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Annual Inspection
No. Item
Schedule
Description
1
Capacitor rush current
preventive contactor
Annually
Every 6 months if rush
current flows frequently
Disassemble the contactor, and then check the contact for wear. If
the inner mechanism is damaged or worn out, replace the contactor.
2
Smoothing capacitor
Same as above.
Check the capacitor for liquid leakage and bulge. Also check that
the safety valve is not activated.
3
Brake disk thickness
Every year
Every 6 months if the
frequency of uses is high.
Every 3 months if the
no-load high-speed
function is used
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.
*
These values are reference values that enable suction even if
the supplied power is the minimum.
For a detailed description of the replacement standards, refer to
“Maintenance and Inspection of Brake”.
Hoisting brake
5t
、
10t 7.8 mm (New disk
8.3 mm thick)
Traversing brake disk thickness
5 t
5.5 mm (New disk
8 mm thick)
10t
7.0 mm (New disk
8 mm thick)
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).
4
DC electromagnet
Every year
Every 6 months if the
frequency of uses is high.
Remove the stationary core, and disassemble the parts. After that,
check the movable parts for wear and backlash. At the completion
of check, lubricate each part.
Check operation of the automatic adjustment mechanism, and record
the operation.
5
Inside of the hoisting
gear case
Every year
Open the bracket on the end face, and check the gears, shafts and
bearings for abnormalities (wear and backlash). Change the oil.
6
Overhaul
Every 2 years
Every year when the
frequency of uses is high
or when the hoist is on an
important line
Lower the hoist from the I-beam, disassemble it, and check the parts
and the traversing rail.
7
Hoisting motor shaft
and spline serration
part
Every year
Every 6 months if the
frequency of uses is high.
Remove the electromagnet casing, disassemble the parts, and check
the engagement between the hoisting motor shaft and the brake gear
(wear and backlash).
The inspection results shall be stored for three (3) years.
* Before providing maintenance services, please consult the nearest office of Mitsubishi Electric
Hoist Corporation.
Summary of Contents for UM 10t
Page 51: ... 47 Structural Drawing of Hoist Main Body 5t 10t PA00531 ...
Page 52: ... 48 Structural Drawing of Electric Traversing Unit Monorail Type 10t P288922 ...
Page 53: ... 49 Structural Drawing of Electric Traversing Unit Double rail type 5t PA00483 ...
Page 54: ... 50 Structural Drawing of Traversing Mortor Double rail type 10t P276926 ...
Page 55: ... 51 Structural Drawing of Hook Block 5t PG49975 ...
Page 56: ... 52 Structural Drawing of Hook Block 10t PG49976 ...