Weight Reduction - IBM pseries 655 Installation Manual

Weight Reduction

Certain system configurations may include a rack that weighs in excess of 1136 kg (2500 lbs.) (doors
removed) as shipped from manufacturing. Some elevators have a weight restriction that prevents lifting
these systems. To reduce the weight of affected systems to less than 1136 kg (2500 lbs.), service
personnel must remove the integrated battery features (IBFs) and some processor subsystems and I/O
subsystems installed in the system rack. This weight reduction is only required for these systems when the
installation process requires the rack to be reduced temporarily to less than 1136 kg (2500 lbs.).
For instructions on removing and replacing the components, see Chapter 4, "Installation and Removal
Procedures," on page 39.
Configurations affected by this weight limitation consist of systems having the 7040 Model W42 frame with:
v Eight or more processor subsystems
v Three or more I/O subsystems
v Two or three IBFs
Recommended Order for Removing Components for Weight Reduction
The recommended order for removing components to reduce weight is as follows:
1. Remove all IBFs.
2. Remove processor subsystems or I/O subsystems, starting from the top position and working down the
rack.
Determine the Number of Components to Remove
Use the following tables to determine the number of IBFs or processor subsystems to remove to reduce
system weight to a maximum of 1136 kg (2500 lbs.).
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Chapter 2. Installing the pSeries 655