62
6.1.2
Hoist Motor Gear Grease – The C/H Meter can be used in conjunction with the average load lifted
by the hoist to estimate when the gear grease should be changed. Refer to
Table 6-3
.
Table 6-3 Criteria for Recommended Gear Grease Oil Replacement
Loading During Normal Operation
Change Gear Oil After:
(hours)
Rating
Average % of Rated Capacity
Light
0 to 33%
360
Medium
33 to 67%
240
Heavy
67 to 100%
120
6.1.3
Hoist Motor Brake – The C/H Meter can be used to determine when the Hoist Motor Brake should
be monitored or replaced. Refer to
Table 6-4
.
•
When 1 Million starts have been achieved, inspect brake gap referring to
Table 6-4
criteria.
•
When 2 Million starts have been achieved, replace brake drum, motor cover, brake spring and
pull rotor regardless of brake gap.
Table 6-4 Criteria for Brake Replacement
Condition of Electromagnetic Brake Gap
(Ref.
Table 5-7
for Gap Wear Dimension)
Action
Brake gap is less than 50% of the limit.
Check the Brake at every 200,000
starts.
Brake gap reaches 50 to 100% of the limit.
Check the Brake at every 100,000
starts until the brake gap reaches at the
limit gap.
Brake gap reaches the limit.
Replace the brake drum, motor cover,
brake spring and pull rotor spring
6.1.4
Hook and Yoke – The C/H Meter can be used to determine when the Top/Bottom Hook and Yoke
should be replaced. Refer to
Table 6-5
.
Table 6-5 Criteria for Top/Bottom Hook and Yoke Replacement
Rate of Loading
Number of Starts to replace
Hook and Yoke
Light - The hoist is mostly used with a light load.
Rated capacity rarely applied.
Every 2 million starts.
Medium – The hoist is mostly used with a medium
load. Rated capacity frequently applied.
Every 1.5 million starts.
Heavy – The hoist is mostly used with a heavy load.
Rated capacity frequently applied.
Every 1 million starts.
Ultra-Heavy – Rated capacity constantly applied.
Every 1 million starts.
6.1.5
You are encouraged to use the Count/Hour Meter in conjunction with your experience with the
hoist's application and usage to develop a history upon which to gage and fine tune your
maintenance program for the hoist.
Summary of Contents for Harrington RY Series
Page 15: ...15 2 3 Part Names Figure 2 1 RY Part Names...
Page 42: ...42 Figure 3 20 Hoist Upper and Lower Limit Switch ULLS...
Page 57: ...57 Table 5 8 Various shapes that require the wire rope to be replaced...
Page 67: ...67 Table 6 9 Motor Brake Gap Capacity Code Brake Gap G inch mm RY030 RY050 0 032 0 8...
Page 104: ...104 9 3 Trolley Frame Parts Figure 9 3 Trolley Frame Parts...
Page 112: ...112 9 10 Hoist Motor Parts Figure 9 10 Hoist Motor Parts...
Page 114: ...114 9 11 Trolley Motor Parts Figure 9 11 Trolley Motor Parts...
Page 116: ...116 9 12 Control Panel Box Parts Figure 9 12 Control Panel Box Parts...
