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Annual Inspection
No.
Item
Capacitor rush current
1
preventive contactor
2
Smoothing capacitor
3
Brake disk thickness
4
DC electromagnet
Inside of the hoisting
5
gear case
6
Overhaul
Hoisting motor shaft
7
and spline serration
part
The inspection results shall be stored for three (3) years.
* Before providing maintenance services, please consult the nearest office of Mitsubishi Electric
Hoist Corporation.
Schedule
Annually
Disassemble the contactor, and then check the contact for wear. If
Every 6 months if rush
the inner mechanism is damaged or worn out, replace the contactor.
current flows frequently
Check the capacitor for liquid leakage and bulge. Also check that
Same as above.
the safety valve is not activated.
Remove the lid on the bottom of the brake casing, and check the
thickness. If the brake disk thickness is near the following value,
replace.
*
the supplied power is the minimum.
For a detailed description of the replacement standards, refer to
"Maintenance and Inspection of Brake".
Hoisting brake
Every year
Every 6 months if the
Traversing brake disk thickness
frequency of uses is high.
Every 3 months if the
no-load high-speed
function is used
Prior to the thickness check, check the engagement between the
brake disk teeth and the motor shaft or the brake gear for
abnormalities (wear and backlash).
Remove the stationary core, and disassemble the parts. After that,
Every year
check the movable parts for wear and backlash. At the completion
Every 6 months if the
of check, lubricate each part.
frequency of uses is high.
Check operation of the automatic adjustment mechanism, and record
the operation.
Open the bracket on the end face, and check the gears, shafts and
Every year
bearings for abnormalities (wear and backlash). Change the oil.
Every 2 years
Lower the hoist from the I-beam, disassemble it, and check the parts
Every year when the
and the traversing rail.
frequency of uses is high
or when the hoist is on an
important line
Every year
Remove the electromagnet casing, disassemble the parts, and check
Every 6 months if the
the engagement between the hoisting motor shaft and the brake gear
frequency of uses is high.
(wear and backlash).
Description
These values are reference values that enable suction even if
5t 、 10t 7.8 mm (New disk
5 t
5.5 mm (New disk
10t
7.0 mm (New disk
- 36 -
8.3 mm thick)
8 mm thick)
8 mm thick)
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