Landfill Arrangement Crawler Dozers (LA) are designed to handle the challenges of landfill applications. Models include the 320-hp TD-25H LA, the 225-hp TD-20H LA, and 175-hp TD-15H LA. All machines have turbocharged engines, and transmissions are three-speed countershaft powershift types. A total of six speeds forward and reverse produce the best match for each application. Each dozer has special-duty components/attachments.