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REPAIR
KEEP FOR REFERENCE.
Read this and all related manuals for
important warnings and instructions.
INSTRUCTIONS
295STt
Airless Paint Sprayers
3000 psi (207 bar, 20.7 MPa ) Maximum Working Pressure
120 VAC
Model 233686, A, B, C (Stand)
Model 233823, A, B (Hi-boy)
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GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440-1441
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ECOPYRIGHT 2001, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
First choice when
quality counts.t
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309386
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309054
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Graco Warranty
309387
233686
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309385
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Rev. C
ti1872a
309053
309055
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Table of Contents
Related Manuals for Graco 295ST 233686
Summary of Contents for Graco 295ST 233686
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Page 1: Table Of Contents
....... GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441 ECOPYRIGHT 2001, GRACO INC. Graco Inc. is registered to I.S. EN ISO 9001... - Page 2 WARNING ADVERTÊNCIA Poderá ocorrer incêndio e explosão quando for pulverizado ou injetado Fire and explosion hazard: Solvent and paint fumes can ignite or líquido inflamável numa área onde houver má circulação de ar; vapores explode. inflamáveis poderão incendiar-se a partir de uma chama ou fagulhas a To help prevent a fire and explosion: descoberto.
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Page 3: Component Function And Identification
Component Identification and Function ti1872a Fig. 1 Motor DC motor, permanent magnet, fan cooled Drive Assembly Transfers power from DC motor to displacement pump Displacement Pump Transfers fluid to be sprayed from source through spray gun Fluid Outlet Spray gun is connected here Prime Valve Used to prime and drain sprayer (also relieves fluid outlet pressure) when open... -
Page 4: General Repair Information
General Repair Information Pressure Relief Procedure 1. Keep all screws, nuts, washers, gaskets, and electrical fittings removed during repair proce- dures. These parts are not normally provided with WARNING replacement assemblies. INJECTION HAZARD WARNING System pressure must be manually relieved to prevent system from starting ELECTRIC SHOCK HAZARD or spraying accidentally. -
Page 5: Grounding
Grounding WARNING Improper installation or alteration of grounding plug Grounding Plug Grounded results in risk of electric shock, fire or explosion Outlets that could cause serious injury or death. 1. All models require 60 Hz, 15A circuit with a 120 Vac grounding receptacle. - Page 6 Troubleshooting MOTOR WON’T OPERATE (Continued) TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK refer to this column Basic Electrical Problems 5. That motor leads are securely fastened and 5.
- Page 7 Troubleshooting LOW OR FLUCTUATING OUTPUT WHAT TO CHECK WHAT TO DO TYPE OF PROBLEM If check is OK, go to next check When check is not OK refer to this column Low Output 1. For worn spray tip. 1. Follow Pressure Relief Procedure Warn- ing, then replace tip.
- Page 8 Troubleshooting LOW OR FLUCTUATING OUTPUT TYPE OF PROBLEM WHAT TO CHECK WHAT TO DO If check is OK, go to next check When check is not OK refer to this column Motor runs and pump strokes 1. Paint supply. 1. Refill and reprime pump. 2.
- Page 9 Troubleshooting MOTOR IS HOT AND RUNS INTERMITTENTLY WHAT TO CHECK WHAT TO DO TYPE OF PROBLEM If check is OK, go to next check When check is not OK refer to this column Motor is hot and runs intermit- 1. Determine if sprayer was operated at high 1.
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Page 10: Spin Test
Spin Test Setup Armature, Brushes, and Motor Wiring Open Circuit Test (Continuity) 1. Connect red and black motor leads together with Electric Shock Hazard; page 4. test lead. Turn motor fan by hand at about two revolutions per second. 2. If uneven or no resistance, check for: broken brush To check armature, motor winding and brush electrical springs, brush leads, motor leads;... - Page 11 Motor Brush Replacement 6. Fig. 5. Insert brush (B). Push clip (A) until it snaps 8. Inspect commutator for excessive pitting, burning into place and secures brush. or gouging. A black color on commutator is normal. Have commutator resurfaced by a motor repair shop if brushes wear too fast.
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Page 12: On/Off Switch Replacement
On/Off Switch Replacement Removal Installation 1. Install new ON/OFF switch (23). Install locking ring Relieve pressure; page 4. (24) and toggle boot (25). 2. Fig. 6. Remove four screws (18) and pressure control cover (39). 2. Connect two wires (A) to ON/OFF switch. 3. - Page 13 On/Off Switch Replacement Wiring Diagram (Capacitor on Motor) ON/OFF 233686, A Switch L2 L1 233686, B 233823, A Power Plug Black Pressure Transducer White Green Yellow from Motor Potentiometer Red (+) Black (–) Capacitor TI0060 Wiring Diagram ON/OFF (Capacitor on Board) Switch 233686, C White...
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Page 14: Pressure Control Repair
Pressure Control Repair Motor Control Board Diagnostics Note: Keep a new transducer on hand to use for test. 1. Remove four screws (18) and cover (39). Fig. 6. 2. Turn ON/OFF switch ON. CAUTION 3. Observe LED operation and reference following table: Do not allow sprayer to develop fluid pressure with- out transducer installed. - Page 15 Pressure Control Repair Motor Control Board Removal Installation Refer to Fig. 6 and 7. 1. Clean pad on rear of motor control board. Apply small amount of thermal compound 073019 to pad. 2. Fig. 6 and 7. Install motor control board (35) with Relieve pressure;...
- Page 16 Pressure Control Repair Pressure Control Transducer Pressure Adjust Potentiometer Removal Removal Refer to Fig. 6 and 7. Refer to Fig. 6 and 7. Relieve pressure; page 4. Relieve pressure; page 4. 2. Remove four screws (18) and cover (39). 2. Remove four screws (18) and cover (39). 3.
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Page 17: Drive Housing Replacement
Drive Housing Replacement 5. Remove two back screws (22). CAUTION 6. Pull drive housing (10) off of motor (1). Do not drop gear cluster (7) when removing drive housing (10). Gear cluster may stay engaged in Assembly motor front end bell or drive housing. 1. -
Page 18: Motor Replacement
Motor Replacement Disassembly 6. Remove strain relief (37; Fig. 6) and motor fan (2). 7. Remove three screws (22) behind board and remove control housing (21). Relieve pressure; page 4. 8. Remove four screws (22) and motor (1) from frame (63). 2. -
Page 19: Displacement Pump Replacement
1. Fig. 12. Extend pump piston rod fully. Apply grease to top of pump rod at (A) or inside connecting rod. 9576A Fig. 13 7. Fig. 14. Fill packing nut with Graco TSL until fluid flows onto top of seal. 9575A Fig. 12 9577A Fig. -
Page 20: Technical Data
Technical Data 100–120V, ∅, A, Generator Motor HP (W) Cycles per gallon (li- Maximum Maximum Fluid Outlet Minimum W ter) Delivery gpm Tip size npsm (lpm) 1, 15, 50/60 3000 7/8 (653) 680 (180) 0.38 (1.25) 0.019 1/4 in. Basic Sprayer Wetted Parts: ......zinc-plated carbon steel, polyurethane, polyethylene, stainless steel, Teflon , Delrin... - Page 21 Notes 309387...
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Page 22: Graco Phone Number
Graco distributor to 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.