Bearcat BC-2016/CRC, Instruction Manual, Page: 12 / 95

12
2016
Power Train
Tandem Series Chippers are equipped with a Cumins Tier3 QSB6.7L
6-cylinder diesel engine. The engine crankshaft is coupled to a 130cc
variable displacement axial-piston, high torque hydrostatic pump, that
drives a 160cc variable displacement hydrostatic transmission and two-
speed transfer case which mechanically drives a limited-slip front axle.
The transfer case has a rear output for a rear drive axle in the optional
four wheel drive unit.
The particular configuration
of the Chipper power train,
consisting of front drive
(limited-slip), hydrostatic
transmission and transfer
case, and single hydraulic
motor, provides outstanding
control and traction far exceeding that
previously available. The automotive drive
control monitors engine RPM to maintain peak
horsepower in all pulling conditions.
In addition, the hydraulic motor is equipped with a Low-Lock function.
With Low-Lock selected, the hydraulic motor is held in full displacement
by an electrically actuated solenoid. Low-Lock acts as a speed-limiting
device and eliminates any undesired acceleration by the chip spreader
on downhill grades. This function also doubles the control resolution
giving the operator better or less sensitive movement control.
An optional four-wheel drive system is available for terrain/grade-ability
situations that require additional traction or control.
Conveyors
Tandem Super Chipper 10’-20’ employs two hydraulically driven 30-inch
wide conveyor belts and the Tandem Stealth Chipper 8’-16’ employs
two hydraulically driven 20-inch wide conveyor belts to move aggregate
from the receiving hopper to the spread hoppers. The belts form a 30°
-trough angle, which increases the belt load capacity. They are capable
of carrying 4x the volume of rock as a conventional flat belt. The belt
motion is controlled by servo-actuated valves that receive signals from
level-sensing ultra-sonic sensors mounted at the top of each spread
hopper.