Yanmar SA424 - Hydraulic Flow Control;Stop Knob Adjustment

10-3
10. 3-POINT HITCH AND DRAWBAR
SA221/324/424 Operation Manual
■ Hydraulic Flow Control/Stop Knob
(A) Hydraulic flow control/stop knob
(a) Knob turned counterclockwise:
• increases the rate of drop speed
• unlocks the hydraulic lift
(b) Knob turned clockwise:
• decreases the rate of drop speed
Knob turned clockwise until the knob stops turning:
• locks the hydraulic lift
● Lowering the 3-point hitch too fast can lead to
accident or tractor failure.
● Adjust the hydraulic flow control/stop knob:
• the time for lowering the implement from the
highest position to the lowest position, is 2
seconds or longer
● Do not attempt to operate an implement on a
road.
● While the tractor is traveling:
• keep the 3-point hitch control lever in the
raised position
• lock the 3-point hitch control lever with the
position stop knob
• do not fully close the hydraulic flow control/
stop knob
• closing the hydraulic flow control/stop knob
can cause damage to the hydraulic lift
circuit
● During maintenance:
• do not use the hydraulic flow control/stop
knob as a means to keep the implements
raised
• loss of hydraulic pressure may cause the
implement to suddenly drop
• set the implement on solid blocks, or
remove the implement before starting any
maintenance
● The hydraulic flow control/stop knob
determines the speed at which the lower link
is lowered.
IMPORTANT: Avoid damage!
● Avoid attaching a heavy load to the 3-point hitch
when traveling on rough terrain.
• the hydraulic system may be damaged
● Do not operate the 3-point hitch control lever
when the hydraulic flow control/stop knob is
closed.
• the preceding action can cause the
transmission hydraulic oil to overheat
! WARNING
(A)
(b)
(a)
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