Fusion F300S, F300SQ Figure 29. Magnetron Fastener Tightening Sequence (I300M)

5.Reconnect the filament transformer wires to the magnetron and tighten the terminal screws to 0.9 N-m (8 inch-lbs) using a torque-limiting screwdriver. Reposition the tubing over the terminal screws and install cable ties.

6.Install the irradiator housing as described in “I300M Irradiator Housing Removal/Replacement” on page 86.

Magnetron Removal/Replacement

1.Remove the irradiator housing as described previously.

2.Disconnect filament transformer wires from magnetron by removing the cable ties and sliding back the tubing. Remove the terminal screws.

3.Remove the filament transformer bracket and air plenum.

4.Remove the four screws fastening the magnetron to the casting. Lift the magnetron off the waveguide assembly and place it upside down in a clear area on a wooden bench, at least five inches from any magnetic materials (such as iron or steel).

5.Install the replacement magnetron and fasten it to the casting using the associated hardware.

6.Refer to Figure 29; hand tighten the magnetron fasteners in sequence as shown until snug. Then, tighten the fasteners ¼ turn in sequence. Finally, tighten the fasteners in sequence to 3.4 N-m (30 inch-lbs) using a torque-controlled driver.

Figure 29. Magnetron Fastener Tightening Sequence (I300M)

7.Install the filament transformer bracket and air plenum.

8.Reconnect the filament transformer wires to the magnetron and tighten the terminal screws to 0.9 N-m (8 inch-lbs) using a torque-limiting screwdriver. Reposition the tubing over the terminal screws and install cable ties.

9.Install the irradiator housing as described in “I300M Irradiator Housing Removal/Replacement” on page 86.

Installation, Operation, and Maintenance Manual # 509252 Rev R 89