TeeJet 744E SPRAYER CONTROL - Manual (Page 12)

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744E Sprayer Control
CHAPTER 2 - INSTALLATION
Mounting Bracket
1. Make sure all switches on the 744E Sprayer
Control are turned to the “Off” position.
2. Determine the best location for the 744E Sprayer
Control in the vehicle cab according to the following
guidelines:
• pressure gauge should be readily visible
• switches should be within easy reach
• controller bracket should rest on a flat surface
• 12 volt DC power source must be accessible
(maximum draw 10 amps)
3. Determine the proper routing for power cables and
pressure tube:
• away from operators’ movement area
• away from moving parts
• away from sharp objects
4. Install the mounting bracket using ¼″ (6.4 mm) drill,
machine screws, nut, washers and lock washers
as illustrated below. Attach the control housing
assembly to the mounting bracket using the
console adjusting knobs and washers.
Figure 2-1: Mounting bracket
Pressure Gauge
The tubing for the pressure gauge is supplied as part of
the wiring harness. To avoid chemical leakage into the
vehicle cab, the tube coupler must be installed outside
of the vehicle cab. If a gauge isolator is used with the
system, it should be installed in place of the coupler,
also outside of the vehicle cab.
The pressure gauge should be checked for accuracy
each season. If the unit is equipped with a liquid-filled
gauge and it does not read accurately, the gauge may
need to be vented. To vent the gauge, remove the four
screws in the back of the sprayer control housing and
lift off the back. The rear of the gauge will be exposed.
To vent the gauge, clip off the nib of the rubber plug
in the back of the gauge or puncture it with a needle.
Once the gauge has been vented, do not store the
sprayer control on its back as this may cause a loss
of fluid from within the gauge. If further inaccuracy
is suspected at 0 PSI (0 bar) and a gauge isolator
is being used, the isolator line may need to be bled
according to the instructions furnished with the gauge
isolator.