307671D ULTRA 400 AIRLESS PAINT SPRAYER - Graco Inc.

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ON/OFF SWITCH REPLACEMENT (See Figs 14 Et 15) WARNING Before doing this procedure, follow the Pressure Relief Procedure Warning on page 17 to reduce the risk of a fluid injection injury, splashing in the eyes or on the skin, injury from moving parts, or electric shock. 1. Remove the pressure control cover and screws. 2. Remove the wires attached to the switch (302) at TPl and TP2, using a screwdriver. See page 22, Fig 21. 3. Use a 16 mm socket wrench to loosen and remove the nut and rubber boot (303) from the top of the pressure control box. Remove the switch guard (304). 4. Remove the ONIOFF switch. 5. Remove the wires attached to the switch TP4 and TP3 using a screwdriver. See page 22, Fig 21. 6. Attach the wires to TP4 and TP3 of the new switch. 7. Install the new switch so the internal tab of the antirotation ring (W) engages with the vertical groove in the threads of the switch, and the external tab engages with the blind hole (D) of the pressure control box. 8. Install the switch guard (304). aligning the internal tab with the groove in the threads. 9. Powder the inside of the rubber boot (303) with talcum, then shake excess out of boot. 10. Install the nut and rubber boot and tighten. 11. Reconnect the wires to TP1 and TP2. 12. Reinstall the pressure control cover and screws. Fig 14 MICROSWITCH REPLACEMENT (See Fig 15) Before doing this procedure, follow the Pressure Relief Procedure Warning on page 17 to reduce the risk of a fluid injection injury, splashing in the eyes or on the skin, injury from moving parts, or 1. Remove the pressure control cover and screws. 2. Disconnect both wires from the microswitch (3061. 3. Use the socket wrench to remove the nuts from the microswitch. 4. Check to see if the flag (X) is loose. If it is, be sure the fluid pressure is 0 bar (0 psi), then loosen the two 6 mm hex nuts behind the microswitch. Adjust the distance from the top of the flat to top inside of the pressure control box to 40.79k 0.254 mm (1.606* 0.010 in.). Tighten the screwsand recheck the dimension. Refer to Fig 1. 5. Perform the STALL PRESSURE CALIBRATION on page 24 before regular operation of the sprayer. 6. Reinstall the cover and screws. Fig 15 307-671 19
~ ~~~ ~~ ~~ ~~ BRIDGE RECTIFIER REPLACEMENT (See Fig 161 WARNING 1 Before doing this procedure, follow the Pressure Relief Procedure Warning on page 17 to reduce the risk of a fluid injection injury, splashing in the eyes or on the skin, injury from moving parts or electric shock. . CAUTION The lockwashers (333) must be in front of the bridge to avoid overheating which will result in bridge failure. Refer to the Detail in Fig 16. 6. Make sure the bridge is flush with the side of the box and tighten the screws securely. 1. Remove the pressure control cover and screws. 7. Connect all wires. Carefully route the wires. 2. Disconnect all wires from the bridge ( 3081 at the appropriate terminals. I- CAUTION 3. Outside the pressure control box on the right side are Be sure the flat blade of the insulated male contwo screws (331). Loosen, but don't remove the nector is centered in the wrap-around blade of the screw near the back mounting plate (50). Then female connector when the connections are loosen and remove the front screw. Slide the bridge made. Improper connections may cause the out. sprayer to malfunction. 4. Slide the new bridge (308) into the box being sure the lockwasher (333) on the rear screw (331) is /N FRONT of the bridge. Refer to the Detail in Fig 16. 5. Install the front screw, lockwasher and nut (332). Ro'ute all wires carefully to avoid interference with the movement of the bourdon tube, circuit board, or control box cover which could cause a malfunc- 8. Reinstall the pressure control cover and screws. BRIDCE INSTALLATION DETAIL Fig 16 20 307-671
Page 1 and 2: INSTRUCTIONS/PARTS LIST e 507-671 T
Page 3 and 4: ~~ ~ HIGH PRESSURE SPRAY CAN CAUSE
Page 5 and 6: Your new Ultra" 400 Sprayer functio
Page 7 and 8: OPERATION WARNING Pressure Relief P
Page 9 and 10: FLUSHING GUIDELINES When to Flush 1
Page 11 and 12: ~~~~~~ TYPE OF PROBLEM MOTOR WON7 O
Page 13 and 14: ~~ TYPE OF PROBLEM WHAT TO CHECK If
Page 15 and 16: TYPE OF PROBLEM ELECTRICAL SHORT WH
Page 17 and 18: BRIDGE TEST Remove the bridge from
Page 19: POWER SUPPLY CORD REPLACEMENT (See
Page 23 and 24: Step 2 is essential to reduce the r
Page 25 and 26: ~ ~~ STALL PRESSURE CALIBRATION I I
Page 27 and 28: 19. Install the connecting rod (9).
Page 29 and 30: MOTOR CAPACITOR REPLACEMENT (See Fi
Page 31 and 32: 13. Use a plastic mallet to gently
Page 33 and 34: PARTS DRAWING Model 230-963 Ultra"
Page 35 and 36: Ref No. 40 PRESSURE CONTROL ASSEMBL
Page 37: ULTRA@ 400 TECHNICAL DATA Power Req

307671D ULTRA 400 AIRLESS PAINT SPRAYER - Graco Inc.

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