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Rockwell Automation Publication 1512A-UM101B-EN-P - December 2021
Chapter 5 Maintenance
Figure 45 - Isolation Switch Handle Adjustments
To Reduce the Gap Distance
1. Loosen the two screws in the stop bracket and move the stop bracket up
against the interlock lever.
2. With the feeler gauge positioned in the gap, move the interlock lever and
the stop bracket closer to the isolation switch operating lever to reduce
the gap space.
3. Tighten the 1/4-20 in. stop bracket screws (12 lb•ft [15 N•m]).
4. Tighten the nyloc nut until it is snug against the contactor operating
lever. Do not overtighten the nyloc nut as it will move the operating lever
and reduce the gap.
To Increase the Gap Distance
1. Loosen the two screws in the stop bracket and move the stop bracket
away from the interlock lever.
2. Loosen the nyloc nut until the gap reaches the desired size.
3. Move the stop bracket until it just touches the interlock lever and tighten
the screws.
4. Apply Loctite 290 (or equivalent adhesive) to the 1/4-20 in. stop bracket
screws and torque the screws to 12 lb•ft (15 N•m).
5. Move the isolation switch handle to the ON position.
Isolation Switch
Operating Lever
Isolation Switch
Handle at halfway
position
Nyloc Nut
Contactor Interlock Lever
Contactor Interlock Rod
Stop Bracket
Switch Interlock Lever
Gap: 0.045...0.060 in.
(1.1...1.5 mm)
