Pacific Hoists PEH050NH Operation Manual page 24

Method of adjusting
4. Apply with thickness gauge when
adjusting the gap.
At least 3- 4 measuring points.
5. Gap value : about 0.3~0.4mm.
5. Make sure all measuring points reach gap
value. Then tighten the ○ 1 set screw.
6. Check the gap again. If there is an error,
re-adjust again.
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Figure