DE-STA-CO P1700 - Manual (Page 27)

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SECTION 8: Repair and Replace (continued)
NOTE: Worm must be dropped down before attempting to remove the gear.
8.3.1.1.2. Gear
8.4.1.1.2.1. Remove the worm as described above.
8.4.1.1.2.2. Record the distance from the finished face of the housing
to the unmarked face of the gear (see Figure 8).
8.4.1.1.2.3. Remove screw and washer retaining gear, if applicable.
8.4.1.1.2.4. Loosen the screw clamp on the split hub side of the gear.
8.4.1.1.2.5. Remove the gear. Tapped holes in the end of the gear hub
may be utilized in conjunction with a puller.
8.4.1.1.3. Component Replacement
NOTE: If both worm and gear were removed from the housing,
the gear must be replaced before the worm shaft is installed
8.4.1.1.3.1. The correct relationship of the worm and gear must be
maintained when reassembling the components. Regardless
of the actual position of the reducer unit on the roller gear
drive or Intermittor housing, you must imagine that the worm
is over the gear and that you are viewing the worm from the
single extension end (the end opposite of the splines on the
worm shaft) with the unmarked face of the gear to your right.
Maintain this relationship between components when
installing the gear on the roller gear camshaft.