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3.1

"A"

Troubleshooting a 1.0 g.p.m. Pump:

Pump will NOT run:

- Check inline fuse on the wires on the pump. If blown, 

replace with new fuse. (5 Amp mini-blade fuse...#5157204)

- Make sure BOTH on/off switches are in the 'on' position (-).

- Make sure you 12 volt source (battery) is fully charged.

- Insure a tight connection at the battery clips.

If none of the above will work, try pulling wire terminal "A" off 

of the spade terminal of the pressure switch, and cross it 

over and touch terminal "B". (You will need to remove the 

pressure switch cap before doing this) If your pump runs 

when you do this, you know you will need to replace your 

Another thing you can try is to take apart the switch box on 

the lead wire assembly (#5274443) with the (2) phillips head 

screws, and 'hot-wire' it together. Take the (2) wires that are 

screwed to the rocker switch, off of the switch and twist 

them together. This will insure you are getting the full 12 

volts to the pump. If your pump runs after doing this, you will 

know that your lead wire assembly needs to be replaced.

Pump runs, but does not prime:

- Check line strainer (screen) at the inlet location, at the 

tank. You will need to unscrew the knurled nut to access 

this screen. (see exploded view later in this manual) The 

tank should be empty while performing this, otherwise you 

may need to tilt the tank backwards a little bit so any 

solution in the tank will be away from this inlet location. 

Periodically take the screen at this location out and clean it.

- Unscrew (2) screws "S". This will allow you to inspect the 

bearing and counterweight.

- Both the counterweight and the bearing need to spin 

freely, and they both need to spin INDEPENDENT of each 

other. If these 2 pieces are 'stuck' together, you will need to 

break them free with some good quality lubricant or something

similar and this should restore most of your prime.

pressure switch.

4.1

1

Pressure Switch w/Diaphragm

Pump Assembly w/Pressure Switch

Qty

  5157207

  5157201

5275531

5157204

5095202

2

4.1

3.1

3

Item 

No

1

1

1

1

1

Number

Part 

1

Pump Foot (Pkg. of 4)

Rocker Switch

5 Amp Mini Fuse

Description

Pressure adjustment

screw (Factory Preset)

3

"B"

"Half-Moon"

counterweight

Bearing

"S"

4.99

6.99

23.95

37.95

3.99

Price

List 

2

1

(12 Volt, 4 Amp, 1.0 gpm, 35 psi)

#5275702 Pump

Page 2

Operation (continued)

Conditions of weather and terrain must be considered when 

setting the sprayer. Do not spray on windy days. Protective 

clothing must be worn in come cases.

Be sure to read the chemical label(s) correctly.

After testing, add water and chemical to the tank. Adjust the 

pressure and spray as you did in the testing procedure.

After use, fill the sprayer tank part way with water. Start the sprayer, and 

allow the clear water to be pumped through the plumbing system and 

out through the spray nozzles.

Refill the tank about half full with plain water and use a chemical 

neutralizer, such as 'Nutra-Sol', or equivalent, and repeat cleaning 

instructions above. A mix of water and some detergent, such as 'Dawn' 

dish soap would be a sufficient alternative.

Flush the entire sprayer with the neutralizing/cleaning agent, then flush 

out one more time with plain water. Follow the chemical manufacturer's 

disposal instructions of all wash or rinsing water.

For the boom, (if applicable) remove the tips and screens from the 

nozzle assemblies. Wash these items out thoroughly. Blow the orifice 

clean and dry. If the orifice remains clogged, clean it with a fine bristle 

(NOT WIRE) brush, or with a toothpick. Do not damage the orifice. 

Water rinse and dry the tips before storing.

WARNING:

 Some chemicals will damage the pump valves if allowed to 

soak untreated for a length of time! ALWAYS flush the pump as 

instructed after each use.

After Spraying

Winter Storage

Drain all water out of your sprayer, paying special attention to the pump, 

handgun, and valve(s). These items are especially prone to damage from 

chemicals and freezing weather.

The sprayer should be winterized before storage by pumping a solution 

of RV antifreeze through the entire plumbing system. This antifreeze 

solution should remain in the plumbing system during the winter months. 

When spring time comes and you are preparing your sprayer for the 

spray season, rinse the entire plumbing system out, clearing the lines of 

the antifreeze solution. Proper care and maintenance will prolong the life 

of your sprayer.

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