91
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Guidelines on the service life of contactor and its replacement
Replace the Contactor in accordance with the following rate of inching and the number of start. Replace the
Contactor every five years even if the number of start does not reach at the following.
Number of start to replace contactor
Rate of inching
Every 200,000
times
Every 500,000
times
Every 1 million
times
Low Normally operating with scarce inching
○
Medium
Normally operating with occasional inching
○
High Normally operating with inching at a half times or more
○
NOTE) · For single speed model, check the number of start with the CH Meter. (Refer to “Check of Operating Hours and Start Times (CH
Meter)”.(P92))
· For dual speed VFD model, check the number of start and operating hours with the indicator of the VFD by the maintenance engineer
inaccordancewiththeseparate“VFDManual”.
NOTE
Be sure to use the designated contactor.
■
Guidelines on Brake Inspection
When the number of start reaches at one million times, inspect the brake gap and carry out the following treatment
depending on the condition of the brake gap.
When the number of start reaches at two million times, replace the brake unit as a whole irrespective of the condition
of the brake gap.
Condition of brake gap Treatment
Brake gap reaches at the limit gap. Replace the brake as a whole.
Brake gap reaches at 50 to 100 % of the limit gap. Check the Brake at every 100,000 times until the brake gap reaches at the limit gap.
Brake gap is less than 50 % of the limit gap. Check the Brake at every 200,000 times.
■
Guidelines on Gear Parts Replacement (Load Gear, Gear B,
Pinion, Friction Clutch, Friction Clutch with Mechanical Brake)
Operating hours to replace parts
Body size grade
Every 800 hours Every 1600 hours Every 3200 hours
M6, 3m – – Parts replacement
M5, 2m – Parts replacement –
M4, 1Am Parts replacement – –
Guidelines for Parts Replacement based on Indication of CH Meter
2
(to be continued)
Operating hour for gear oil change
Rate of loading
Every 200 hrs Every 400 hrs
Light A case where the capacity is rarely applied. Usually the hoist is used with a light load.
○
Medium
A case where the capacity is applied considerably frequently. Usually the hoist is used
with a medium load.
○
Heavy
A case where the capacity is applied considerably frequently. Usually the hoist is used
with a heavy load.
○
Ultra
heavy
A case where the capacity is applied constantly.
○
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Guidelines on Needle Bearing (for Idle Sheave) Grease Change Cycle
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