Manual Boom Lowering Procedure - Kubota KX080-4 Workshop Manual

KX080-4, WSM

[3] MANUAL BOOM LOWERING PROCEDURE

Purpose
• This procedure is used in cases where the accumulator stops working and you have an urgent need to lower the
boom.
Work Procedure
1. With the engine stopped, loosen the shut-off valve nut on the boom lock valve.
2. Loosen the boom lock valve screw 45 degrees (0.79 rad).
CAUTION
• Never get under the boom.
• After lowering the boom, be sure to retighten the screw and nut to their original positions.
• If you overloosen the screw and it comes off, oil will leak out and the boom will drop quickly.
4. Operate each control lever for the boom, arm, bucket and swivel
to full stroke.
5. Operate each of the travel levers, blade levers, swing pedals
and angle blade switches to full stroke.
6. Use the AUX enable switch to turn the AUX ports ON and then
operate each of the AUX port knob switches full stroke.
7. Place the machine's lock lever in the "Lock" position, and the
engine starter switch to the "STOP" position.
8. Loosen the filler port on top of the hydraulic oil tank one half to
a full turn to relieve pressure.
(1) Left machine control lever
(2) Right machine control lever
(3) Travel lever left
(4) Travel lever right
(5) Blade control lever
3-S135
HYDRAULIC SYSTEM
(6) AUX port knob switch
(7) Swing pedal
(8) Angle blade switch (angle spec.
only)
(9) AUX enable switch
RY9212158HYS0096US0
RY9212148HYS0350US0
(1) Nut
(2) Screw
(A) Boom lock valve
RY9212158HYS0105US0
KiSC issued 08, 2015 A