Remove the Lower Impeller Assembly

The lower impeller assembly is located behind the craft interface at the front the chassis (see Figure 1). It weighs approximately 9 lb (4 kg).

To remove the lower impeller assembly, follow this procedure (see Figure 71):

1. Remove the air filter, if it is installed on the chassis. For instructions, see Remove the Air Filter.
2. Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
3. Unscrew the three screws at the bottom edge of the assembly, using a Phillips screwdriver if necessary.
4. Grasp the sides of the assembly, and slide it about halfway out of the chassis.
5. Move one of your hands underneath the assembly to support it, and slide it completely out of the chassis.

Figure 71: Remove the Lower Impeller Assembly