Cleaning, maintenance and repairs
-V BAG0087.11 01.20
12.9.2 Maintenance intervals
After the first 10 operating hours, and then every 50 operating
hours
1. Check all the components of the hydraulic system for tightness.
2. If necessary, tighten screw unions.
Before each start-up:
1. Check hydraulic hose lines for visible damage.
2. Eliminate any scouring points on hydraulic hose lines and pipes.
3. Immediately replace worn or damaged hydraulic hose lines and
pipes.
12.9.3 Inspection criteria for hydraulic hose lines
For your own safety, comply with the following inspection criteria!
Replace hydraulic hose lines if the respective hydraulic hose line
fulfils at least one of the following criteria:
• Damage to the outer layer up to the ply (e.g. scouring points,
cuts, cracks).
• Brittleness of the outer layer (crack formation of the hose mate-
rial).
• Deformations which do not match the natural shape of the hose
or the hose line. Both in a depressurised and pressurised state
or when bent (e.g. layer separation, bubble formation, pinching,
bends).
• Leak points.
• Damage or deformation of the hose assembly (sealing function
restricted); minor surface damage is not a reason for replace-
ment.
• Movement of the hose out of the assembly.
• Corrosion of assembly, reducing the function and tightness.
• Installation requirements not complied with.
• Life span of 6 years has been exceeded.
→ The date of manufacture of the hydraulic hose line on the as-
sembly is decisive for determining these six years. If the date of
manufacture on the assembly is "2004", then the hose should
not be used beyond February 2010. See also "Labelling of hy-
draulic hose lines", page 49
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