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Installation & Adjustment Procedures
Figure 19: Adjustable Arm Assembly
6.4.4. If the switch is fully open before the operator reaches the fully open position, the
adjustable arm radius is too long. To correct:
6.4.4.1. Check to see that nothing has slipped.
6.4.4.2. Return the switch to
almost
the closed position, but not toggled.
6.4.4.3. Match-mark the adjustable arm and the pipe clevis
6.4.4.4. Loosen the bolts on the adjustable arm and pipe clevis
6.4.4.5. Shorten the adjustable radius arm approximately ¼-inch. Allow the pipe
clevis to reposition itself the same ¼ inch. Refer to
6.4.4.6. Tighten bolts and test operate - readjust as necessary.
6.4.5. All poles of the fully adjusted disconnect switch should operate together although
a slight variance between poles is acceptable. The primary objective is for all
poles to fully open and fully close. Minor adjustments of the interphase pipe
clevises may be necessary for pole coordination.
6.5. Final Check:
6.5.1. Once all final adjustments are complete, be sure that all nuts are tightened to
their specified torque (refer to
on page 3).
6.5.2. Tighten piercing bolt until it pierces the pipe wall. For heavy walled pipe,
(schedule 80 or above, 3 inch or above) pre-drill the threader bolt (piercing screw)
holes with a threader drill guide (provided) and a ¼ inch drill bit. Tighten until
there is pressure. Do not tighten bolt the entire length of the bolt.