ITT HT 3196 i-FRAME, Installation, Operation And Maintenance Manual

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Gaskets, O-rings, and seats replacement
• Replace all gaskets and O-rings at each overhaul and disassembly.
• Inspect the seats. They must be smooth and free of physical defects.
In order to repair worn seats, skin cut them in a lathe while you maintain dimensional relationships
with other surfaces.
• Replace parts if the seats are defective.
Shaft and sleeve replacement guidelines
Two types of sleeves
The 3198 is offered with either a metallic sleeve that uses the standard 3196 shaft or a Teflon sleeve. The
Teflon sleeve requires a special shaft and a different inboard labyrinth oil seal.
Shaft measurements check
Replace the shaft (122) if any measurements exceed acceptable values. See Bearing fits and tolerances.
122
Straightness check
Replace the shaft (122) if runout exceeds the values in this table:
Table 12: Shaft runout tolerances for sleeve fit and coupling fit
Sleeve fit in inches
(millimeters)
Coupling fit in inches
(millimeters)
With sleeve 0.001 (0.025) 0.001 (0.025)
Without sleeve 0.002 (0.051) 0.001 (0.025)
Shaft and sleeve check
126
• Check the shaft and sleeve (126) surface for grooves and pitting.
• Replace the shaft and sleeve if any grooves or pits are found.
Bearing-frame inspection
Checklist
Check the bearing frame for these conditions:
• Visually inspect the bearing frame and frame foot for cracks.
• Check the inside surfaces of the frame for rust, scale, or debris. Remove all loose and foreign material.
• Make sure that all lubrication passages are clear.
• If the frame has been exposed to pumped fluid, inspect the frame for corrosion or pitting.
• Inspect the inboard-bearing bores.
If any bores are outside the measurements in the Bearing fits and tolerances table, replace the bearing
frame.
Maintenance
Model HT 3196 i-FRAME Installation, Operation, and Maintenance Manual 85