Bearcat BC-502/CRC, Instruction Manual

Page: 82 / 164

BC-502/CRC
82
Setting Spread Rate Manually
a. Use the BearCat Road Oil Spreading Calculator to set the spread
rate manually.
b. Determine the job requirement. For this example, we will assume
it to be 0.4 gallon per square yard (GSY), to be spread over an area
12 feet wide and 1300 feet long.
c. Determine a suitable speed for the truck. In this case, assume
that the chip spreader following you is limited to a speed of 400
feet per minute (4.5 mph). At this point, drive the truck to
determine which gear and what RPM it takes to achieve 400 FPM
(RPM needs to be in the 1000-1200 range to deliver adequate
hydraulic power).
d. Refer to Side 1 of the Road Oil Spreading Calculator. At the top of
the calculator, align TRUCK SPEED (400 feet per minute) with
SPREADING RATE (0.4 gallon per square yard).
e. On the BAR LENGTH scale, locate 12 feet (the desired spreading
width) and immediately above it, read the PUMP OUTPUT in
gallons per minute. In this example, it is 215 GPM.
f. On Side 2 of the Calculator, set the SPREADING RATE (0.4 gallon
per square yard) at the BAR LENGTH
(
12 feet). Read the OIL
REQUIRED in gallons opposite DISTANCE TO BE SPRAYED. Since in
this example the latter is 1300 feet, the Calculator indicates that
the amount of oil required is
700 gallons.
g. On the Cab Console, Check
Master OFF, Selector Switch
OFF, Pump OFF.
h. With Selector Switch select
Spread Heat. Listen for and
check that valves C and E
have opened.
i. Switch to MANUAL.
j. Switch Pump Forward.
(Circulation should start and
GPM should indicate Manual
speed).
k. (With Master OFF), Switch appropriate spray valve switches on.