Key Features
Unique Quad-Cool design helps keep our loaders cool in grueling conditions.
John Deere turbocharged Tier 3 diesels deliver impressive torque reserves up to 55 percent (624K/644K). For pullthrough power when the going gets tough.
Heavy-duty waste-handler buckets range from four to eight cubic yards. Third-function hydraulic valve is available for use with grapple buckets.
Optional high-lift booms increase dump height so you can move materials and push productivity to even greater heights.
Choose the axles that are right for you.Hydraulic front differential lock and conventional rear is standard; front and rear hydraulic differentials are available. Heavy-duty wide axles are standard on the 744K.
In-Cab Comfort
Standard air-ride armchair seat adjusts multiple ways for extra comfort.
Independently adjustable louvers and defrosters provide effective airflow to help keep the glass clear and pressurized cab comfortable. Activated carbon fresh-air filter reduces odors.
Choose either joystick or two-lever pilot-operated control. John Deere PowerShift™ torque-converter transmission employs Smart-Shift™ technology to ensure smooth-as-silk gear changes.
Responsive steering and full 80-degree articulation increase maneuverability in tight quarters — for fast cycles and fewer three-point turns.
Return-to-carry, boom height kick-out, and return-to-dig are set with just a touch of a button. These advantages help speed production in repetitive loading applications.
Quad-Cool system and Reversing Fan
Fan automatically reverses to help eliminate cooler-clogging buildup. Or select reversing through the monitor as required.
Quad-Cool system places the radiator, intercooler, air-conditioner condenser, and transmission and optional axle coolers in an independent package. Outside air flows through the perforated top, side panels, and coolers, and out the rear instead of drawing air through the engine compartment, for increased efficiency and durability.
Transmission oil cooler has its own air-intake screen for more efficient cooling.
Three-millimeter perforations act as a “first filter,” preventing entry of most airborne debris. Anything that gets through the side screens easily passes through the cooler cores.
No stacked cores in these waste handlers. Both sides of all coolers are easily accessible.
Hinged grill and fan swing open a full 90 degrees, further simplifying cleanout.
Uptime/Serviceability
Vertical transmission and engine oil and fuel filters allow quick and easy no-spill changes.
If something goes wrong, an advanced monitor gives easy-to-understand diagnostic messages and even offers possible solutions to minimize downtime.
Conveniently located sight gauges let you check fluid levels at a glance.
Centralized lube banks make greasing less messy.
Color-coded fluid sample and diagnostic test ports help speed preventive maintenance and troubleshooting. Noninvasive design helps prevent contamination.
Conveniently displayed periodic lubrication and maintenance chart helps ensure that nothing is overlooked.
Large hinged doors open wide, providing quick and easy access to the engine and Quad-Cool system.
Hydraulically driven variable-speed fan runs only as needed to help maximize fuel efficiency and reduce noise.
Four-thousand-hour hydraulic filter change interval and large fuel tanks help maximize uptime.
Both sides of all coolers are easily accessible, for quick and easy cleanout. Corrugated fine-mesh screen air cleaner efficiently filters the airflow.