u
Check the hydraulic hoses for damage on a regular basis or at least before the start of the
spreading season, by means of a visual inspection.
u
Before the start of the spreading season, check the age of the hydraulic hoses. Replace the
hydraulic hoses when the prescribed period for storage and usage has been exceeded.
u
Replace the hydraulic hoses if they show one or several of the following types of damage:
w
Damages to the external layer up to the insert
w
Embrittlement of the external layer (crack formation)
w
Deformation of the hose
w
Hose moving out of the hose fitting
w
Damages to the hose fitting
w
Resistance and function of the hose fitting reduced due to corrosion
11.12.2
Replacing hydraulic hoses
n
Hydraulic hoses
Hydraulic hoses are subject to aging. They may only be used for a maximum of 6 years, including a
storage period of a maximum of 2 years.
The manufacturing date of a hose line is indicated in one of the hose fittings as year/month
(e.g., 2012/04).
Preparation
u
Ensure that the hydraulic system is depressurized and has cooled down.
u
Provide collection trays for leaking hydraulic oil below the separation points.
u
Have suitable plugs ready in order to prevent a leaking of the hydraulic oil out of the lines which
cannot be replaced.
u
Provide suitable tools.
u
Put on your protective gloves and glasses.
u
Ensure that the new hydraulic hose corresponds to the type of hydraulic hose to be replaced. In
particular, observe the correct pressure range and hose length.
There are two nitrogen tanks in the hydraulic circuit. These also remain under pressure after system
shutdown.
u
Slowly and carefully open the screw connections of the hydraulic circuit.
Observe the different maximum pressure specifications on the hydraulic lines to be replaced.
11. Maintenance and service
138
5902916
MDS 8.2/14.2/18.2/20.2
Summary of Contents for MDS 8.2
Page 150: ......
