Ammann APR 4920 Mode D'emploi Original page 71

8.7.2 Hydraulic hose lines
1 Ammann Ar ti cle No.
2 Man u fac turer/Month and year of man u fac ture
3 Max. op er at ing pres sure
The func tion of hy drau lic hose lines must be tested at reg u lar in -
ter vals (min i mum once a year) by an ex pert (with a knowl edge of
hy drau lics).
Hose lines must im me di ately be re placed in the fol low ing in -
stances:
•
Dam age to the outer layer to the in ner lin ing (abra sion marks,
cracks, cuts, etc.).
•
Brit tle ness of the outer layer (crack ing of hose cov er ing).
•
Un nat u ral de for ma tions of the hose line. This ap plies to both a
pressureless and pres sur ised con di tion (e.g. layer sep a ra tion,
blis ter for ma tion, crushed ar eas, kinks).
•
Leaks.
•
Dam age or de for ma tion of hose fit tings (im paired seal ing
func tion).
•
Hose slips out of the fit ting.
•
Cor ro sion of fit ting (de grad ing of func tion and strength).
•
Im proper in stal la tion.
•
Use be yond the ex piry date of max. 6 years.
8. Maintenance machine
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