In 1988 The Caterpillar 931C crawler loader was introduced to replace the Caterpillar 931B.
The 931C has a four-cylinder 67 flywheel horsepower (FWHP) 3204 direct injection engine. It comes standard with modified undercarriage and steering clutch and brake linkage.
It was available in two tack gauges – the standard model has a gauge of 56 inches (142 cm) and the Low Ground Pressure (LGP) configuration has a 65-inch (165-cm) gauge.
The 2BJ and 6RF units have a three speeds forward, three reverse powershift transmission. The 7HF and 8AF units have a three speeds forward, one reverse powershift transmission. The 5LG has a five speeds forward, four reverse direct drive transmission.
In 1990 three 931C Series II crawler loaders were introduced (2AK, 6AJ, 9AG). They all come standard with a ground engaging tool (GET) option, a new operator station, and increased breakout force.
The 2AK and 6AJ both have a three speeds forward, three reverse transmission. The 9AG has three speeds forward, one reverse. Production of the 931C Series II ended in 1993.
The new D5G Track-Type Tractor is designed for all of your construction needs.
The D5G has the power of proven turbocharged six-cylinder Caterpillar 3046T engine which delivers plenty of push. The power is smooth and responsive with excellent fuel economy and low noise emissions thanks to the turbocharger and high pressure fuel injection results. The CAT 3046T engine is designed for improved performance at lower engine speeds important for operators working in tight spaces at part throttle.
One thing I’m not a big fan of is the steering is proportionally controlled by the joystick position, but not the speed. Speed is not controlled by proportionally pushing the joystick further forward of backwards, but rather by two push buttons on the joy stick. You push one button to step up the speed, and the other to step it down. Each time you push the button it goes a little faster or a little slower. An indicator on the dash displays the machines current operating speed. When the joystick is moved to the neutral position, the tractor stops.
The D5G easily maneuvers through side loading blade applications by engaging counterrotation briefly to correct machine position. Counterrotation also provides quick and easy maneuvering in confined work areas. The D5G has excellent tracking providing increased productivity on side slopes.
The Variable Pitch, Power Angle and Tilt (VPAT) blade has 14% increased capacity and is designed and built for versatility, durability and strength. The trunion is now mounted on the c-frame instead of the blade and the trunnion ball size has been increased to provide longer life and reduce ownership cost. The pin joints have also been improved to enhance durability and lengthen life. The mainframe has been modelled after larger Caterpillar tractors with a solid back bone for handling forces generated during tough dozing. Robotic welding process delivers reliability and durability need for construction remediation sites.
The redesigned Operator Station is quieter and more spacious, based on the cab designs of the large Caterpillar track-type tractors. A new climate control system, increased leg room and enhanced visibility all enhance the ergonomics.
Other Cab comforts:
• Armrest adjustments
• Directed air vents
• Wide angle rear view mirror
• 12 volt power port
• Radio ready factory installed speaker and antennae
• Dome light
• Coat hook
• Tie down for lunch box
• Air conditioner
The operator station provides an improved view of the blade and work site with 13% more glass area. The Angled doors on the left and right hand sides delivers improved visibility to the blade corners and edges. The operator can easily see blade corners and cutting edges so no more grading by feel.
The D5G combines the power of a larger tractor with the versatility and maneuverability of a smaller machine in meeting a wide range of job applications. Its comfortable operator station, excellent visibility and simple joystick control is everything you expect from Caterpillar.