3-76 BA 35101/02/03 EN – Edition 1.0 * 35101_02_03b340.fm
Operation
Connecting the hydraulic lines of a multipurpose bucket to the wheel loader
The hydraulic system of the machine is still pressurised even when the engine
is not running! The hydraulic quick couplers can be released, however they
cannot be re-attached because the pressure in the hydraulic lines has not
been released. Therefore:
• Release the pressure in the sections of the system and hydraulic lines
which are to be opened before starting setup or repair work, e.g. fitting/
removing an attachment!
☞ Proceed as follows:
• Stop the engine
• Apply the parking brake
• Release the pressure in the hydraulic lines
➥–seePressure relief on the quickhitch couplers on page 3-65
• Clean the hydraulic connections on the multipurpose bucket
• Remove flexible lines A and B from the quick couplers of the quickhitch and connect
them onto the quick couplers of the multipurpose bucket
➥Flexible line A onto quick coupler C
➥Flexible line B onto quick coupler D
Never connect the hydraulic lines crosswise, otherwise the attachment
functions are inverted and the hydraulic lines squeezed by dumping the
attachment in and out.
☞ Check the multipurpose bucket for correct function
If the attachment is placed in direct sunlight after having been taken off, the oil
in the hydraulic rams will warm up. This leads to a pressure increase in the
hydraulic rams that will make it difficult to attach the hydraulic lines to the
hydraulic connections.
Fig. 126: Connecting the hydraulic lines onto a multipurpose
bucket
AB
D C
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