How do you replace the pump hose inside the unit?

The unit uses a peristaltic pump, with two motor driven rollers alternately squeezing the hose and pushing material forward. You will need a #288623 replacement pump hose. This is for an RTX2000pi. The 1400 pi and 2500pi are very similar.

• Turn off the sprayer and wait 7 seconds for power to dissipate
• Unplug the sprayer
• Back off the material feed control to minimum so the tension on the hose is less.
• Relieve the air pressure in the air hose with the priming valve.
• Disconnect all the hoses from the front of the unit.
• Remove the material hopper.
• Remove the pump access door on the left side of the unit. It's the side opposite the switch side
  • You will need a 3/8" nut driver to undo the bolt.
  • You can rotate it up out of the way and then tighten the knob that also holds the plate so it stays up
• Remove the knob right next to the place where the hopper connects to the inlet port . This holds on the hose plate.
• Lift off the hose plate.
• You can slide the pump hose to the left
• Squeeze the pump hose together and remove it from the unit.
• Install the new hose (the clear part toward the rollers).
• Slide it to the right so the grooves on the hose couplings are held by the front plate of the unit.
• Replace the hose plate and reassemble the remainder of the unit in reverse order.

Here's a link to a video from Graco of the whole process.