GreenTec 9991902C-25, Instruction Manual

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6.4 HYDRAULIC HOSES
When inspecting hydraulic hoses, any damage / defect must be rectified
immediately. When searching for leaks, due to danger, suitable aids must be
used: goggles, work a piece of cardboard that quickly makes a leak
visible!
Thin jets of hydraulic oil under high pressure can penetrate the skin and cause
serious injuries!
In the event of injuries of this nature, seek medical attention immediately:
DANGER OF INFECTION!
Check the condition of all hoses on regular inspections. Pay special attention to the fact that they do
not rub against edges, bolts, etc., and that the protection sleeves is correctly fitted so that the hoses
are always protected as best as possible.
Check all hydraulic hoses and fittings daily. Any damage or leak must be repaired immediately. Hoses
with damage / defects must be replaced.
GreenTec's hydraulic systems operate at a very high pressure. Use only original hoses. A broken hose
can be very dangerous.
When replacing hydraulic hoses, always avoid twisting hoses and fittings.
•
Use 2 wrenches to loosen and tighten the hydraulic hoses/fittings.
•
Avoid over-tightening (Correct tightening torques is stated in Table 21 – page 57
•
If the hoses and / or fittings continue to leak, these must be replaced immediately.
A flexible hose must not be twisted during installation, as this significantly
reduces the life of the hose and can cause the connections to loosen.
To determine if a hose is twisted or not, the specification line running along
the length of the hose must be straight.
If the specification line spirals around the hose, the hose is twisted:
A flexible hose must never be stretched tightly between two fittings.
Approx. 5 to 8 percent of the total length should be allowed as slack to allow
free movement under pressure.
Under pressure, a flexible hose is pressed lengthwise and expanded in
diameter.