AVANT A2868, Руководство оператора для насадки

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6. A sufficient free length (about 125 cm) must
be left in between the hose clamp and the
hydraulic couplings, so that the attachment
can be moved and tilted in all positions of
the boom. After installation, test movements
of the loader boom as shown on page 12.
7. Set the hoses neatly, as shown in
adjacent figure, and tighten the hose
fittings well.
8. Connect the multiconnector or the
conventional couplings to the loader.
9. Coil the protective spiral around the
hoses and tighten the hose clamp.
10. Test the tightness of the fittings and the
operation of the attachment as shown
below.
Tightening hydraulic fittings
Care must be taken when tightening hydraulic fittings, as overtightening of the fittings will break the fittings
easily. Tighten fittings tightly using moderate force. Never tighten a fitting if the hydraulic system is
pressurized.
Tightening the connecting nipples of the multiconnector:
Lubricate the inner surfaces and threads of the fittings. Turn the tapered type fittings with
fingers or lightly with tools as far as possible. When noticing clear increase in needed force,
tighten fitting by turning 1/3 to 1/2 turns using tools. The fitting is not tightened by torque and
it will not need a lot of force at any point when tightening. Overtightening will break the fitting.
Try to twist the hydraulic hose by hands after tightening, the fitting should stay firm.
Test to find any leaks
- Clean the hydraulic components to find leaks more easily.
- Place a piece of cardboard below 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.
- At first the grapple may move inaccurately, as the cylinder and the hoses may have air trapped in them.
The system will de-air itself automatically when the grapple is moved to its extreme positions.
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