SERVICE LEVEL MAINTENANCE
34
The hydraulic flow going out of the speed control at the
exhaust port (EX) is directed back to the manifold valve
block (port EX) and is used to power and control the
conveyor belt motor.
The spinner speed control does not have any user
serviceable parts. If the valve is malfunctioning, it will
need replacement.
LEFT AND RIGHT HAND SPINNER WHEEL
HYDRAULIC MOTORS
The spinner wheel hydraulic motors receive hydraulic
power from the manifold valve block solenoid valve S1.
Activation of the solenoid valve S1 is controlled at the
hand held ON/OFF switch. Hydraulic flow from the block
(port PF) is routed through the spinner speed control.
The controlled flow from the speed control (port CF) is
sent to the left hand motor port “A”. Flow leaves the left
hand motor through port “B” and enters the right hand
motor at port “B”. Flow out of the right hand motor joins
the case drain from the left hand motor and returns the
manifold valve block at port “SR”.
The direction of rotation is opposite from each other.
The right hand spinner wheel rotates counterclockwise,
the left hand spinner wheel rotates clockwise (as viewed
from the rear of the 1530). The spinner wheels are a
direct drive from the hydraulic motors.
Seal Kits are available for the spinner motors, order
Turfco part number 664225.
If the spinner motors fail to operate, check :
● Quick–disconnects not attached. Check one at port
“SR” on the manifold valve block and one on the
opposite end of the hose connected to port “CF” on
the spinner speed control valve.
● Spinner Speed Control set to low.
● Check for restricted operation with other
components. Check for a buildup of top dressing
material or obstructions caught under the spinner
wheels. Spinner wheels should not rub on the
directional shields.
● Check for loose hydraulic motors or out–of–position
hydraulic motors.
● Relief valve is bypassing all hydraulic power back
to the tank.
● Pump not operating.
● Damaged or non-functional motors.
● Mechanical problems with the motor and the
spinner wheel coupler. Check for sheared keys or
damaged coupling spider.
● Loose motor, check mounting screws and mounting
position.
Hydraulic flow leaving the spinner motors returns to
the manifold valve block, entering at port “SR”. Flow
is routed through the block, sent to the hydraulic filter
assembly, and returned to the reservoir.
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 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 tow vehicle.
Electrical power supplied by tow vehicle too low to
operate both S1 and S2 solenoid valves.
● 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.
● Pump not operating.
● Damaged or non-functional motor.
● 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, sent to the hydraulic filter
assembly, and returned to the reservoir
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 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 5 is being used to power the conveyor belt
motor through the exhaust (EX) port. Normal setting
for operation is 4 for Heavyspread and 3 or less for
Lightspread operation.
The hydraulic flow enters the speed control at the input
port (IN). Flow comes from the manifold valve block
(port PF).
The controlled flow going out of the speed control at the
controlled flow port (CF) goes to the spinner assembly
to power the spinner wheel hydraulic motors.
