Tadano ATF 130G-5, Translation Of The Original Operating Manual

Page: 468 / 636

According to DIN 15018 T3, different stress tolerance coefficients are determined for different high-
strength fine-grain construction steels. TADANO cranes have been designed in compliance with
this standard for the load spectrum S
1
light as well as a stress tolerance coefficient of 25000 load
cycles. A suitable service life of a crane is determined based on this and the operating conditions.
The service life does not depend solely on the specified stress tolerance coefficient, but primarily
depends on the loads exerted on the crane during the operation period.
The following drawings
[page 470] show a few load-bearing steel structures of the crane and give
the tester a few indications regarding the points to be checked. Points marked with arrows are
highly stressed zones and must be checked when testing and depending on the operating condi‐
tions.
We would however like to explicitly emphasize that the drawings do not claim to be complete.
If damage (e.g. cracks, deformations) is detected during these tests, please contact an expert.
After inspecting the damage as per the instructions in the chapter "Welding and Alignment work"
from the Maintenance and repair section, consult TADANO.
The repair method should then be decided on in consultation between TADANO and the expert.
WARNING
Welding activities not carried out properly!
Damaged parts may fail under load. It may result in an accident involv‐
ing personal injuries or even death.
1. Only expert personnel may carry out welding activities.
2. Welding regulations must be observed implicitly.
4.2.1 Measures to protect electronic parts during welding
CAUTION
The ground terminal of the welding machine is connected to an incor‐
rect point on the mobile crane!
The flow of current can cause damage to loose connections, e.g. tooth
flanks, bearings, spline ends, shafts, the electronics, the automatic safe
load indicator, etc.
1. When electrowelding, the ground terminal of the welding machine
must be connected directly to the part to be welded.
If it is necessary to carry out welding on the mobile crane, the following steps must be carried out
before beginning work to protect the electronic control units:
1. Switch off the battery main switches in the carrier and the superstructure,
2. Disconnect the battery cables at the negative poles in the carrier and the superstructure, then
disconnect the battery cables at the positive pole and connect with each other,
4 Crane testing instructions
468
ATF 130G-5 2146097
2014-09