AVANT 650, Operator'S Manual For Attachment

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6.3 Tightening hydraulic fittings
Tighten the fittings carefully according to given instructions and safety procedures. Keep in mind that over
tightening will break a fitting. Tighten basic fittings carefully with hand tools using moderate torque. The elbow
fittings should be tightened at last, after hoses have been fitted to their clamps.
1. Allow the hydraulic systems of the loader and of the attachment to cool down completely before any
work on hydraulic systems.
2. Make sure that the loader boom or any other part of the attachment can’t move causing crushing or
pinching hazards:
3. Lower the loader boom to its lower position and lower the broom firmly on the ground. For the best
stability, keep the attachment locked on the loader.
4. Shut down the loader engine.
5. Move the auxiliary hydraulics control lever to its extreme positions several times to release residual
pressure.
6. Uncouple the multiconnector or quick couplings from the loader to prevent draining of hydraulic oil.
Test to find any leaks
DANGER
Before checking for leakages, or going near any hydraulic fitting,
to avoid possible ejection of pressurized hydraulic oil:

Shut down the loader engine

Depressurize the hydraulic system completely

Wipe the hydraulic components clean to find leaks more
easily.

Place pieces of cardboard around the fittings to detect leaks.

Start the engine. While running on idle, operate the auxiliary
hydraulics control lever briefly a couple of times. Shut down
the engine, depressurize the hydraulics, and check for any
sign of leak. Tighten if necessary.

Repeat the test by gradually increasing engine rpm and
operating time. Use both directions of the auxiliary hydraulics
control lever.
DANGER
Risk of high pressure fluid injection through skin - Test the tightness of the
hydraulic fittings carefully.
Use idle rpm when starting the first time and keep a safe
distance due to the risk of hydraulic fluid ejection. Shut down the loader and release the
residual pressure before checking for leaks. Remember to use and wear protective
equipment.
DANGER
Risk of high pressure fluid injection through skin - Never test the tightness of the
hydraulic components by placing hands near the fittings.
Never tighten a
pressurized hydraulic fitting, since the fitting may break and the released oil may cause
serious injuries.