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How to 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 dissipateUnplug the sprayerBack 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 sideYou 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 upRemove 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 leftSqueeze 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.
