Cleaning
, maintenance and repairs
V-COMFORT Bedding
87
11.4.1
Markings on hydraulic hose lines
The markings on the fitting (Fig. 11-6) provide the
following information:
(1) Manufacturer's marking of the hydraulic hose line
(A1HF)
(2) Date of manufacture of the hydraulic hose line
(07/10 = year/month = October 2007)
(3) Maximum permissible operating pressure
(210 BAR)
Fig. 11-6
11.4.2
Inspection criteria for hydraulic hose lines
For your own safety:
Replace hydraulic hose lines immediately as soon as discovering any of the following
defects:
Damage to the outer layer up to the insert (e.g. from chafing, cuts, cracks).
Embrittlement of the outer layer (evident through the formation of the cracks in the
hose material).
Unnatural deformation of the hydraulic hose line, e.g. layer separation, formation of
bubbles, pinch points or kinks.
Leaking spots.
Damage, deformation or leaks in the hose fitting.
The hose slipping out of the fitting.
Corrosion on the fitting which may impair the operation and stability of the fitting.
Improperly routed hydraulic hose lines, e.g. failure to observe the bending radii or
laying the hose lines across sharp edges.
The maximum period of use of 6 years has been exceeded.
The period of use is derived from the date on which the hydraulic hose line was
manufactured plus a period of 6 years.
Example (Fig. 11-6): The date of manufacture of the hydraulic hose line is specified
on the fitting, e.g. (07/10 = year / month = October 2007). The period of use will,
thus, end in October of 2013.
