Terex MHL360 E - Page 44

2 SAFETY AND ACCIDENT PREVENTION
2.22 MHL360 E
 Even if they are stored properly and sub-
jected only to permissible loads, hoses and
hose lines are susceptible to natural wear.
Their service life is therefore limited.
- Improper storage, mechanical damage
and impermissible use are the most fre-
quent causes of failure.
- With regard to service life, all standards,
rules, and regulations regarding hoses
and hose lines which are applicable at the
site of operation must be observed.
- Use in the limit zone of permissible load
can reduce service life (for example high
temperatures, frequent changing move-
ments, extremely high pulse frequencies,
multi-shift operation).
 Hoses and hose lines must be replaced if
any of the following conditions are encoun-
tered during inspections:
- Damage to the outer hose up to the inlet
(e.g. abrasion, cuts and tears)
- Thinning of the outer layer (appearance of
cracks in the hose material)
- Deformation distorting the natural shape
of the hose or hose line both when pres-
surized and when depressurized, as well
as when bent (e.g. separation of layers,
formation of bubbles)
- Leaks
- Noncompliance with installation require-
ments
- Damage to or deformation of the hose fit-
ting that reduces the stability of the fitting
or the hose/fitting connection
- Hose coming loose from the fitting
- Corrosion of the fitting which reduces
functionality and stability
- Exceeding of storage times and usage
periods
 When replacing hoses and hose lines, use
only original spare parts.
 Lay and mount hoses and hose lines
properly. Do not mix up connections.
 When replacing hoses and hose lines,
please note:
- Always make certain hoses and hose
lines are not under torsion when installed.
For high-pressure hose lines, the screws
and half-clamps or full flanges at both
ends of the hose must be fitted first and
then tightened.
- For high-pressure hoses and hose lines
with curved fittings, when tightening the
flange, the side with the curved fitting
must always be tightened first, followed by
the side with the straight fitting.
- Any fastening clamps located in the mid-
dle of the hose must be attached first and
then tightened.
- Check daily to make certain all clamps,
covers, and protective devices are proper-
ly fastened. This will prevent vibrations
and damage during operation.
- Lay the hoses and hose lines so that they
cannot rub against other hoses or parts.
- When replacing hoses and hose lines on
moving parts (for example from the boom
to the dipperstick), check the entire range
of movement for abrasion points before
putting the machine into operation for the
first time.