Etesia HYDRO 124D, Technical Training Manual

Page: 13 / 79

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Breakdowns and their possible causes.
The table below indicates various breakdowns liable to occur during use of the engine and their possible causes.
It is absolutely vital that the simplest checks be systematically made before any dismantling or replacement work.
Some of these anomalies may also be due to elements of the H124D ride-on mower (for example : will not start
due to the absence of one or more safety conditions …)
BREAKDOWN
POSSIBLE CAUSES
T
h
e
e
n
g
in
e
d
o
e
s
n
o
t
s
ta
rt
T
h
e
e
n
g
in
e
s
to
p
s
s
o
o
n
a
ft
e
r
s
ta
rt
in
g
It
d
o
e
s
n
o
t
a
c
c
e
le
ra
te
Ir
re
g
u
la
r
ru
n
n
in
g
B
la
c
k
s
m
o
k
e
c
o
m
e
s
o
u
t
o
f
th
e
e
x
h
a
u
s
t
W
h
it
e
s
mo
k
e
c
o
m
e
s
o
u
t
o
f
th
e
e
x
h
a
u
s
t
O
il
p
re
s
s
u
re
t
o
o
l
o
w
In
c
re
a
s
e
i
n
o
il
le
v
e
l
O
il
c
o
n
s
u
m
p
ti
o
n
t
o
o
h
ig
h
O
il
le
a
k
o
n
e
x
h
a
u
s
t
m
a
n
if
o
ld
A
b
n
o
rm
a
l
h
e
a
ti
n
g
o
f
c
o
o
la
n
t
Pipes clogged
Fuel filter clogged
Presence of air in the fuel pipes
Fuel tank air drain hole clogged
Defective diesel pump
Injector blocked
Injection pump valve blocked
Injector badly calibrated
Significant leak at plunger (injector)
Rack (link rod) of injection pumps difficult to
manoeuvre
S
U
P
P
L
Y
C
IR
C
U
IT
Injection pump incorrectly adjusted
Oil level too high
Oil pressure regulator valve stuck
Oil pump worn
Presence of air in the oil inlet pipe
Pressure indicator or transmitter defective
L
U
B
R
IC
A
T
IO
N
Oil inlet pipe clogged
Heater plug fuses blown
Heater plug electronic control defective
Battery empty
Cable connections defective or loose
Keyed ignition switch defective
E
L
E
C
T
R
IC
A
L
C
IR
C
U
IT
Starter defective
Air filter clogged
Speed too high
Run-in not finished
M
A
IN
T
E
N
A
N
C
E
Engine overloaded
Injection starts too soon
Injection starts too late
Acceleration lever incorrectly adjusted
Regulator spring unhooked or broken
Idling too low
Piston rings worn or clogged
Cylinders worn
Valve guides worn
Valves blocked
Crankshaft or connecting rod bearings worn
Speed regulator rack (rod) difficult to manoeuvre
Crankshaft turns with difficulty, stuck
Cylinder head gasket damaged
Injector-pump rack (rod) loose
A
D
J
U
S
T
M
E
N
T
S
/R
E
P
A
IR
S
Injection timing incorrect