Graco Drum Unloader TOF200A-2-A-1-P-6-2-B-E-1-Y-1

Material drum removed from the supply unit

Ram plate is down and the ram hand valve is in the OFF position

Main electrical disconnect switch turned OFF

Front and right side pump cover removed

Sensor removed from the ram plate

Two sensor wires disconnected from the J1 or J2 of PCB201

Leads from the new sensor attached to the leads of the old sensor and pulled into the main control panel

New sensor installed into the follower/tire plate after coating with non-silicone heat sink compound

Two wires from the new sensor connected to the J1 or J2 of PCB201

Warning: Follow all safety procedures and lockout rules during this procedure.

Material drum removed from the supply unit?

Is the ram plate down and the ram hand valve in the neutral position?

Excess material and pressure in the system bled off?

System heat turned off on the electrical control panel?

Main electrical power supply to the unit turned OFF?

Main electrical disconnect turned OFF?

All material hoses disconnected?

Pump sheet metal enclosure removed?

Module heaters and sensor can be serviced without removing the pump module from the supply unit. Remove the front shrouds. When finished servicing the pump module re-attach shrouds.

This procedure can be done when the Therm-O-Flow 200 is cool.

1. Remove the screws that hold the front shroud in place and remove the front shroud.

2. Disconnect the electrical wires from heater band (3). See FIG. 25.

3. Remove the screw that holds the heater band in place.

4. Remove the heater band from pump.

5. Coat the inside of the heater with non silicone heat sink compound before mounting. Maximum thickness is 0.005”. Coat only to within 3/4” of vertical ends.

6. Install a new heater band in the same location as the old heater band: