Hitachi CM 75EAP Service Manual page 7

Is there abnormal
vibration?
Yes
No
Does the cut-off wheel
rotate?
No
Yes
Is water supplied from the
water supplier?
No
Improper mounting of cut-off wheel
Loose tightening of handle and other parts
Bent or broken cut-off wheel
Loose belt
High belt tension
Belt disengaged from pulley
Poor connection of joint with faucet
Clogged joint
Hose of 14 mm or less in bore
-6-
Mount it adequately.
Firmly tighten the
loose parts.
Replace.
Adjust belt tension.
Adjust belt tension.
Engage adequately.
Connect.
Clean.
Replace.