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Inspection and Maintenance — GEK 107048
5. Apply a thin film of anti-seize compound to the bolts, install bolting and torque the horizontal
joint.
6. Check the outside diameter of the upper and lower half casings at the horizontal joint to insure
that the mating joints do not have a step greater than 0.0015 in.
7. Using a piece of 0.0015 in. feeler check the aft end inner bore horizontal joint at the rabbet fit.
This joint fit should not exceed 0.0015 in.
Operation 4 — How to Install Compressor Discharge and Aft Compressor Casings
Note: Later vintage units do not have an aft compressor casing, it has been
combined as a one piece casing with the forward compressor casing. If
the unit does have an aft compressor casing it can be installed along
with the compressor discharge casing as a single unit.
1. Clean and deburr all mating joints.
2. Rig to lift the compressor discharge and aft compressor casing. Install the guide pins. See Figure
MI-R.1.
3. Apply joint compound on the surface of the horizontal joints only, and only for a distance of one
inch on both sides of the four way joint. Do not apply joint compound to the vertical joint. Refer
to Section 2, Standard Practices, solvents, sealers and cleaners in this Service Manual.
4. Carefully lower the casing into position on the lower half casings using the guide pins installed.
5. Apply anti-seize compound to all bolting.
6. Remove guide pins and install bolting to the horizontal joints.
7. Tighten the horizontal joint bolts starting at the mid point of the horizontal joints. Torque the bolt-
ing working alternately left and right, forward and aft until all bolting on the horizontal joints are
tight. See Figure MI-R.2.
8. Install the vertical joint bolts between the inner compressor discharge case and the compressor
discharge case. Tighten and torque the bolts starting at the vertical centerline and alternately
working toward the horizontal joint.
Operation 5 — How to Install Upper Half First Stage Nozzle Support Ring
1. Clean and deburr the mating joints.
2. Apply a light coating of anti-seize compound to the horizontal joint dowels and the horizontal
and vertical joint bolts.
3. Rig and lift the first-stage nozzle support ring and and lower into position on the lower half.
4. Assemble the support ring locating shim.
5. Install all horizontal and vertical bolting. Tighten and torque bolting.
Major Inspection — Reassembly Procedures
MI-R-3
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