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Improper mounting of cut-off wheel
Mount it adequately.
Loose tightening of handle and other parts
Firmly tighten the
loose parts.
Bent or broken cut-off wheel
Replace.
Loose belt
Adjust belt tension.
High belt tension
Adjust belt tension.
Belt disengaged from pulley
Engage adequately.
Poor connection of joint with faucet
Connect.
Clogged joint
Clean.
Hose of 14 mm or less in bore
Replace.
Is there abnormal
vibration?
Is water supplied from the
water supplier?
Does the cut-off wheel
rotate?
No
Yes
Yes
No
No