Graco Inc PT2000, 218938, 307-730, 223660 manual 82,81,80

WARNING

Pressure Relief Procedure

To reduce the risk of serious bodily injury, including injury from moving parts, or electric shock, always follow this procedure whenever you shut off the sys- tem, when checking or servicing any part of the sys- tem and whenever you stop painting.

1.Turn the ON/OFF switch to OFF.

2.Unplug the power supply cord.

3.Trigger the roller valve to relieve pressure.

If you suspect that pressure is not fully relieved after following the steps above, open the priming valve 2 turns counterclockwise.

WARNING

These repair procedures should be performed only by qualified repair person with an electrical back- ground, using the proper tools. Failure to do the pro- cedures correctly can result in electric shock, or oth- er serious injury and damage to the pump.

NOTE: For all electrical repair, follow the Pressure Re- lief Procedure W arning above. Then remove the base cover (42). Before checking or operat- ing the system, reinstall the base cover, making sure all wires are tucked in neatly.

Fuse (See Fig 10.)

1.Pull the old fuse out of the fuse holder (65). Install a new fuse (67). Be sure you install ONLY a 3AG fuse, rated at 1–1/4 amps.

Rectifier (See Fig 11.)

1.Disconnect the four leads from the rectifier.

2.Remove the screw (33) and rectifier (39).

3.Install a new rectifier so the positive terminal (+) is closest to the fuse holder (65). Install the screw (33).

4.Connect the power supply cord’s white lead to an un- marked terminal. Connect the pressure switch lead to the other unmarked terminal. Connect the black motor lead to the negative (–) terminal, and the red motor lead to the positive (+) terminal.

36		80
84		81
A
38		82
34		33
		25
39
65		33
	67	42
		43
37		33
Fig 10		0294

12307-730

ON/OFF Switch (See Fig 10 and 11.)

1.Disconnect the two leads from the ON/OFF switch (34) terminals. See Fig 11.

2.Remove the boot (36) and pull the switch (34) out of the base. Remove the ground wire (84). See Fig 10.

3.Remove the top nut (A) from the new switch. Place the ground wire connector (84) on the switch and re- install the nut. Install the new switch, aligning the tab in the base with the slot in the switch. See Fig 10. In- stall the boot.

4.Connect a pressure switch lead to the power-OUT terminal, and a jumper wire lead to the power-IN terminal. See Fig 11.

Power Supply Cord (See Fig 10 and 11.)

1.Disconnect the white lead from the rectifier (39), and the black lead from the fuse holder (65), and the green lead from the grounding screw (82).

2.From the inside of the base, use a screwdriver to push the strain relief bushing (38) out of the base. Remove the bushing and power supply cord.

3.Slide the strain relief bushing over the new power supply cord. Press the bushing together and then press the bushing into the base.

4.Connect the green ground wire to the grounding screw (82) and secure it with a washer (81) and nut (80). Connect the black lead to the fuse holder (65) and the white lead to an unmarked terminal on the rectifier (39).

WARNING

To maintain grounding continuity in your system, and to reduce the risk of electric shock, check to be sure the ground wires are properly connected. The power supply cord’s green ground wire connects to the screw (82), and the ground wire (84) connects between the ON/OFF switch and the screw (82). Also be sure the screws (25 and 33) are tightly screwed into the base. See Fig 10 and 11.

	84	39	PRESSURE
WHITE	34	33	SWITCH (2)
			LEADS
38
37
		OUT
		IN

MOTOR

LEADS

JUMPER

WIRE

GREEN	65	82,81,80
GROUND		33
WIRE	RED	25

Fig 11 0295