IBM 6400-I15 Maintenance Manual - Page 252
Extension Spring, Put a dab of IBM #20 bearing lubricant on both spring lugs.
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Page 252 highlights
Spring, Extension ATTENTION Do not let the hammer bank rotate toward the platen during spring replacement. Removal 1. Prepare the printer for maintenance (page 194). 2. Open the printer cover. 3. Remove the shuttle cover assembly (page 209). 4. Unhook the extension spring from the spring lugs on the hammer bank and shuttle frame. (See Figure 47, page 279.) Installation 1. Put a dab of IBM #20 bearing lubricant on both spring lugs. ATTENTION Make sure the extension spring does not touch the MPU cable after installation. 2. Hook the extension spring over the spring lugs. (See Figure 47, page 279.) 3. Install the shuttle cover assembly (page 209). 4. Return the printer to normal operation (page 159). 252 Replacement Procedures and Illustrated Parts List
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