R&M LK10C022200, Owner'S Manual

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Step 5: Calculate the DWP% and remaining service life
Check the hoist operating group which can be found on the hoist’s rating plate.
In the appropriate column of the following table, find the number closest to S . The two final columns on the same
row will tell you the remaining DWP% and the estimated remaining service life.
Hoist operating group marked on hoist's rating plate
DWP %
Estimated remaining
service life [years]
M3 (1Bm) M4 (1Am) M5 (2m) M6 (3m) M7 (4m) M8 (5m)
Actual duration of service, S [h]
0 0 0 0 0 0 100 % 10
40 80 160 320 630 1250 90 % 9
80 160 320 640 1260 2500 80 % 8
120 240 480 960 1890 3750 70 % 7
160 320 640 1280 2520 5000 60 % 6
200 400 800 1600 3150 6250 50 % 5
240 480 960 1920 3790 7500 40 % 4
280 560 1120 2240 4410 8750 30 % 3
320 640 1280 2560 5040 10000 20 % 2
360 720 1440 2880 5670 11250 10 % 1
400 800 1600 3200 6300 12500 0 % 0
Record the value of the DWP % in the log book.
For example , if we use S = 640, Hoist duty group = M5 (2m) then the DWP % = 60 %:
When the DWP % reaches zero, a General Overhaul (GO) must be conducted. Refer to chapter General Overhaul
(GO).