Operator`s manual

3.2.4 Fans
Removal Procedures
Perform the steps in the following procedure to remove a fan:
1. Turn the main ON/OFF power switch to OFF and disconnect the
power cord from the wall receptacle.
2. Release the two captive fasteners on each side of the bezel that secure
the chassis to the cabinet rails.
3. Pull the chassis all the way forward on the slides.
4. Remove the two 10-32 hex nuts from the bottom of each of the
chassis mounting brackets (see Figure 2–5 for location of the chassis
mounting brackets).
WARNING
Use sufficient personnel and proper equipment when
lifting or moving the Rack-Mountable VAX 4000
Model 500 system. The fully loaded system weighs
53.5 kg (118 lb).
5. Lift the chassis straight up so that the eight 10-32 mounting studs
are clear of the equipment slides.
6. Carefully lower the chassis onto a flat and clear work surface. Block
the chassis, if necessary, to clear the mounting screws.
7. Release the two captive screws on the fan module assembly (see
Figure 3–6) and then grasp the handle and pull upwards.
8. Place the fan module assembly on a work surface with the fans
exposed (see Figure 3–6).
9. Remove the 6-32 hex nut securing the fan retaining bracket and
remove the bracket (see Figure 3–6).
10. Disconnect the power cord connector of the defective fan (see Fig-
ure 3–6).
11. Remove the fan by sliding the fan to the side to clear the two metal
retaining feet (see Figure 3–6).
3–12 Maintenance