Buhler 535 - Manual (Page 119)

3-90
435/485/535
Hydraulic Motor Application
 . Use hydraulic motors designed for closed center or
pressure/flow load compensating hydraulic
systems only .
Do Not use a hydraulic motor
designed for open center hydraulic systems
unless it is adapted for use by removing the inlet
restrictor .
2 . Rating: Hydraulic motors up to  .26 L/SEC
(20 .0 GPM) @ 5 .50 MPa (2248 PSI) can be
used .
3 . Be sure the hydraulic motor does not have restrictors
in the ports or fittings .
4 . Hydraulic motors less than 0 .63 L/SEC
(0 GPM) may be equipped with 2 .7 mm
(/2") ID hoses and standard (ASAE/SAE/ISO)
couplers .
5 . Hydraulic motors greater than 0 .63 L/SEC
(0 GPM) should be connected with (3/4")
hoses and (ASAE/SAE/ISO) couplers to prevent
excessive restriction and heat generation .
6 . It is recommended to use the low pressure return
line to reduce back pressure in the remote hydraulic
return line which will result in more efficient
hydraulic motor operation . The low pressure return
circuit can also be used in applications where low
return oil pressure is desired to improve implement
operation such as with orbit motor case drain lines,
or implement mounted hydraulic control valves .
Operating remote equipment simultaneously
or remote equipment and hydraulic lift
simultaneously
NOTE: Hydraulic pump output varies with engine
speed. Oil flow will be relatively constant in the
remote control valve circuits if the flow control is used
to provide reduced oil flow, thus providing constant
operating speed for hydraulic motors, etc. even if
engine speed varies. Maintain the engine speed above
the minimum required for simultaneous operation of
all required circuits and vary ground speed by selection
of the appropriate gear.
If operating two or more remote control valves
simultaneously or remote valves and hydraulic lift, all
the flow control knobs should be adjusted to provide
a partial flow . Otherwise, all the available flow may
be directed to the full flow circuit when the pressure
in that circuit is less than that of the other circuits in
use .
Bleeding Remote Cylinders
When connecting a cylinder with trapped air, i .e . a new
cylinder, one that has been out of service or one that
has had the hoses disconnected, it will be necessary
to bleed the cylinder to remove the air .
With the hoses connected to the remote control valve
couplers at the rear of the tractor, position the cylinder
with the hose end uppermost and extend and retract
the cylinder seven or eight times using the remote
control switch . Check the hydraulic oil tank level
before and after operating the remote cylinder .
Section 3 - Operation
Hydraulic Operation - Electro-hydraulic