CONTROLS
Accessories
Auxiliary
Hydraulic
Lines
AwARNING
Oil
may spray out if caps or filters are
removed or pipes disconnected before
releasing the pressure
in
the hydraulic
system.
• When removing plugs or disconnecting
hoses, release the internal pressure
before removing.
These lines deliver the hydraulic oil necessary
for operating other attachments.
• Auxiliary hydraulic flow rate and rated
pressure:
Flow Rate .................... .
TL220: 57
Umin
(15.1
US gpm)
TL230: 70
Umin
(18.4 US gpm)
TL240: 75
Umin
(19
.8 US gpm)
TL250: 89
Umin
(23.4 US gpm)
Rated Pressure
...
..... 20.6 MPa (2987 psi)
Connecting the Hydraulic Circuits
To
connect attachment hydraulic lines, use
the following procedures:
1.
Release the pressure remaining
in
the
lines.
Refer
to
"Releasing residual pressure".
2.
Remove the plugs.
3.
Connect the attachment hydraulic lines
to
ports
(a)
and
(b).
When fitted with a hydraulic breaker:
a. Connect the return circuit
to
port
(b)
and the supply circuit
to
port
(a)
.
b.
Turn
on the flow selector switch
(C).
Refer to page 58, "Flow Selector
Switch."
64
Some attachments may have a case
drain, which needs
to
be connected
to
the small port
(T)
.
4.
When connecting
is
complete, purge air
from the hydraulic lines.
a. Start and
run
the engine at low idle with
no load for 10 minutes.
b.
With the engine running at low idle,
operate the auxiliary hydraulics switch
repeatedly (approx. 10 times)
to
purge
air from the hydraulic lines.
c. Stop the engine and wait for more than
5 minutes until bubbles escape from
the hydraulic oil
in
the tank.
IMPORTANT: Follow the procedures for
purging air as instructed by the attachment
manufacturer if specified to do
so.
5.
Check for leaks.
Disconnecting the Hydraulic Circuits
1.
Release
the pressure remaining
in
the lines.
Refer
to
"Releasing residual pressure."
2. Disconnect the lines from ports
(a)
and
(b)
.
3.
Install the plugs.
Releasing Residual Pressure
After using the auxiliary hydraulic circuits,
pressure remains
in
the circuits. This is called
the residual pressure. Release this residual
pressure before disconnecting the lines.
-'
\-
,,
U18004
1.
Start the engine and lower the safety bar
to
the released position.
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