John Deere 844J Wheel Loader
- Published: Friday, 02 February 2007 10:20
The John Deere 844J Wheel Loader is a 7-yard loader powered by an electronically controlled, 12.5-liter JPowerTech diesel engine. The engine features wet-sleeve cylinder liners for exceptional engine cooling. The exclusive Quad-Cool system has proportional fan drive. The system features a large area of pre-screening air inlets and large fin spacing for coolers so debris passes through. Quad-Cool also has an optional reversing fan to further enhance cleanout and cooling performance. The Deere Powershift transmission has smart shift technology. By continuously sensing speeds and loads, and adjusting clutch pressures accordingly, the transmission shifts without delay. The 844J has heavy-duty outboard planetary axles with open differential (standard) and limited slip (option) available. The braking system is comprised of outboard wet multi-disc brakes that self-adjust for wear. The sealed, wet-disc park brake is spring applied and hydraulically released.
The work station has a solid-state electrical distribution system that features a sealed-switch module for the operator interface. Boom kick-out and return-to-carry are electronically adjusted from the sealed-switch module in the cab. The dash is fully programmable to allow the operator to view operating information, customize machine functions to the application, and display diagnostic codes. The 844J features excavator-style hydraulics for crisp, responsive power. The fingertip controls are comfortable and easy to use, and an optional steering system is available that includes an electronic joystick with FNR controls in the left armrest. Standard ride-control has hydraulic cushioning that reduces rocking and softens the impact of sudden stops. John Deere