Sumitomo SM-HYPONIC Hypoid User Manual

15
BRAKE MOTOR (cont.)
Problem Possible Cause Corrective Action
Groans Overcurrent Rotor and
Repair by winding or replacing stator assembly.
Overheating stator touching
One phase of
Overcurrent stator coil Replace the stator winding.
shorted
Makes a high
pitched
Faulty bearing Replace the bearing.
metallic
noise
Switch
Insufficient switch capacity Replace with one having the rated capacity.
overheats
Overload Drop to the rated load.
Fuse blows Insufficient fuse capacity Replace with one having the rated capacity.
Overheats
Overload Drop to the rated load.
Voltage drop Consult with the power company.
Voltage drop Consult with the power company.
Overload Drop to the rated load.
Stops Bearing damaged by overheat Replace the bearing.
Improper adjustment after
Adjust again.
reassembly
Not wired for fast action Wire for fast action.
Foreign matter entrapped in Remove foreign matter and take preventive action. Wipe lining
brake lining. Oil on lining surface surface with a dry cloth.
Worn brake lining Adjust brake gap or replace lining.
Uneven brake gap Adjust evenly.
Excessive load Decrease load or use larger brake.
Faulty electric circuit Check circuit.
Blow fuse Replace fuse.
Only single phase available from
Measure power supply voltage and check for defective circuit.
three phase power supply
Protective device has tripped Eliminate cause and reset.
Damaged or burned motor
Repair or replace.
winding
Rust on brake friction surface Clean brake (lining).
Gap needs adjustment Readjust gap.
Burned bearing Replace.
Overload Check and troubleshoot load and safety device.
Foreign material inside the
Examine inside brakemotor and remove foreign material.
brakemotor.
Damaged bearing Replace.
Worn brake lining Adjust brake gap or replace lining.
Hub leaf spring is off or damaged Replace.
Burned solenoid coil Replace.
Damaged rectifier Replace.
Voltage drop Raise voltage to rated level.
Overload Reduce the load or oversize the brakemotor.
Improper protective device
Adjust protective device.
setting
Table 20 Quick Troubleshooting Guide (cont.)
Rotates with
the load dis-
connected, but:
(cont.)
Rotates
when the
load is dis-
connected
but when
the load is
connected:
Speed
suddenly
drops
Brake fails to operate
Brake slips
(Braking time is too long)
Rotor fails to turn
Abnormal noise
Trouble under loaded
condition

Sumitomo SM-HYPONIC Hypoid Specifications

General

Brand	Sumitomo
Model	SM-HYPONIC Hypoid
Category	Engine
Language	English