33 Typing Unit

This document provides technical instructions for the disassembly and reassembly of the Teletype Corporation 33 Typing Unit. It includes safety precautions, such as disconnecting power before service and handling retaining rings with care to prevent loss. The guide outlines step-by-step procedures for removing major components, including:

• Ribbon Mechanism: Removing the ribbon, spools, and mounting screws.
• Carriage Mechanism: Disengaging the carriage return spring, spacing belt, and carriage shaft.
• Carriage Drive Bail: Removing the clamp plates and mounting screws.
• Codebar Mechanism: Extracting the mechanism and associated blocking levers.
• Codebar Reset Bail: Removing spring attachments and bearings from the base casting.
• Spacing Pawl Mechanism: Detaching springs and links.
• Function Lever Mechanism: Adjusting the pivot shaft and removing individual levers.
• Spacing Drum Mechanism: Removing the drum, nut, and shaft.

The manual emphasizes that most mechanisms are secured with self-tapping screws that should be loosened rather than removed unless otherwise noted. It also provides reference illustrations for identifying parts and their locations within the unit.