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REPAIR
KEEP FOR REFERENCE.
Read this and all related manuals for
important warnings and instructions.
INSTRUCTIONS
- For portable spray applications of architectural paints and coatings -
190ESt
Airless Paint Sprayers
3000 psi (207 bar, 20.7 MPa ) Maximum Working Pressure
120 VAC
232900, A, B, C, D
232901, A, B, C
233797, A, B, C
233815, A, B, C
100-120 VAC
232903, A, B
220-240 VAC
232906, A, B
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General Repair Information
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Table of Contents
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First choice when
quality counts.t
ti5875a
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309059
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309061
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309065
5
7
7
6
12
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12
14
Graco Warranty
309063
232900
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309064
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Rev. D
309060
308644
18
21
22
23
24
24
24
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Table of Contents
Related Manuals for Graco 190ES 232903
Summarization of Contents
General Safety Warnings
Fire and Explosion Hazard
Warnings about flammable fumes and ignition sources in the work area.
Electric Shock Hazard
Warnings regarding improper grounding, setup, or usage causing electric shock.
Injection Hazard
Warnings about high-pressure fluid injection injuries from gun, hose leaks, or components.
Equipment Misuse Hazard
Warnings about exceeding pressure/temperature ratings or altering equipment.
Pressurized Aluminum Parts Hazard
Warning against using specific solvents causing chemical reactions and explosion.
Toxic Fluid Hazard
Warnings about potential serious injury or death from toxic fluid or fumes.
Personal Protective Equipment
Recommended protective gear for operation and servicing to prevent injury.
General Repair Information
Pressure Relief Procedure
Critical steps to safely relieve system pressure before maintenance.
Repair and Operation Warnings
Safety warnings for electrical shock, hot surfaces, explosion, and running dry.
Grounding
Grounding Requirements
Specifies circuit requirements and extension cord guidelines for safe grounding.
Troubleshooting - Motor Won't Operate
Basic Fluid Pressure Problems
Checks and solutions for basic fluid pressure issues.
Basic Mechanical Problems
Checks and solutions for basic mechanical issues.
Basic Electrical Problems
Checks and solutions for basic electrical problems.
Troubleshooting - Motor Electrical Issues
Basic Electrical Problems (Continued)
Further checks and solutions for basic electrical problems.
Troubleshooting - Low or Fluctuating Output
Low Output
Diagnosing and fixing issues with reduced or inconsistent sprayer output.
Troubleshooting - Pump Operation Issues
Motor Runs and Pump Strokes
Checks and solutions when motor runs but pump strokes erratically.
Motor Runs But Pump Does Not Stroke
Checks and solutions when motor runs but pump does not stroke.
Troubleshooting - Motor Thermal and Electrical
Motor Overheating and Intermittent Operation
Addressing overheating and intermittent motor operation problems.
Electrical Short Circuits
Troubleshooting electrical shorts that cause breaker trips or system shutdowns.
Spin Test
Setup and Continuity Test
Steps for preparing and performing armature, brush, and motor wiring continuity tests.
Armature Short Circuit Test
Procedure to detect shorts in the motor armature by checking coasting time.
Motor Brush Replacement
Motor Brush Removal
Steps to remove motor brushes, including safety precautions.
Motor Brush Replacement - Installation and Testing
Installing and Testing Brushes
Procedures for installing new brushes and breaking them in.
On/Off Switch Replacement
Removal Procedure
Steps for removing the existing ON/OFF switch.
Installation Procedure
Steps for installing a new ON/OFF switch.
Pressure Control Repair
Motor Control Board Diagnostics
Procedure to diagnose motor control board issues using LED blink codes.
Pressure Control Board Replacement
Motor Control Board Removal and Installation
Steps for removing and installing the motor control board.
Pressure Control Component Replacement
Pressure Control Transducer Replacement
Steps for removing and installing the pressure control transducer.
Pressure Adjust Potentiometer Replacement
Steps for removing and installing the pressure adjust potentiometer.
Drive Housing Replacement
Drive Housing Disassembly
Steps for disassembling the drive housing.
Drive Housing Assembly
Steps for assembling the drive housing.
Motor Replacement
Motor Disassembly and Assembly
Procedures for removing and installing the motor.
Displacement Pump Replacement
Pump Removal
Steps to remove the displacement pump from the sprayer.
Pump Installation
Steps to install the displacement pump with proper torque and sealing.
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