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Repair Interior Texture Sprayers RTX 900 & RTX 1250 For Water-Based Materials Only Models: 254974 and 254975 70 psi (0.49 MPa, 4.9 bar) Maximum Fluid Working Pressure Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions.
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The following are general warnings related to the setup, use, grounding, maintenance and repair of this equipment. Additional, more specific warnings may be found throughout the body of this manual where applicable. Symbols appearing in the body of the manual refer to these general warnings. When these symbols appear through the manual, refer back to these pages for a description of the specific hazard.
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Warnings Warnings Electric Shock Hazard To reduce the risk of electric shock: • Be sure sprayer is adequately grounded through electrical outlet, page 6. • Use only 3-wire, extension cords. • Make sure ground prongs are intact on sprayer and extension cords. •...
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Warnings CAUTION Water or material remaining in unit when temperatures are below freezing can damage motor and/or delay pump startup. To insure water and material are completely drained out of unit: 1. Remove material line from sprayer. 2. Tip sprayer up as shown. ti9016a Before adding material or starting unit in cold weather, run warm water through pump.
Pressure Relief Procedure To reduce risk of injury, follow this procedure whenever you see this symbol throughout this manual, Also, perform this procedure whenever you: • Stop spraying • Check or repair any part of this system • Install or clean spray nozzle 1.
Shroud Removal Disassembly 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Loosen bottom hopper fitting by hand and pull hopper up and off from handle. ti8871a 4. Loosen and remove 2 knobs (14) on sprayer handle (12).
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Reassembly 1. Angle left shroud half (5) into base and push down into place. Then replace right shroud half (7). ti9015a 2. Replace and tighten second screw (30). 3. Swing access door down (RTX 1250) and tighten knob (42). 4. Tighten screw (70) into lower right corner of side access plate.
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RotoFlex™ II Pump (RTX 900) RotoFlex™ II Pump (RTX 900) Disassemble 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Remove Shroud, page 7. 4. Loosen and remove screw (28) on hose bracket. ti9009a 5. Remove hose bracket (25).
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RotoFlex™ II Pump (RTX 1250) Disassemble 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Loosen knob (42) on side access panel. ti8870a 4. Remove screw (70) from side access panel. ti8874a 5. Pull access panel (13) out to release 3 fastening tabs and flip up to expose side access to pump.
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RotoFlex™ II Pump (RTX 1250) Reassemble 1. Bend hose (16) so colored dots on hose fittings face each other. 2. Slide new pump hose (16) in from side access panel. Move pump rollers by hand until or flip power switch to rotate rollers until they are positioned cor- rectly with pump hose.
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Use Compressor Repair Kit, 288612. Disassembly 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Remove Shroud, page 7. ™ 4. Remove RotoFlex II Pump hose; page 9 or 10. 5. Unscrew and remove grounding screw (49) from compressor.
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Compressor Reassembly 1. Carefully position compressor back into sprayer body. Make sure piston head facing front of sprayer. ti8950a 2. Replace and tighten grounding screw (49). ti8941a 3. Reattach air lines to compressor. 4. Reattach 2 wires to compressor see Wiring Diagram, page 27.
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Use Piston/Cylinder Repair Kit 288609. Disassembly 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Remove Shroud, page 7. ™ 4. Remove RotoFlex II Pump hose; page 9 or 10. 5. Remove Compressor, page 12. 6. Remove muffler (110) from head (74) by pulling straight out by hand.
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Piston/Cylinder Reassembly CAUTION Piston and cylinder come packaged together. Do NOT let piston and cylinder come apart. If they do, make sure you drop the piston down through the top of the cylinder and tilt the piston as you pull it through the cylinder. Do NOT push the piston up from the bottom.
Use Valve Plate Repair Kit 288610. Disassembly 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Remove Shroud, page 7. ™ 4. Remove RotoFlex II Pump hose; page 9 or 10. 5. Remove Compressor, page 12. 6. Remove muffler (110) from head (74) by pulling straight out by hand.
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Motor Use Motor Repair Kit 288613. Disassembly 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Remove Shroud, page 7. ™ 4. Remove RotoFlex II Pump hose; page 9 or 10. 5. Remove Compressor, page 12. 6. Remove compressor from sprayer body and place it in a vice.
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Reassembly 1. Angle motor pulley through compressor belt (84) and pull motor (71) into position. When replacing motor (71), make sure the square-shaped hole (SQ) is facing toward the out- side of the compressor. This hole will be used to torque the mounting bolts.
Cooling Tube Use Cooler Repair Kit 288614. The cooling tube is extremely hot and can cause serious burns. Allow unit to completely cool before servicing the cooling tube. Disassembly 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3.
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Reassembly 1. Insert new cooling tube fitting and use 5/8 in. wrench to tighten. 2. Insert cooling tube (79) and push into new fitting (86). Make sure tube is fully seated. CAUTION When replacing cooling tube, make sure coil is facing up when you push the tubing into the fitting.
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Use Roller Pulley Repair Kit 288616. Disassembly 1. Relieve Pressure, page 6. 2. Unplug sprayer from outlet. ti2810b 3. Remove Shroud, page 7. ™ 4. Remove RotoFlex II Pump hose; page 9 or 10. 5. Remove Compressor, page 12. 6. Use 7/32 in. allen wrench to loosen roller mounting bolt (87) and remove roller pulley (73).
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Selector Switch Knob Use Knob Repair Kit 288756. Disassembly 1. Turn selector switch knob clockwise as far as it will 2. Use wrench to remove nut from knob. 3. Pull knob straight off from sprayer. Once knob has been removed, don’t move the exposed spline.
Troubleshooting Problem Sprayer won’t run Pump won’t pump material Material runs out of bottom of sprayer Pump hose worn out No air from compressor 311772G Troubleshooting Cause Power switch not on No power at wall outlet Wrong size generator Breaker tripped Air lock Selector switch in wrong position Mix too thick...
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Problem Speed of application slow or slower Intermittent flow/sputtering Quick disconnect does not stay con- nected. Gun will not shut off Fluid leaking at Flow Adjustment Nut Damaged seal. Fluid leaking out of either plug Needle adjustment won’t adjust Cause Material too thick Nozzle too small Too much air being used.
Wiring Diagram Green Wire (GND) Power Cord Black Wire RTX 900 Air Valve Cylinder Relief Valve Manifold on Compressor Air Outlet 311772G Wiring Diagram White Wire Motor Switch Air Diagram Cylinder ti9232a Compressor ti8937a RTX 1250 Gauge Air Valve Regulator...
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Parts Parts Models 254974 and 254975 (RTX 900) (RTX 1250) (RTX 900) ti8901c (RTX 900) (RTX 900) 311772G...
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Parts • RTX 1250 Only 311772G Parts Models 254974 and 254975 RTX 1250 Only • • • ti8902b...
Graco Standard Warranty Graco Standard Warranty Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.