17
GB
4.2.2. Overview of maintenance work
Table 4-2 - Overview of maintenance work
Term
Annual
inspections
Activity
Notes
1. Seal
X
Visual inspection
2. Lifting chain
X
X
grease
measure wear
See sections
3.2.2
/
4.2.4
3. Braking system
X
Slip resistance test with load
See section
4.2.3
4. Electrical connections
X
Operating inspection
5. Safety screws on suspended
parts and lifting hook with
accessories
X
X
Crack detection
Screw play inspection
See section
4.2.8
6. Limit switch
X
Control of switching elements
See section
3.2.3
7. Slip friction clutch
X
Overload test
See section
4.2.7
4.2.3. Braking system
The spring brake is an electromagnetically actuated
single disc brake with two friction surfaces. The braking
force is provided by pressure springs. Braking torque is
generated when the system is switched off. Release is
electromagnetic.
The brake must be able to hold the rated load when the
power is switched off.
CAUTION:
The voltage of the brake coil must
necessarily match the operating voltage.
4.2.4. Lifting chain
Lifting chain wear must be measured from time to time.
4.2.5. Limit stop
CAUTION:
If the stop plate at the bottom of the
casing is defective, it must be replaced.
Check the screw connection at the end and the block
assembly and, if necessary, tighten to the recommended
torque. Guidance values in section 4.2.8.
4.2.6. Gear
The reducer gears are permanently lubricated. The
reducer casing must not be opened.
4.2.7. Friction coupling
The friction clutch is factory set at 125% of the maximum
working load.
4.2.8. Suspension pieces
All parts under static loads are considered to be load-
bearing parts. The bearing surfaces of swivelling
suspension pieces must be greased periodically.
Tightening torques for class 8.8 screws to DIN ISO 898:
M 4
M 5
M 6
M 8
M 10
M 12
3.3 Nm
6 Nm
10 Nm
24 Nm
48 Nm
83 Nm
Data for ordering spare parts can be found on page 3.
Table 4-3: Wear values for suspension pieces
Suspension piece
TT 125
TT 250
TT 500
TT 1000
TT 1600
TT 2500
Load hook
H
[mm]
18.0
28.0
28.0
35.5
35.5
35.5
min. h [mm]
17.1
26.6
26.6
33.8
33.8
33.8
Suspension hook
H
[mm]
18.0
28.0
28.0
35.5
35.5
35.5
min. h [mm]
17.1
26.6
26.6
33.8
33.8
33.8
Hanging eye
H
[mm]
11.0
15.0
15.0
20.0
20.0
20.0
min. h [mm]
10.5
14.3
14.3
19.0
19.0
19.0
Hook opening
L
[mm]
24.0
34.5
34.5
42.6
44.6
44.6
min. l
[mm]
26.4
37.9
37.9
46.8
49.0
49.0
Summary of Contents for tralift TT 1000
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