M160 Internet Router Hardware Guide
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wris t and
connect the strap toone of the ESD points on the chassis. Make sure the router
is attached to a proper earth ground. For more information about ESD, see
“Preventing ElectrostaticDischarge Damage” on page 226.
2. Orient the impeller so that the label is on the top. Align the rails on the upper
edges of the impeller assembly with the guides inside the chassis.
3. Pushtheimpellerassemblyupandtotherighttostartitintothechassis,
then slide it all the way in.
4. Tighten the thumbscrewat each corner of the impeller cover.
Figure 76: Installing the Rear Lower Impeller Assembly
1915
Rails
Guides
Label
The rear upper impeller assemblyis located at the upper left of the rear of the
chassis, as shownin Figure 2. It weighs about 4 lb (1.8 kg).
The assemblyis hot-removable and hot-insertable,as described in Field-Replaceable
Units (FRUs) on page 4. To replace it, perform thefollowing procedures:
Removing the RearUpper Impeller Assembly on page 157
Installing the Rear UpperImpeller Assembly on page 158
156 Replacing Cooling System Components