Major Inspection — Disassembly ProceduresInspection and Maintenance — GEK 107048
MI-D-11
CAUTION
The forward compressor upper half casing weighs ap-
proximately 1775 pounds. The combined one piece upper
half casing (forward and aft) weighs 3100 pounds.
Operation 10 — How to Remove Upper Half Inlet Casing
1. Disconnect the wiring to the magnetic pickup located in the inlet and number one bearing area.
2. Unbolt and remove the magnetic pickup ring from the front of the inlet and number one bearing.
3. Remove upper half inlet casing horizontal joint bolting.
CAUTION
There are twelve point bolts located in the air passage of
the inlet casing which must be removed. See Figure
MI-D.3.
4. Remove the horizontal flange body bound bolts located on the forward inlet casing bellmouth.
5. Adjust the inlet guide vane control ring support plate bolts so that the lower half inlet guide vane
control ring does not drop. See Figure MI-D.4.
6. Unbolt the inlet guide vane control ring and secure to the upper half casing.
CAUTION
Do not lift the inlet casing by using the inlet flange spread-
er bars. These are dampening struts and are not to be used
for lifting attachments.
7. Rig lifting cables, chainfall and blocks as shown on the Weights and Center of Gravity drawing
in the Reference Drawing Section of this Service Manual to the upper half inlet casing.
CAUTION
The upper half inlet casing weighs approximately 5500
pounds.
8. Use the chainfall to initially lift the inlet casing, continue to lift the casing straight up and clear
of the unit. Use suitable blocking, stand the inlet casing in a vertical position.
9. Roll lower half rub ring around the shaft and remove.
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