Komatsu PC200-8M0, Руководство по ремонту

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SEN06140-00
PC200, 200LC, 220, 220LC-8M0 40-600
15
600 Troubleshooting of engine (S-mode)
S-8 Oil consumption is excessive (or exhaust smoke is blue)
S-8 Oil consumption is excessive (or exhaust smoke is blue)
General causes why oil consumption is excessive
q
Excessive oil carry-over
q
Long-time operation of engine at low idle or high idle
(Do not idle the engine for more than 20 minutes continuously)
q
External leakage of oil
q
Wear of parts in lubrication system
Cause
Dust sucked in
at air int
a
k
e
system
W
o
rn
/d
amage
d va
lve (ste
m, guid
e,
sea
l)
T
u
rbocha
rger
Clog
ged bre
a
th
er or
b
reather hose
Bro
k
en piston ring
W
o
rn
p
isto
n
ring or cylind
e
r
W
o
rn
o
r da
maged
re
ar o
il
seal
Bro
k
en oil
coo
ler
Oil
l
eakag
e from
oil
coo
ler
Oil
l
eakag
e from
oil
filter
Oil
l
eakag
e from
oil
pi
pin
g
Oil
l
eakag
e from
oil
dra
in
plu
g
Oil
l
eakag
e from
oil
p
a
n, cyli
nder
hea
d, e
tc.
W
o
rn
se
al
at turbi
ne
end
W
o
rn
se
al
at b
lowe
r
en
d
Question
s
Check recent repair history.
Machine operation
hours
Operated for long period
E E E E
Oil consumption suddenly increased.
w Q
Engine oil must be added more frequently.
w Q
Oil becomes contaminated quickly.
Q Q w
Outside of engine is dirty with oil.
w w w w w
Loose hose clamps are found in air intake system.
w
Che
c
k items
Inside of air outlet pipe at turbo compressor side is dirty with oil.
w
Inside of turbo exhaust outlet pipe is dirty with oil.
Q w
Oil in coolant
w
Oil level in damper chamber is increasing.
w
Exhaust smoke is blue under light load.
w w
Amount of blowby gas
Excessive
Q Q w w
None
w
T
rou
blesh
ooting
When intake manifold is removed, dust is found inside.
q
When intake manifold is removed, inside is abnormally dirty.
q
Excessive play of turbocharger shaft
q q
Check breather or breather hose.
q
When compression pressure is measured, it is found to be low.
q q
Check rear oil seal.
q
Pressure tightness test result of oil cooler shows oil leakage.
q q
External leakage of oil from engine
q q q q
Remedy
Re
p
a
ir
Re
p
a
ir
Rep
lace
Rep
lace
Cle
an
Rep
lace
Rep
lace
Rep
lace
Rep
lace
Rep
lace
Re
p
a
ir
Re
p
a
ir
Re
p
a
ir
Re
p
a
ir