Official Troybilt gas pressure washer parts

Replacing the chemical injection valve in your TroyBilt gas pressure washer

• Wear work gloves to protect your hands.
• Disconnect the sparkplug wire from the spark plug.
• If detergent is in the detergent reservoir, clamp the chemical injection hose near the chemical injection valve. Use an open-end wrench to turn the chemical injection valve counter-clockwise and remove it.
• Install the O-ring on the new chemical injection valve. Lubricate the O-ring with silicone lubricant. Thread the new chemical injection valve into the pump and tighten. Reconnect the chemical injection hose. Release the clamp from the chemical injection hose, if used.
• Reconnect the spark plug wire.

Troubleshooting your TroyBilt gas pressure washer when it produces weak spray

An insufficient water supply can cause low pressure at the nozzle. Check the water pressure at the source and the flow connected to the inlet of the pressure washer. Check the inlet screen for a clog that could be blocking inlet water flow.

Check whether a low-pressure spray tip is installed on the wand; if so, install a different nozzle. A problem with the wand or pressure hose can also cause low nozzle pressure. Clean or replace the wand if necessary. Replace the pressure hose if it's clogged.

A pump failure can cause low nozzle pressure. Replace the pump check valves or replace the entire pump if it doesn't build up adequate spray pressure. A stuck unloader valve can also cause low pressure at the nozzle. Replace the unloader valve if it sticks open and constantly recirculates water back to the pump inlet.