6.Maintenance and overhaul
A
Danger
Except monthly examination about performance of brake and limit
switch, never have it maintained under loading condition.
A
Danger
Before maintenance, be sure to lable "danger" and "overhaul"
on the power supply and controller.
6.1 Maintenance
(l)When the gear operation times reaches more than 500 hours, to check the amount of lubrication,
and later check the lubrication every 3 months regularly.
Remarks: we recommend that using the engine oil same as grade ISOVG46 oil.
(2)Check the dryness of the hoist parts frequently, and forbid to abuse the hoist; otherwise, its dura-
bility may be reduced.
(3)If it is operated outdoors, please add a protection cover.
6.2 Overhaul
(l)Daily inspection:before daily operation, please check the following items:
(a) Proper power supply.
1111111
(b) Test the "up", "down" and "emergency stop" (if installed) without load.
(c) The motor works normally.
(d) there is no abnormally or excessively high noise.
(e) the safety latch of the lower hook functions properly and is free of faults.
(f) the rotatable or movable parts and the limit switch as well as the brake function normally.
(g) the chain is lubricated well.
(2)Monthly inspection
A
Warning
In maintenance, please use the original parts
recommended by the manufacturer.
(a) Chain
Any distorted, extended, or worn chain will not be good locked with chain wheel, result
in the breakdown or disengaging of the chains. To ensure the safe and normal operation,
the internal length and width, external width of the chain must be checked monthly. If in
the following situation, the chain must be replaced.
l)The internal length of the chain (p) is worn and extended 5% higher than the values
as listed in Table 6.1
2) The wearing of the diameter of the chain link (d) is lower than the value listed in
table 6.1 (The wearing of nominal diameter reaches 10% higher than the original one)
******
When the wearing of chain is high, be sure to confirm the wearing of the chain wheel and chain g u i d e * * * * * *
q)
V·I
Cl"I
1
p
Diameter
Internal
(mm)
Capacity
length
(d)
(ton)
(mm)
(p)
6.3
0.5
19
7.1
1, 2, 3
21
Fig.6.1
Chain size
10.0
1.5, 2, 3
30
11.2
2.5-7.5
34
Table 6.1
(b) Hoist hook
Internal External
width
width
(mm)
(mm)
(a)
(b)
7.5
20.5
8.9
23
12.5
33
14
37.2
Check the hook carefully. Its crack or distortion is over 5% than original one,
it should be replaced.
C
Please refer to the sizes in the following table)
Capacity
a
b
C
d
e
g
(ton)
0.5
27
18
25
17
35
28
1
34
24
30
24
42
32
2
46
29
39
30
49
40
3
56
35
49
34
59
48
5
67
43
57
44
60
48
7.5
82
55
80
48
85
80
Fig.6.2
Table 6.2
..
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