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Product
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pressure Gauge tube Assembly
1. Determine the location at which the coupler is to be installed. Cut
the tubing at that point.
2. Remove the tube nuts from the 3 couplers and slide the tubing
through the nuts. The threaded portion of the nut should face their
respective couplings. The tube should protrude approximately ½”
beyond the nut.
3. One brass tube insert is provided. This must be used with the
gauge coupling assembly.
4. A ¾” x ¾” nylon close nipple is provided if a male connected is
needed with the gauge tee fitting.
5. Fluid leakage around the gauge indicates a poor connection or a
defective gauge.
NOTE: All cables and tubes should be out of the way of the operator’s
feet and path so that they cannot be snagged or pulled. These
tubes should be routed around sharp metal objects, edges,
and moving parts with enough slack that they will not be pulled
apart when sharp turns are made.
Figure 8: Pressure Gauge Tube Assembly
21720-8
DC: XX /XX
45- 20091
45- 20090
DC:XX/XX
744A Sprayer Control
Solenoid Harness
Solenoid Harness
Solenoid Shutoff Valve
Pipe Nipple
Optional Isolator Kit
Tube Insert
Tube Nut
Tube Insert
Gauge Elbow
Tube Coupling
Tube Nut
Tube Nut
Tube Nut
Tube Insert
Tube Insert
ChApter 3 - MAIntenAnCe
routine procedures
Several routine procedures should be followed to help maintain the
744A Sprayer Control system.
1. Check all wires and connections for wear, damage, and frayed
ends to prevent shorting out of the system.
2. Make sure that the mounting bracket for the 744A Sprayer Control
is mounted securely.
3. All connections and terminals should be free of corrosion.
4. The control unit is designed so that it may be removed, cleaned,
and stored during periods of non-use to protect it from extreme
heat or cold.
5. The 744A Sprayer Control is NOT WATERPROOF. Do not immerse
the unit when cleaning.
6. Periodic flushing of the sprayer will help prevent clogging due to
residue buildup.
removal of Control Unit
1. De-pressurize the system.
2. Uncouple the nylon pressure tube from outside the vehicle cab and
allow the liquid to drain. Uncouple the tube from the bottom of the
unit.
3. Disconnect the input power cable from the back of the unit.
4. Disconnect the output control cable from the back of the unit.
5. Loosen the triangular knobs on both sides of the unit and slide the
unit off of the bracket.
