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Mech anic al Adju stme nt
The disk does not have to be in the exact center of either air gap for the relay to perform correc tly .
Should the disk not clear all gaps , the following adjustment can be made.
l .
Determine which way the disk must be aligned to clear all gap surfac es by 0 . 0 10 inch .
Remove the drag magnet assembly by loosening the two screws securing it to the support structure .
2 .
need
The screws
Loosen the upper pivot bearing set screw (l/ 16 inch hex wrench) slightly, s o the upper pivot can
3 .
move freely .
4 .
Loosen the jewel bearing set screw as in 3 above.
Apply a slight downward finger pressure on the upper pivot and turn the jewel bearing screw, from
5 .
the underside of the support structure, to position the disk as determined in 1 above.
6 .
Turn the jewel bearing screw 1/8 turn clockwise and tighten the upper pivot set screw to 2 . 5 - 3.5
inch pounds of torque.
7.
Turn the jewel bearing screw 1/8 turn counterclockwise .
assembly approximately 0 . 005 inch and permit proper end -play.
of end -play .
8 .
Tighten the jewel
9.
Rotate the disk through the electromagnet gap.
inch and be within 0 . 005 inch flatness .
should be replaced.
Reinstall the drag magnet assembly and check that the disk has at least 0 . 0 10 inch clearance from
10 .
the drag magnet assembly surfaces .
1 1.
Tighten the drag magnet assembly mounting screws with 7 - 10 inch pounds of torque, after securely
seating thL: assembly and positioning it according to the TIME T E ST above.
HI- SEISMIC INSTANTANEOUS U NIT AND HIGH
1 .
Both contacts should close at the same time .
2.
The backing strip should be so formed that the forked and (front) bears against the molded strip
under the armature .
3 .
With the armature against the pole piece, the eros::. member of the "T" spring should be in a
horizontal plane and there should be at least 1/6 4" inch wipe on the contacts .
inserting a 0 . 0 10 inch feeler gage between front half of the shaded pole with the armature held
closed. Contacts should close with feeler gage in place .
4.
Since mechanical adjustments may affect the Seismic Fragility Le vel, it is advised that no
m�chanical adjustments be made if seismic capability is of concern .
HI- SEISMIC TARGET AND SEAL -IN UNIT
Check l and 2 as described under INSTANTANEOUS UNIT .
To check the wipe of the seal-in unit, insert a 0.0 10 inch feeler gage between the plastic residual of
armature and the pole piece with the armature held closed .
Since mechanical adjustments may affect the Seismic Fragility Level, it is advised that no mechanical
adjustments be made if seismic capability is of concern.
not be removed .
Do not remove the set screw from the support structure.
bearing set screw to 2 . 5 - 3.5 inch pounds of torque.
DROP OUT INSTANTANEOUS U N I T
GEK-45376
This will lower the disk and shaft
The shaft must have 0 . 005 -0.0 10 inch
The disk should clear the gap surfaces by 0 . 010
If the disk is not within 0.005 inch flatness the disk
Contacts should close with feeler gage in place .
15
Check this by
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