This comprehensive Case 850D and 855D Crawler Dozer Loader Service Repair Manual provides detailed instructions for maintaining and servicing your equipment. The manual is packed with detailed diagrams and manufacturer specifications to guide you through every step of the process. It covers a wide range of topics, including: * **General Information:** Safety rules, service manual introduction, torque specifications, maintenance and lubrication procedures, general and detailed engine specifications. * **Engines:** Engine and radiator removal and installation, engine accessories like the air cleaner, ether injection system, muffler, turbocharger, and torque converter, engine stall tests, cylinder head and valve train, cylinder block, pistons, rods, camshaft, main bearings, oil seals, flywheel and crankshaft, lubrication system, cooling system, turbocharger, and turbocharger failure analysis. * **Fuel System:** Fuel lines, fuel tank, engine controls, fuel system and filters, Bosch fuel injection pump, drive gear, timing, and fuel filters. * **Electrical System:** Removal and installation of electrical components, electrical system specifications and troubleshooting, wiring diagrams, gauges, batteries, starter and starter solenoid, Delco-Remy alternator, and 45 amp alternators A186124 and A 187916. * **Track System:** Inspection of track system components, Case lubricated track, standard track and track frame, idler, track adjuster, recoil housing, sprocket, carrier roller, and track rollers. * **Power Train:** Transmission/torque converter diagram and troubleshooting, charging pump, transmission control valve, modulator valve, removal and installation of torque converter, torque converter, transmission, final drive, transmission controls, and drive shaft. * **Brakes:** Brake pedals, removal and installation of master cylinder, adjustment and removing air from the brake system, master cylinder, and brake. * **Hydraulics:** Hydraulic diagrams, troubleshooting and pressure checks, cleaning the hydraulic system, Rexroth hydraulic pump, Vickers hydraulic pump, equipment control valve, cylinders, backhoe control valve, removal and installation of stabilizer control valve, and stabilizer control valve. * **Mounted Equipment:** Air conditioning troubleshooting, air conditioning system, loader, blade on dozer models, ripper, ROPS cab and canopy, operator's seat and seat belt, suspension seat, backhoe, and winch. This manual is written clearly and in a way that is easy to understand, making it suitable for both experienced mechanics and DIY enthusiasts. The manual includes a wealth of information and technical details to help you perform maintenance and repairs efficiently and effectively.

The Case 850D and 855D crawler dozer loaders are powerful and versatile machines designed for a wide range of construction and earthmoving applications. These machines are known for their robust build, reliable performance, and operator comfort. The 850D is equipped with a Cummins QSL9 engine, delivering 275 horsepower, while the 855D features a Cummins QSL11 engine producing 350 horsepower. Both models utilize a hydrostatic transmission system, offering smooth and responsive control, making them ideal for precise maneuvering and heavy-duty tasks. Their crawler tracks provide superior traction and stability, allowing them to operate effectively on uneven terrain and challenging job sites. The Case 850D and 855D dozer loaders are equipped with a variety of features designed to enhance productivity and operator efficiency. The spacious cab offers excellent visibility, ergonomic controls, and a comfortable climate-controlled environment. Advanced hydraulic systems provide ample power to the dozer blade and loader arms, enabling efficient grading, material handling, and excavation. Their versatility is further enhanced by the ability to equip them with a range of attachments, including rippers, winches, and various buckets, expanding their capabilities to tackle a diverse range of projects. The 850D and 855D models are renowned for their durability and dependability, making them a trusted choice among contractors and operators who demand reliable performance and long-lasting machines.