13
ESS GPS-5 OWNER’S MANUAL
Pop-off valve
The GPS-5™ has a 100 PSI spring-loaded pop-o valve which is con-
nected to the tank pressure regulator. The valve relieves pressure
greater than 100 PSI to protect the sprayer from being damaged by
extreme air pressure.
If the pop-o valve blows, shut o the sprayer immediately. Deter-
mine the cause of the out-of-range air pressure and repair. Replace the
pop-o valve (ESS S/N 62).
Tank pressure regulator
The tank pressure regulator controls the amount of pressure in the
tank pressure line. Optimum tank pressure is 12-15 PSI.
To set the tank pressure:
Start engine. Pull the adjustment knob’s black plastic cover to un-
lock it. Turn left (counter-clockwise) to decrease pressure; turn right
(clockwise) to increase pressure. Set the pressure between 12 to 15 PSI
(marked in light green). Push the black plastic cover in to lock the new
setting.
Note: For best results, set the pressure from a lower pressure to a high-
er pressure. If the pressure is set too high, adjust the regulator below
the desired pressure then adjust it up to the desired pressure.
Tongue handle
The tongue handle can be pulled by hand or attached to a small mo-
torized vehicle for towing. In order to pull the sprayer, the vehicle
must have a hole on the back of its chassis frame for a pin. Place a pin
through the hole in the tongue handle and through the hole in the
vehicle to pull the sprayer.
Keep safety in mind and use common sense when towing the GPS-5.
Do not allow passengers to ride the GPS-5. Do not exceed a safe speed
for the conditions and terrain. Use caution on turns and sharp curves
as the sprayer may tip over.
NOTE: ESS will not be held responsible for accidents that
occur as a result of hazardous operations.
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