Pneumatic chain hoist CPA ATEX
13 of 21
towards the chain guide in the housing. Then the chain can be run in
by pressing the
-button.
4. Fitting the chain end stop
Before installing the bottom block, slide the buff er on the idle strand
of the load chain. After installing the chain end stop, at least 1 chain
link must remain.
5. Fitting the chain pin
Inspect the chain pin for fl aws, cracks or burrs before fi tting. Then, enter
the fi rst chain link of the load-side chain strand into the corresponding
recess on the underside of the pneumatic hoist housing.
Attention:
The chain should not become twisted in the process.
Then the chain pin is driven through the lateral hole in the housing by
means of a punch/awl.
Attention:
The chain must remain mobile during the entry so that it is
not damaged by the bolts.
The bolt must fi nally be locked with the screw plug.
6. Mounting the bottom block
First, inspect the roller for damage. Then put the chain on the roller. The
weld of the vertical chain links must point away from the chain wheel.
Then insert the hook beam into the fi rst half of the housing and slide
the whole unit onto the roller. Push the roller onto the roller pin. Prior
to that, grease the needle roller bearings. Make sure before placing and
tightening the second half that the buff er lies in the provided groove.
7. Function check
All units equipped with two or more chain strands must be inspected
before each initial operation to ensure that the load chain is not twisted
or kinked. Chains on 2-strand units may become twisted if the bottom
block is rolled over. If a strand is twisted disconnect it from the hoist
and re-thread it correctly. In some cases it may be necessary to remove
the last chain link.
8. Before the initial operation, lubricate the load chain and test all hoist
functions under no-load condition.
Fig. 17
Fig. 18
The axial clearance
Δ
of the load hook in the direction of force in the
bottom block and in the top hook assembly (see Fig. 18) has to be
determined additionally at every inspection.
If the measurement is larger than 1 mm a special maintenance service
is required for the hook head, the balls and the bottom block or the top
hook assembly, respectively.
The following lower limits are to be obtained:
Inspection
Measure-
ment
CPA 20-8
CPA 30-6
CPA 40-4 / 50-3
60-3 / 75-2 / 100-3
min. measurement
in mm
min. measurement
in mm
Ball diameter
4.75
5.7
Hook head
α
6.3
7.9
Bottom block
β
8
9.2
Axial clearance
Δ
1
1
8.4 MAINTENANCE OF TOP HOOK AND LOAD HOOK
Inspect the load hook for deformation, damage, surface cracks, wear and
signs of corrosion as required, but at least once a year. Actual operating
conditions may also dictate shorter inspection intervals. Hooks that are
rejected during the check must be immediately replaced with new ones.
Welding on load hooks, e.g. to compensate for wear, is forbidden. Load
hooks must be replaced when the mouth of the hook has opened more
than 10% (Fig. 17) or when the nominal dimensions are reduced by 5% as
a result of wear. Nominal dimensions and wear limits are shown in table
3 below. If the following limit values are reached, replace the components.
Inspection
Measure-
ment
CPA 20-8
CPA 30-6
CPA 40-4 / 50-3
60-3 / 75-2 / 100-3
nominal
Measure-
ment
mm
min.
Measure-
ment
mm
nominal
Measure-
ment
mm
min.
Measure-
ment
mm
Rear of the hook
b
2
24
22.8
29.5
28
Base of the hook
h
2
35
33.2
44.5
42.3
Opening of the hook
a
2
43
47.3
54
59.4
Free gap
a
1
37
40.7
46
50.6
Tab. 3
