Kubota M4N-071, Operator'S Manual

Page: 90 / 152

the end of the stroke, as this will cause oil to
flow through the relief valve. Forcing oil
through the relief valve for extended periods
will overheat the oil.
NOTE :
• Connect the pressure of load side of implement
cylinders to ports (B), (D), (F), (H) or (J) which
have built-in load check valves to prevent
leakage.
• To use the single-acting cylinder with the float
valve, connect this cylinder to the (B), (D), (F),
(H) or (J) port.
To extend a single-acting cylinder, pull the
remote control valve lever rearward. To retract a
cylinder, push it fully forward to the “FLOAT”
position. Do not hold it in the down position or
the transmission fluid may overheat.
3. Remote control valve coupler
WARNING
To avoid personal injury or death:
• Stop the engine and relieve pressure before
connecting or disconnecting lines.
• Do not use your hands to check for leaks.
Connecting
1. Clean both couplers.
2. Remove dust plugs.
3. Insert the implement coupler into the tractor
hydraulic coupler.
4. Pull the implement coupler slightly to make sure
couplers are firmly connected.
Disconnecting
1. Lower the implement to the ground to release
hydraulic pressure from the hoses.
2. Clean the couplers.
3. Relieve pressure by moving hydraulic control levers
with engine shut off. Pull the hose straight from the
hydraulic coupler to release it.
4. Clean oil and dust from the coupler, then replace
the dust plugs.
NOTE :
• Your local KUBOTA Dealer can supply parts for
adapting couplers to hydraulic hoses.
4. Controlling and adjusting the flow
rate
WARNING
To avoid the possibility of personal injury or death
be aware of the following when making
adjustments:
• The 3-point hitch operation is influenced by the
combination of the adjustment of the flow
control valve and the engine speed.
• The 3-point hitch may rise slowly or not at all at
low engine rpm.
• The 3-point hitch may rise suddenly if engine
rpm is increased, or, flow control adjustment is
changed.
Flow control
The remote control valve with flow control may be
added for the following purposes.
1. The attachments that are connected with the
auxiliary control valve can be independently
adjusted for flow rate.
2. To operate within limits, the remote control valves
(1) and/or (2) and the 3-point hitch at the same time
without one affecting the other.
3. To maintain within limits, the constant speed of an
attachment (hydraulic motor RPM, for example)
when connected to the remote control valves (1)
and/or (2).
NOTE :
• At slower engine speeds the total hydraulic
flow rate may be inadequate for
simultaneous operation of the remote
control valves (1) and/or (2) and the 3-point
hitch, or operation of an attachment
connected to the remote control valves (1)
(2). Under these conditions, the engine
speed must be increased to provide
additional hydraulic flow.
HYDRAULIC UNIT REMOTE HYDRAULIC CONTROL SYSTEM
84
M4N-071, M5N-091, M5N-111