Specifications

27
User’s, Installation and Maintenance Manual
6.4.5 Torques Assurance
Check tightening torques of all screw connections with
approved and calibrated torque wrench in the
following cases:
1. In tower factory, during assembly of ladder section
to tower section.
2. On site, pre-commissioning, and in each annual
inspection.
See joints to be checked and appropriate tightening
torques for each case in the list below:
Ladder: TORQUE (N•m)
ASSEMBLY IN
TOWER
FACTORY
ASSEMBLY
ON SITE
JOINT METRIC
Rung U-bolts
12 50 50
Rest platforms
attachment
12 50 50
Ladder sections
12 50 50
Ladder
anchorages –
Tower brackets
12 50 12
Rung fittings of
safety rail 6 8 8
Ladder – Top
mechanical stop 8 15 15
Ladder – Bottom
mechanical stop 8 15 15
Motor group: TORQUE (N•m)
ASSEMBLY IN
TOWER
FACTORY
ASSEMBLY
ON SITEJOINT METRIC
Gear box –
Centrifugal brake 8 15 15
Motor group – Main
structure 8 15 15
Motor – Centrifugal
brake 8 15 15
Cabin: TORQUE (N•m)
ASSEMBLY IN
TOWER
FACTORY
ASSEMBLY
ON SITEJOINT METRIC
Fall protection an-
chor point – Cabin
12 50 50
Roller shafts –
Main structure 12 50 50
Counter roller
guide shafts –
Main structure
12 50 50
Anti-derailment
brackets 8 15 15
6.4.6 Overload, static and dynamic tests
1. Overload detection system test: check that the
overload detection system works by applying a load of
125% of working load limit to the lift floor. The service
lift shall not move UP and the overload light on the
control box shall be on.
2. Static test: apply a load of 125% of working load
limit to the lift floor. The service lift shall not show any
damage or cracks.
3. Dynamic test: apply a load of 110% of working load
limit to the lift floor. The service lift shall be able to
move UP.
If the overload detection system fails, an expert
must verify the system.
6.4.7 Motor group
6.4.7.1 Gear box
1. Visually check for oil leaks. In case oil leaks are
found, exchange the gasket on the gear box cover,
and re-fill with oil as needed.
2. Close the cover and ensure that the correct torque
is applied.
6.4.7.2 Centrifugal brake
1. With cold centrifugal brake, perform a manual test in
power descent on approximately 2 m. The descent
has to be done at maximum speed of 24 m/min. If the
speed is more than 24 m/min, put the lift out of service
and call service for replacement as the centrifugal
brake means are not in good conditions.
2. Review lining and hubs. The lining of the centrifugal
brake has a friction surface that is worn with use. If
thickness is reduced to half the original, replace linings
and hubs.
This operation shall be done only by qualified
personnel and following the centrifugal brake
manufacturer instructions.
6.4.7.3 Motor brake
1. Load the service lift with a load of 1.1 times the
nominal load. Release one of the two motor brakes by
pulling its hand lever. While keeping the brake open,
push the UP button and stop after 0,5 m. The cabin
should stop and the brake must be able to hold the
cabin. Repeat this operation 3 times.
2. Repeat the operation with the other motor brake.
If any of the two motor brakes fail to stop and hold the
service lift in position, proceed as follows:
3. Measure the air gap. If the air gap is greater than
specified by the manufacturer and the brake disc
thickness is sufficient, readjust the air gap according
to the motor brake manufacturer’s specifications.
Check the brake discs and the springs for irregularities
or damages. If any damages or broken parts are
found, replace motor brake.
6.5 Ordering spare parts
Only original parts must be used. Spare parts list is
available from AVANTI upon request.