How To Replace The Pump On A TPS25 Backpack Sprayer

The Tomahawk 5 Gallon Gas Power Backpack Sprayer has a pump that regulates the pressure of your spray. The pump is located underneath the chemical tank and behind the engine housing.

Over time, your pump may need to be replaced to maintain the best possible pressure.


Switch out your pump with this step-by-step guide: 


What You Will Need:

  • Backpack Sprayer (TPS25)
  • Pump
  • Needle Nose Pliers 
  • 10mm socket wrench 



Step 1:

Remove both plastic nuts from the bottom of the backpack sprayer.

Step 2:

Using a 10mm socket wrench, unscrew the 3 bolts on the bottom of the backpack sprayer.

Step 3:

Pull the base of the backpack sprayer down, while pushing the tank up, to separate the base from the tank.

Step 4:

Use needle nose plyers to remove the clamps on the tubes connected to the tank.

Step 5:

Pull the tubes out from the tank.

Step 6:

Pull out the engine housing, along with the pump out of the unit.

Step 7:

Use a 10mm socket wrench to unscrew the 4 screws that hold the pump and engine together.

Step 8:

Remove the old pump.

Step 9:

Use a 10mm socket wrench on the 4 screws to connect the new pump to the engine.

Step 10:

Place the engine, along with the new pump, back into the unit.

Step 11:

Insert both clear tubes into the tank.

Step 12:

Use needle nose plyers to secure the clamps onto the clear tubes.

Step 13:

Reconnect the tank to the base.

Step 14:

Use a 10mm socket wrench to tighten the 3 screws on the bottom of the backpack.

Step 15:

Screw the two plastic nuts on to the bottom of the backpack sprayer to secure in place.


Now that your new pump is installed, your backpack sprayer is ready to go! 


We hope this guide helped you get the most out of your backpack sprayer. Check back in to Tomahawk's comprehensive library of manuals, assembly guides, videos, & more to power your world! 

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