OM5004 Specifications - Section 5 Major Components and Specifications Page 5-1 MAJOR COMPONENTS AND SPECIFICATIONS ENGINE SERVICE BRAKE SYSTEM The 210M HAULPAK ® Truck is powered by a Cummins QSK--19C diesel engine. It is capable of speeds up to 35 MPH (56.7 km/h). The service brakes are controlled by an all hydraulic actuation system. Depressing the service brake pedal actuates front dry disc brakes and rear wet disc brakes. Automatic Emergency Braking is provided if system pressure falls below a preset value. All functioning wheel brakes will be automatically applied by accumu- lators.
TRANSMISSION DYNAMIC RETARDING The diesel engine drives a remote-mounted Allison CLT-6063 transmission incorporating a TC683 torque converter. The transmission has six "Forward" speeds and two "Reverse" speeds and uses Allison Transmis- sion Electronic Control (ATEC) for complete automatic shift sequencing. Dynamic retarding is actuated by depressing the op- erator’s retarder pedal which applies oil-cooled, rear mounted, wet disc brakes only; the front brakes are not applied . Application of the retarder pedal may be fully modu- lated and should be used to slow the truck during normal truck operation, to control speed coming down a grade or to make non-emergency stops.
Use of the retarder pedal saves wear on the front brakes and provides better steering control. The operator may select "R1" or "R2" for Reverse, "N" for Neutral, or any one of the six Forward driving ranges by using the Transmission Range Selector. Each posi- tion (R2, R1, N, D, 5, 4, 3, 2, 1) is selected by releasing a range locking mechanism on the lever and choosing the desired range. "D" will permit completely automatic up and down shifts through all six ranges. "5" will limit upshifts to 5th range only. "4" will limit upshifts to 4th range only. "3" will limit upshifts to 3rd range only. "2" will limit upshifts to 2nd range only.
"1" is a first range hold position and no upshifts are permitted. POWER STEERING The HAULPAK ® Truck is equipped with an orbital power steering system mounted under the cab floor with noise and vibration isolators. An accumulator automatically provides emergency power to safely steer the truck while stopping. "R1" or "R2" REVERSE position is used to back the truck. "R1" position should be used for normal reverse operation. This range selection utilizes the standard 5.12:1 gear reduction ratio. "R2" position may be used for job operations that would benefit from a higher speed reverse operation. This range selection utilizes a 3.43:1 gear reduction ratio.
INSTRUMENTS The cab instrument panel displays for the operator all switches and gauges which are necessary to safely control the truck and monitor the truck’s operating systems. FINAL DRIVE The Planetary Final Drive has full floating axle shafts and a plug-in differential carrier assembly. SUSPENSION HYDRAIR ® II suspension cylinders located at each wheel provide a smooth and comfortable ride for the operator and dampens shock loads to the chassis during loading.