This comprehensive Preventive Maintenance manual is designed for the Allison Transmission CLT 750, a component integral to heavy-duty truck operations. The manual thoroughly details procedures to ensure the safe and reliable performance of this critical transmission system. It guides users through a series of detailed steps, covering everything from the initial removal of the transmission from the vehicle to its subsequent reinstallation, ensuring a smooth and efficient process. Within its pages, you'll find instructions for draining the transmission fluid, disconnecting controls, uncoupling from the driveline and engine, removing mounting bolts, and ultimately, removing the transmission itself. The manual also offers guidance on removing input and output flanges or yokes, as well as detailed instructions for rebuilding or overhauling the transmission. Preparing the transmission for installation is meticulously addressed, with instructions covering the inspection of the flywheel (for engine-mounted models), installing the brake and output flange, installing the input flange (for remote-mounted models), installing the range selector lever, installing the PTO (where applicable), installing the shift modulation control, and installing the oil filler tube. Furthermore, the manual outlines the necessary steps for preparing the vehicle itself for transmission installation, including checking the flexplate drive assembly (for engine-mounted transmissions), inspecting input drive components (for remote-mounted transmissions), verifying the chassis and driveline, examining the oil cooler, oil filter, and lines, and ensuring the proper functioning of the controls. The manual then delves into the detailed process of installing the transmission back into the vehicle. This includes procedures for handling the transmission, mounting it to the engine (for engine-mounted models), installing transmission mounting components, supporting the CLBT 750DB rear, coupling to the engine (for remote-mounted transmissions), coupling to the driveline, connecting the cooler and oil filter lines, connecting the range selector control, connecting the hydraulic retarder control (for CLBT models), connecting the modulator control, connecting the power takeoff controls, connecting the parking brake controls, connecting the output disconnect controls (for Dropbox models only), connecting the speedometer drive, installing temperature and pressure sensors as well as electrical components, and finally, filling the oil system. Dedicated sections delve into the complexities of the transmission's oil system, offering guidance on filling the system, understanding the deep oil pan, examining oil pan interchangeability, exploring spare parts information, installing the 8 1/2-inch transmission oil pan assembly and oil filler tube, checking oil levels and using the dipstick, understanding oil specifications, performing oil changes and filter replacements, comprehending oil operating temperatures, and determining the correct oil level for the transfer gear housing (Dropbox models). The manual also addresses the nuances of dual-mode operation, explaining its general description, functional operation, and installation processes. It further delves into downshift inhibiting procedures specific to 2100 and 2300 rpm Dropbox models of the CL(B)T 750, and provides a detailed overview of the CLBT 750 dual-mode transmission with Dropbox. Additionally, there is a section dedicated to the release of the step governor valve body assembly, part number 23010297, covering its general description, interchangeability, and relevant spare parts information. The manual also includes a comprehensive section on the manual/automatic operation of the transmission on oil field equipment. Within this section, you'll find information on the Mannesmann Rexroth Corporation shifter, the Bennett shifter, preventive maintenance procedures for these shifters, and a detailed explanation of the mode shift valves employed in Mannesmann Rexroth and Bennett systems. Finally, the manual concludes with a troubleshooting section specifically focused on the CLBT 750 with dual-mode operation. This section offers guidance on identifying pressure tap locations, troubleshooting dual-mode circuitry, and addressing potential issues with the step governor valve.

The Allison Transmission CLT 750 is a robust and reliable heavy-duty truck transmission designed specifically for demanding applications. It is a part of Allison's renowned CLT Series, known for its exceptional durability, high torque capacity, and smooth shifting performance. The CLT 750 is a fully automatic transmission featuring Allison's patented "Continuous Power Technology," which ensures seamless power delivery without interruption during gear changes. Its electronically controlled system optimizes gear selection based on load, speed, and road conditions, resulting in enhanced fuel efficiency and reduced wear and tear on the transmission. The CLT 750 is also equipped with advanced features such as electronic shift control, a heavy-duty torque converter, and a durable planetary gear set, making it suitable for a wide range of applications, including refuse trucks, construction vehicles, and other heavy-duty commercial vehicles. Furthermore, the Allison Transmission CLT 750 is designed for ease of maintenance and repair. It features readily accessible components and a modular design that allows for quick and efficient servicing. This, in turn, minimizes downtime and helps ensure maximum vehicle uptime. The transmission is also built to withstand the harshest operating conditions, including extreme temperatures, heavy loads, and frequent stop-and-go driving. The CLT 750's robust construction, coupled with its advanced features and maintenance-friendly design, makes it a highly reliable and efficient solution for heavy-duty trucking operations. Its ability to handle demanding loads, optimize fuel consumption, and minimize downtime contributes to improved operational efficiency and reduced overall costs for fleet operators. With its proven track record of reliability and performance, the Allison Transmission CLT 750 continues to be a preferred choice for heavy-duty truck applications worldwide.