Kubota L4474, Operator And Parts Manual

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MAINTENANCE
OM 0427SBC-A 29
PROBLEM: HYDRAULIC CHUTE ROTATION IS SLOW OR DOESN'T TURN
When activating the chute rotation, it turns very slowly or not at all.
WARNING
To avoid serious personal injury
,
always wear safety glasses while doing
the instructions below.
1. Check if the tractor valve works well.
Test it by plugging another equipment to
the valve. If it does not work well, refer to
the appropriate operator's manual.
2. Figure below: Check if the chute itself
rotates well. To do so, remove the 1/4" x
1" hex bolt (item 1), 1/4" lockwasher
(item 2), 1/4" flat washer (item 3), the
motor gear (item 4) and the two 12mm
flat washers(item 6), attached to the
motor shaft (item 5) and check if the
chute rotates well in both directions by
turning it by hand. If it does not rotate
well, correct the problem by checking if
there is some excess wear or debris
locked between components.
3. Figure below: Check if there are residues in the
hydraulic circuit. To do so, first verify if the chute
rotates well in one direction. If so, remove the
1/4" x 1" hex bolt (item 1), 1/4" lockwasher
(item 2), 1/4" flat washer (item 3), the motor gear
(item 4) and the two 12mm flat washers(item 6),
attached to the motor shaft (item 5) and activate
the rotation in the direction the motor turns well
for approximately 1 minute to evacuate the
residues. Then rotate the chute in the direction it
did not turn well and check if the problem is
resolved. If no residue is present, disconnect
hoses and clean them with compressed air. - If
the problem persists, clean with compressed air
the inside of the two motor inputs holes. You can
also turn the motor shaft in both directions while
shooting compressed air.
IMPORTANT : When removing connectors,
always make sure to install the plugs and caps
on the hoses and tractor valve connectors. This
will prevent contamination of the hydraulic
circuit and obstruction of the flow restrictor hole
.