ever be used for a purpose they were not intended. You should never modify equipment without the help of the manufacturer. You'll likely void any warranties or service contracts you may have, and an unsafe situation may be created which can jeopardize the crew.
The manufacturer will be able to design modifications in a safe and effective way, and can deliver your machine with them in place.
Roadtec's Vice President of Engineering Dave Swearingen says, "We work with customers on special applications. If there is a way, we'll make it work."
Swearingen's staff has provided solutions from outrigger wheels on mills that work on sloped surfaces such as racetracks to special systems on pavers to keep material and fuel flowing while working on slopes. Another modification Roadtec has successfully provided in the United States and internationally is outfitting the RX-900 cold planer with a reverse gearbox, allowing the milling machine to pull as well as push other equipment as part of recycling train.
The reverse-gearbox RX-900 up-cuts and rear-loads while pushing a cement slurry tanker and pulling a screening/crushing/mixing train plus an asphalt tanker. A recirculating JCI single deck screen (3/4-inch passing) and impact crusher sizes the material, which is then weighed and mixed with asphalt emulsion. Then the train lays down a windrow for a Carlson pick-up machine to feed the paver.
In the case of Lindsey's RX-900 cold planer, modifications were not even required to use the machine as a pulverizer. At top cutting speeds of 125 fpm, it took an average of approximately one hour per pass to cut the 1.5 miles. No water was used. Cutter teeth looked nearly new when the job was completed. In Leber's words, "the contractor was very pleased."