Locke TR-30 - Manual (Page 20)

Boom Height
The boom height should be 24” as measured from the
nozzle to the ground surface. This is the standard
boom height for all turf booms. This distance is set dur-
ing assembly and should not be changed. Any change
in this height will affect the spraying coverage. At a
boom height of 24” the overlap of the nozzles is 100%.
Tank Straps
The tank straps that wrap around the sprayer tank may
become loose after the first few hours of operation.
This occurs when the tank settles in the saddle. Poly-
ethylene tanks are especially susceptible to this. Re-
tighten the tank straps to secure tank.
Pump Mount
Check the hardware mounting the pump to the sprayer
frame after the first few hours of operation. Tighten if
necessary.
Solenoids & Throttling Valves
(Manual Control System Only)
The electrical solenoids used to turn on the individual
boom sections are three way valves. These valves
route the product flow to the boom sections or back to
the tank sum, depending on whether the boom section
switches on the control box are turned on or off.
When a boom section switch is turned to the off posi-
tion, the electric solenoid is de-energized and the valve
is closed, diverting the flow back into the tank sum. To
insure that the flow going to the boom section and the
flow going back to the tank’s sump are the same, a
throttling valve is used to adjust the flow returning to
the suction inlet of the pump. If the throttling valves are
not set equally, their flows are not equal and every time
the boom section switch is flipped, the pressure will
either rise or decrease in the other boom sections,
causing the sprayer to over or under apply chemical in
those boom sections.
To set the three solenoid throttling valves, refer to Cali-
brating the Throttling Valves in “General Operations”
section starting on page 21.
Pressure Adjustments
(Manual Control System Only)
One fo the most important areas of controlling the
sprayer accuracy is to have the proper pressure when
spraying. Refer to Pre-setting the Pressure Control
Valves in “General Operations” section stating on
page 21.
The pressure is determined when the sprayer is cali-
brated. Refer to Calibration Method #1 in the “Turf
Application Guide” section starting on page 16.
The electric pressure control valve is used to adjust the
pressure to the booms. It is controlled with the
Pressure adjust switch on the control box. The boom
pressure is displayed by the boom pressure gauge. To
adjust the pressure, hold the pressure adjust toggle
switch up for more pressure, down for less pressure.
When the manual pressure adjustment valve is fully
opened, the pressure adjust switch is very sensitive.
To decrease the sensitivity of the pressure adjust. Set
the manual pressure adjustment valve.
To set the manual pressure adjustment valve, fully
open the electric pressure control valve with the pres-
sure adjustment switch. Close the manual pressure
adjustment valve so the pressure is about 20 psi
greater than the desired application pressure. With this
valve set, it will decrease the flow through the electric
pressure control valve and reduce the sensitivity of the
pressure adjustment switch.
Solenoid Valve Adjustment
Refer to Figure 4-1:
NEVER REMOVE THE THROTTLING VALVE FROM
THE VALVE BODY WITH CHEMICAL IN THE
SPRAYER. DOING SO WILL CAUSE A CHEMICAL
SPILL AND WILL EXPOSE YOU TO THE CHEMI-
CALS, CAUSING PERSONAL INJURY AND DAM-
AGE TO SURROUNDING VEGETATION AND/OR
PROPERTY.
The solenoid valves must be properly adjusted in order
for the valve to stay open for long periods of time while
spraying. Also, if the solenoid is out of adjustment, the
valve may leak through the bypass port.
If sections of the boom switch off by themselves during
spraying and the coil (#1) is hot, the valve is out of ad-
justment. This can be corrected by adjusting the arma-
ture stop.
Valve Adjustment Procedure
1. Make sure that the Boom Control Switches are in
the “off position before continuing.
2. Loosen the jam nut (#2) with a box-end wrench.
3. While holding Jam Nut #2, turn the armature stop
(#3) clockwise with a large standard screwdriver
1/4 turn.
4. Now turn on corresponding switch and listen for a
“click” indication coil is energized.
5. Repeat step 4 until a “solid” contact sound is heard.
This adjustment is necessary only if you have prob-
lems with the solenoid.
6. After adjustment is made, tighten jam nut.
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