Komatsu PC210LC-6 User Manual

TROUBLESHOOTING
H-7
H-7
Boom is slow or lacks power
* When travel and swing speeds are normal
Ir Carry out troubleshooting with the swing priority mode OFF and in the H/O mode.
YI
1
switch for boom
. TreeJ;DGEMENT
. Note:
If auto-deceleration
is canceled when
boom RAISE or
boom LOWER is
operated, system is
normal.
Yl
2
Is output pressure
of PPC (EPC) valve
* Min. 2.74 MPa
(Min. 28 kg/cm21
l Engine at high
idling
n
5
Is relief pressure of
front and rear
pumps normal
when boom RAISE
circuit is relieved?
P
l 31.9 + 1.0 MPa
(325 * 10 kg/cm?
l Engine at high
idling
normal, or does pres-
sure compensation
valve piston move
Does control valve
spool move
smoothly?
l It is also possible to
interchange with
other compensation
valve.
I
After inspection, do
position.
* 4.9 5 219 MPa
(50 + 30 kg/cm2)
. Engine at high
idling
YES
6
Dois LS shuttle
, valve move
H
smoothly?
* Check LS shuttle
:c~R~i. travel and NO
.[ Front is low ]-
yEs [
C
High ]-
NO
C
Low ]-
NO
NO
20-218
a
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Komatsu PC210LC-6 Specifications

General

Brand	Komatsu
Model	PC210LC-6
Category	Excavators
Language	English