HD4000 Battery-Powered Backpack and Cart Sprayer

Grab your PetraTools HD4000 box.

Take out what's inside the accessories bag.

• Valve Handle
• Nozzles
• Plumber’s Tape
• Charger
• Set of Gaskets & O-Rings

Assemble the HD4000 Battery-Powered Backpack Sprayer.

• Thread the valve handle onto the hose.
• Thread the wand onto the valve handle.
• Select the nozzle you'll be using.

Fully charge your HD4000 before using it on your first job.

Prime the pressure sprayer before you use it for the first time.

Add liquid of your choice through the mesh strainer in the lid.

Turn the pressure dial clockwise until the unit pumps and pauses.

Squeeze the valve handle and engage the red locking mechanism for continuous flow.

Make sure that the pressure adjustment knob is turned off when you're finished.

Check the switches.

Turn off when not in use: Always make sure the red rocker switch and silver pressure knob are in the OFF position when the sprayer is not in use.

Keep the switch and knob turn off to avoid draining the battery.

Rotate the silver knob counterclockwise until you hear it click to turn off.

Check if the lights in front of the unit are turning on.

There are two light colors on the front of the unit - green and red. The red light shows that the unit is on and green means that the battery is charged.

Check the fuse.

To check the fuse, remove it from the control panel and take a good look at it. The fuse has a filament inside of it. Make sure that there is no burning inside and that the filament is attached correctly. Replace with the included spare if required.

Check if the battery is charged.

To do this, try plugging the charger into the unit. If the unit is charging, the charger light will turn red. When doing so, make sure that you are plugging the charger into a working outlet.

Test the battery.

To determine if the battery is working or not, plug the charger into the unit and turn it on, bypassing the battery.
If the unit works while plugged in, the battery may need to be replaced.

If the unit still doesn't work, the issue could be with the pump or other components.

Check the battery terminal connections.

There could be times that the battery terminals aren’t connected to the wires. To determine if this is the case, open the compartment at the back of the unit and take off the velcro strap. Check that both wires are connected properly to the battery & ensure that moisture hasn’t made its way into the compartment.

Access the internal wiring.

If you have worked through the steps above, and the unit is still not working, you might want to check the wiring inside the base of the unit. To do this, separate the unit and the tank by removing the Phillips screws from the base, then inspect if the wires are connected properly.

Ensure both the silver pressure knob & the red rocker switch are in the off positions.

Locate the battery. On the back of the unit you’ll find a small access door. Push the retaining button in to open. The Velcro strap holds the battery in place. Remove it.

Remove the black and red wire connecting the battery to the device. You'll see that there are two wires connecting the battery to your device. One is black and one is red. Gently remove these.

Take out the old battery. The old battery will now come out easily. Just pull it out of the compartment.

Take your new battery and insert it into the compartment, making sure that the terminals are in the back, closest to the door, with the red terminal on the left.

Take the black and red wires and reconnect them to the new battery. Make sure that they're snug and secure.

Close the access door by pushing it in until it clicks.

Ensure both the silver pressure knob & the red rocker switch are in the off positions.

For safety, remove and disconnect the battery from your unit prior to replacing the pump. Follow the steps above for this process.

Disassembly

Lay the sprayer on its side and locate the two Phillips screws securing the tank to the base. Unscrew them using a long screwdriver, as they are recessed approximately 5 inches into the unit.

Disassembly

Take those two screws out so you can separate the bottom part of the sprayer from the tank itself. Put them in a safe place!

Pump Replacement

Remove the three screws holding the pump to the unit. Set the screws aside for later.

Pump Replacement

Use a flat-blade screwdriver to loosen the hose clamps securing the hoses on either side of the pump. Pull the hoses to remove from the pump. A rotating motion can help.

Pump Replacement

Cut the wires. - Disconnect the wires which are connected to the device. Cut the plastic tie first before doing so. Ideally, leave at least 4-5 inches on the wires. These can be disconnected by gently pulling on them.

Pump Replacement

Strip the wires. - Strip about a half-inch of the plastic casing of the wires so that they can be reconnected more easily.

Pump Replacement

Reconnect the wires. - Reconnect the wires to the device, being careful to not cross any of them. Make sure they're snug and secure.

Pump Replacement

Install the pump. - Install the new pump by screwing it in and attaching the hoses. Be sure to put the hose clamps back on so that they're snug and secure.

Reassembly

To reassemble your HD4000, ensure that the screw holes & outer casing parts match up. You should be able to easily tighten the two screws removed in step 1 above.

Empty any remaining solution from the tank and rinse it thoroughly with clean water.

Add 16 oz of warm, soapy water to the tank

Turn on the pump and squeeze the handle to run the warm, soapy water through the pump, hose, and nozzle

Empty the soapy water and rinse the tank, hose, and nozzle with clean water a final time

Let the sprayer air-dry, and store it in a cool, dry place.

Add 1 gallon of warm, soapy water into the tank

Tighten the lid and turn on the unit.

Turn the red rocker switch to the ON position (O=Off).

The pump should engage immediately and build pressure. Squeeze the trigger to spray the soap solution through the unit. Ordinarily, spray begins in just a few seconds, but for the first use or the first use of the season, it may take several minutes.

Run 1 gallon of warm water mixed with 1 teaspoon of liquid dish soap through the unit to clean all internal parts.

Empty the soap solution and then run 1 more gallon of warm water through. Spray until the unit, wand & hose are empty.

For best results, fully charge your battery before storage.

Store your sprayer in its original closed box if possible or cover it with a canvas or plastic tarp to protect it.

Please keep the unit stored in a location where the temperature remains above freezing.