BA 348-01 * 2.0 * 34801b340.fm 3-85
Operation 3
Connecting hydraulic lines to the wheel loader
The hydraulic system of the machine is still pressurized 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.
• Release the pressure on the hydraulic quick couplers before starting setup
or repair work, for example fitting/removing an attachment!
Clean the quick couplers carefully before connecting an attachment in order to
ensure correct functioning and sealing!
Furthermore, the pressure in the quick couplers has to be released before they
are connected –seePressure relief on the quick couplers and the quickhitch
on page 3-72.
☞Connect the hydraulic lines as follows:
• Stop the engine, but do not switch off the ignition
• Apply the parking brake
• Release the pressure in the hydraulic lines
–seePressure relief on the quick couplers and the quickhitch on page 3-72
• Clean the hydraulic connections on the multipurpose bucket and the quickhitch
• 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 (to open the multipurpose bucket)
➥ Flexible line B onto quick coupler D (to close the multipurpose bucket)
• Close the quick couplers on the quickhitch with protective caps
Never connect the hydraulic lines crosswise, otherwise the attachment
functions are inverted and the hydraulic lines are squeezed by tilting the
attachment in and out.
☞Check the multipurpose bucket for correct function
Fig. 119 : Connecting hydraulic lines
AB
D C
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