Bearcat BC-502/CRC, Instruction Manual

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Additional Engine
The additional engine option uses an engine mounted to the distributor
body to power the hydraulic system. The additional engine has the
hydraulic pumps direct mounted and is used primarily for applications
where the truck PTO or crank drive is not feasible or the horse power
required is in excess of truck engine capabilities. Distributors equipped
with an additional engine do not depend on the truck engine for
powering the hydraulic pump on the distributor.
Hydraulic Reservoir and Filter
Hydraulic fluid for the hydrostatic pump
and motor is stored in a 15 gallon tank
mounted to the frame. The system uses
ISO 46 Hydraulic Fluid. The tank includes
a sight glass that indicates the presence
of sufficient fluid to operate the system.
The tank has an internal 100 mesh
suction screen. A 10 micron return filter
is located immediately adjacent to the tank. A pressure gauge mounted
on the filter housing serves as an indication of the condition of the filter
element. When the element is clean and unobstructed, the gauge will
indicate pressure in the range 0 to 24 PSI.
Hydrostatic Pump
A heavy duty, variable displacement
hydrostatic pump is used to drive the
hydrostatic motor that turns the asphalt
pump through a 3.5 to 1 planetary gear
box. The hydrostatic pump is a sealed, self-
lubricating unit. It operates in either the
forward or reverse direction, at any speed within its operating range.
Control of the speed of the pump is determined in one of two ways:
a. CRC control: Computerized Rate Control (CRC) automatically
adjusts the pump speed to achieve the desired spread rate at