Graco 309674M - Manual

Installation 6 309674M Installation Grounding and Electric Requirements The sprayer must be grounded. Grounding reduces the risk of static and electric shock by providing an escape wire for the electrical current due to static build up or in the event of a short circuit. The sprayer power cord inclu...

Operation 309674M 7 Operation Pressure Relief Procedure To reduce risk of injury from injection, follow this proce-dure whenever you are instructed to relieve pressure, stop spraying, service equipment or install or clean spray tip. Read warnings, page 3. 1. Turn power switch OFF and unplug power co...

General Repair Information 8 309674M General Repair Information Flammable materials spilled on hot, bare motor couldcause fire or explosion. To reduce risk of burns, fire orexplosion, do not operate sprayer with cover removed. • Keep all screws, nuts, washers, gaskets, and electri-cal fittings remov...

Troubleshooting 309674M 9 Troubleshooting Type of Problem What to Check (if check is OK, go to next) What to Do (When check is not OK, refer to this column) Basic fluid pressure problems Pressure control knob setting. Motor will not run if at minimum setting (fully counter-clockwise). Slowly increas...

Displacement Pump Replacement 309674M 15 Displacement Pump Replacement See manual 309053 for pump repair instructions. Removal 1. Flush pump (13). 1. Relieve pressure, page 7. 2. (Style A) Loosen screws (12) and rotate cover (70). Note: Style A is shown in most illustrations. (Style B) Loosen screws...

Drive Housing Replacement 309674M 17 Drive Housing Replacement Removal 1. Relieve pressure , page 7. 2. Disconnect power cord from outlet. 3. Remove screws (12) and pump rod cover (70). 4. Remove pump (41), Displacement Pump Replace- ment , page 15 5. Remove screws (12) from shroud (23). 6. Remove s...

Motor Diagnostics 18 309674M Motor Diagnostics Spin Test *Note: Motors used in the UltraMax II, Ultimate MX II and ST Max II 490/495/595 model sprayers are brushless. The following brush information and instructions apply to Ultra, Nova and ST Max 395/495/595 model sprayers only. Check for electrica...

Fan Replacement 309674M 19 Fan Replacement Removal 1. Relieve pressure , page 7. Disconnect power cord from outlet. 2. Remove four screws (12) and shroud (23). 3. Loosen tensioning screw (126) on fan (125). 4. Pull off fan (77). Installation 1. Slide new fan (125) in place on back of motor. Be sure ...

Motor Brush Replacement 20 309674M Motor Brush Replacement Note: Motors used in the UltraMax II, Ultimate MX II and ST Max II 490/495/595 model sprayers are brushless. The following brush information and instructions apply to Ultra, Nova and ST Max 395/495/595 model sprayers only. The Utlra, Nova an...

Motor Brush Replacement 309674M 21 Motor Brush Installation 1. Install new brush (G) with lead into brush holder (D). 2. Slide brush lead (E) onto terminal (F). 3. Install spring clip (B). Push down to set hook (C) into brush holder (D). 4. Repeat for other side. 5. Test brushes. a. Remove pump. Dis...

On/Off Switch Replacement 22 309674M On/Off Switch Replacement 100/120 VAC Ultra and ST 395/495/595 models Removal 1. Relieve pressure , page 7. 2. Remove four screws (12) and pressure control cover (50). 3. Disconnect two wires (A) from ON/OFF switch (58). 4. Remove toggle boot (30) and locking rin...

On/Off Switch Replacement 309674M 25 Wiring Diagram 02725 WLD ON/OFF Switch Ground Black Ref 30 Power Plug Ref 56 White Black Pressure Transducer Ref 38 Potentiometer Ref 37 J11 J12 Black Green 210 211

Pressure Control Repair 26 309674M Pressure Control Repair Motor Control Board Ultra, Nova, and ST Max 395/495/595 Models Refer to wiring diagram for your sprayer shown on pages 22, and 23. Removal 1. Relieve pressure , page 7, and unplug sprayer. 2. Remove screws (12) and cover (50). 3. Disconnect ...

Pressure Control Repair 309674M 27 Motor Control Board Diagnostics NOTE: • Keep a new transducer on hand to use for test. • No display does not mean the sprayer is not pres-surized. Before repair, relieve pressure , page 7. 1. For sprayers with digital display, see Digital Display Messages. 2. Remov...

Pressure Control Repair 28 309674M Pressure Control Transducer Removal 1. Relieve pressure , page 7. 2. Remove screws (12) and cover (50). 3. Disconnect transducer lead from motor control board (49). 4. Slide transducer grommet (20) out of control box (48). 5. Remove pressure control transducer (38)...

Motor Replacement 309674M 29 Motor Replacement Ultra, Nova, and ST Max 395/495/595 Models Only Removal 1. Relieve pressure , page 7. 2. Remove pump (41); Displacement Pump Replace- ment , page 15 3. Remove drive housing (42); Drive Housing Replacement , page 17. 4. Remove screws (12) from cover (50)...

Technical Data 309674M 31 Technical Data Basic Sprayer Wetted Parts: zinc-plated carbon steel, nylon, stainless steel, PTFE, acetal, chrome plating, leather, UHMWPE, aluminum, tungsten carbide Noise Level: Sound power . . . . . . . . . . 100 dBa* Sound pressure . . . . . . . . . 90 dBa* *Measured 3 ...

Graco Standard Warranty 32 309674M 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 to the original purchaser for use. With the exception of any...