Komatsu PC58UU-3, Руководство по ремонту

Страница: 379 / 528

TROUBLESHOOTING H-MODE
20-504
PC58UU-3
1
H-MODE
TABLE OF FAILURE MODES AND CAUSES
Parts causing failure
Failure mode
E
n
g
in
e
sy
ste
m
Da
mp
e
r
Tank Hydraulic pump Control valve
Hyd
rau
lic o
il
Ca
p
St
ra
in
e
r
Pi
s
ton p
um
p
P
C
val
ve
LS
v
a
lv
e
LS
b
y
p
a
s
s
c
h
ec
k
valv
e
EP
C va
lv
e
S
e
rv
o pi
s
ton
Or
if
ice
Ge
ar
p
u
m
p
Co
nt
rol
pu
m
p
LS
l
in
e
th
ro
tt
le
Sp
ool
P
re
ssu
re
co
m
p
en
sat
io
n
v
a
lv
e
L
S
by
pa
s
s
t
hr
ot
tl
e
Un
lo
ad
va
lve
Work equip-
ment, travel,
swing, and
blade
Speed of all work equipment, swing, travel, are slow or lack power
● ● ● ● ● ● ●
There is excessive drop in engine speed, or engine stalls
● ● ● ● ● ●
Two or more of work equipment, travel, swing, or blade do not move
● ● ● ● ● ● ●
Abnormal noise generated (around pump)
● ● ● ● ● ●
Fine controllability is poor or response is low
● ● ● ● ● ●
Work equip-
ment
Speed is slow or lacks power
Boom
● ●
Arm
● ●
Bucket
● ●
Offset
● ●
Work equipment does not
move
Boom
● ●
Arm
● ●
Bucket
● ●
Offset
● ●
Excessive hydraulic drift
Boom
●
Arm
●
Bucket
●
Offset
●
Excessive time lag (Engine speed is low)
In compound operations, work equipment with larger load is slow
●
Travel
Excessive travel deviation
● ● ●
Travel speed is slow or lacks power
● ● ●
Machine cannot be steered sharply or steering force is insufficient
● ● ●
Travel speed does not change
Machine does not travel
● ● ●
Excessive overrun of travel
●
Excessive travel hydraulic drift
Fine controllability is poor or response is low
● ● ●
Swing
Swing speed is slow or lacks power
●
Machine does not swing
●
Swing acceleration is poor
●
Excessive overrun of swing
Excessive shock is made when machine stops swinging
●
Excessive abnormal noise is made when machine stops swinging
Excessive hydraulic drift of swing
Fine controllability of swing is poor or response is low
●
Blade
Blade speed is slow or lacks power
●
Blade does not move
●
Excessive hydraulic drift of blade
●
Fine controllability of blade is poor or response is low
●
Prevention of
interference
Monitor panel displays error code [61] and all operations stop just before
interference
Machine does not stop boom RAISE, arm IN, and LEFT offset operations auto-
matically but interferes