Brake System; Load Chain; Limit Stop Assembly; Gearbox - Tractel tralift TT Serie Manual De Instalación, De Utilización Y De Mantenimiento

4.2.3. Brake system

The spring-loaded brake is a solenoid operated single disk brake with
two friction surfaces. The braking force is applied by compression
springs. The braking torque is generated when no current is applied. The
ventilation is electromagnetic. The brake operates with DC current.
The brake must be able to hold the nominal load in power free mode
without any problems.
CAUTION!
The brake coil voltage must be the same as the operating voltage.

4.2.4. Load chain

The load chain should be periodically checked for abrasion.

4.2.5. Limit stop assembly

CAUTION!
A damaged buffer plate, underneath the housing, must be replaced.
EN
Suspension part
Load hook
Hook suspension
Eyebolt suspension
Figure 4-1
5. Measures for obtaining a safe period of
operation
The statutory and health requirements of the EU regulations stipulate
that specific dangers which may arise from fatigue or ageing must be
prevented.
Accordingly, operators of standard hoist gear are obliged to determine
the actual utilization. The actual utilization period is determined and
recorded as part of the annual inspection by customer service engineers.
A general overhaul must be carried out when the theoretical utilization
limit is reached, or after no more than 10 years.
All checking and the general overhaul itself must be arranged by the
operator of the hoist gear. The following theoretical utilization periods
12
TT 250
h [mm] 28.0
h min. [mm] 26.6
h [mm] 28.0
h min. [mm] 26.6
h [mm] 15.0
[mm] 14.3
Screw connections at the limit stop and shims or lower sheaves should
be checked and, where necessary, tightened to the right torque. For
coefficient data see chapter 4.2.8.

4.2.6. Gearbox

The gearing has continual lubrication.

4.2.7. Slip clutch

The slip clutch is set at 125% at the factory.

4.2.8. Suspension parts

All statically loaded parts are considered suspension parts. The bearing
surfaces of the slewing suspension parts must be periodically greased.
Torque values for screws of property class 8.8 according to DIN ISO 898:
M 4 M 5 M 6
3.3 Nm 6 Nm 10 Nm
TT 500
28.0
26.6
28.0
26.6
15.0
14.3
apply to electric chain hoists that are categorized according to ISO 4301-
1 (converted into full-load hours):
M3 M4 M5
400 h 800 h 1600 h

5.1. Determining the actual utilization period S

The actual utilization period depends on the daily operating time and the
load collective.
Running time is determined from information provided by the operator
or recorded using a meter that counts the number of operating hours.
The load collective is determined in accordance with Table 2-1 – Load
collectives, page 6. These two items of information are used to
calculate the annual utilization period from Table 5-1 – Annual service
life.
If an operating data acquisition system (BDE) is used, the actual utilization
can be read out directly by our experts during the annual inspection.
CAUTION!
The values periodically calculated or read-off must be recorded in the
log book.

5.2. General overhaul

On reaching the theoretical service life (no later than 10 years for recording
without BDE), a general overhaul should be performed. This enables the
equipment to continue operating safely for a further period of utilization
(service life). Components must be inspected and/ or replaced in this
overhaul. Inspection and approval for further use must be performed
either by a specialist company authorized by the manufacturer, or by the
manufacturer personally.
The inspector determines:
– the new theoretical utilization possible;
– the maximum period until the next general overhaul.
This data should be recorded in the log book.
M 8 M 10 M 12
24 Nm 48 Nm 83 Nm
TT 1000
35.5
33.8
35.5
33.8
20.0
19.0
M6 M7 M8
3200 h 6300 h 12500 h