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85812
Conveyor Belt Speed Control:
Located in port “FC” in
the block. The conveyor belt speed control controls the
speed of the conveyor belt by regulating the amount of
hydraulic flow and pressure to the motor.
The conveyor belt speed control valve does not have
any user serviceable parts. If the valve is malfunctioning,
it will need replacement.
S1 and S2 Solenoid Valve Bodies:
Located in ports
“S1” and “S2” in the block. These valves control the
hydraulic flow to the hydraulic conveyor belt motor (S2)
and the spinner wheel hydraulic motors (S1). Both S1
and S2 are electrically operated valves, controlled by
the switch on the hand held ON/OFF control box.
The valves are a “normally open” type valve allowing the
hydraulic flow to bypass the spinner wheel motors and
the conveyor belt motor. When the hand-held switch
is in the ON ( I ) position, the solenoid is activated.
Electrical activation closes the valves and directs the
hydraulic flow to the motors.
The solenoids are a replaceable service part. The
valve bodies do not have any user serviceable
parts. If the valves are malfunctioning, they will need
replacement.
If the solenoids fails to operate, check the following:
● Trucks throttle and/or governor set too low to provide
adequate hydraulic flow or electrical power.
● Bad electrical connection with the truck. Insufficient
electrical power to activate solenoid. Bad ground
connections.
Refer to the “Electrical Systems” maintenance section
in this manual for information about servicing the
electrical connections or the hand-held ON/OFF
control box.
CONVEYOR BELT MOTOR
The conveyor belt motor powers the conveyor belt.
The motor is mounted at the rear of the top dresser, on
the right side of the frame. ON/OFF operation of the
motor is controlled at the hand held ON/OFF control
box. Hydraulic power to the motor is controlled at the
manifold valve block by solenoid S2. The speed of the
motor is controlled by the conveyor belt speed control
(FC) in the manifold valve block.
The motor rotates only in a clockwise direction (as
viewed from the left side of the machine) If the motor is
operating in reverse, check the possibility of reversed
connections at the motor (ports A and B) or at the
manifold valve block (ports M1 and MR).
If the conveyor belt motor fails to operate, check the
following:
● Conveyor belt speed control turned down too far.
● Bad electrical connection with the truck.
● Trucks throttle and/or governor set too low to provide
adequate engine RPM and hydraulic flow.
● Trucks hydraulic flow selector on wrong setting.
● Non-operational hand held ON/OFF switch. Check
for electrical power at solenoid S2 on manifold
valve block.
● Non-operational S2 valve. Valve must close for
hydraulic flow to go to motor.
● Relief valve (RV) is bypassing all hydraulic power
back to the tank.
● Hydraulic fluid level in tank too low.
● Pump not operating.
● Damaged or non-functional motor.
● Pump drive coupling between engine and pump is
inoperable.
● Mechanical problems, check for loose or out-of-line
motor, sheared keys on coupler or broken chain on
coupler (between motor and drive roller shaft).
Hydraulic flow leaving the conveyor motor returns to
the manifold valve block, entering at port “MR”. Flow is
routed through the block and returned to the truck.
SPINNER SPEED CONTROL
The control regulates the amount of hydraulic power
going to the spinner motors. The dial of the control is
calibrated 0 through 4. The numbers on the dial are
calibrated to correspond to percentage of flow; 0 = 0%
flow, 1 = 10%, 2 = 20%, 3 = 30%, 4 = 40% flow. The
numbers 5 through 10 are blocked from use by a stop
plate. Do not remove the stop plate from the speed
control. The hydraulic flow above 4 is being used to
power the conveyor belt motor through the exhaust
(EX) port. Normal setting for operation is 3 to 4.
SERVICE LEVEL MAINTENANCE
