SERVICE MANUAL A-ERGO
SERVICE MANUAL A-ERGO
8.
8.38
38
Hy
Hydr
drau
auli
lic s
c sys
ysttem /
em / Di
Diag
agno
nosi
sis a
s and
nd tr
trou
oubl
ble s
e sho
hoot
otiing
ng / S
/ Sym
ympt
ptom
om an
and A
d Act
ctiion
on
Diagnosis and trouble shooting
Diagnosis and trouble shooting
Symptom and Action
Symptom and Action
A number of fault symtoms have been listing in the table below with a
A number of fault symtoms have been listing in the table below with a number of possible
number of possible
faults and repair procedures. It is therefore
faults and repair procedures. It is therefore possible that other faults not listed can occur.
possible that other faults not listed can occur.
Table 8.5
Table 8.5
S
Sy
ym
mp
ptto
om
m
P
Po
ossssiib
blle
e
ffa
au
ulltt
A
Accttiio
on
n
The lift motor runs but
The lift motor runs but
the fork carriage does
the fork carriage does
not lift.
not lift.
The lowering valve has
The lowering valve has
jammed and is open.
jammed and is open.
1.
1. Cl
Clos
ose th
e the v
e val
alv
ve.
e.
2.
2. Adju
Adjust, or
st, or remo
remove an
ve any di
y dirt in
rt in the
the
valve.
valve.
The lift motor runs but
The lift motor runs but
the fork carriage lifts
the fork carriage lifts
very slowly.
very slowly.
Th
The m
e mach
achine
ine is
is ov
overl
erload
oaded.
ed.
Li
Light
ghten
en th
the l
e loa
oad.
d.
The overflow valve is
The overflow valve is
defective.
defective.
Adjust the valve to the rated weight.
Adjust the valve to the rated weight.
An object has partially
An object has partially
blocked hoses, hydraulic
blocked hoses, hydraulic
pipes or valves.
pipes or valves.
Dismantle and clean.
Dismantle and clean.
A hydraulic hose has been
A hydraulic hose has been
clenched.
clenched.
Rearrange the hose and clamp it
Rearrange the hose and clamp it
secure.
secure.
The lift motor emits a
The lift motor emits a
screeching noise just
screeching noise just
before the fork carriage
before the fork carriage
reaches the top.
reaches the top.
The oil level is too low in the
The oil level is too low in the
hydraulic tank.
hydraulic tank.
1.
1. Fil
Fill up
l up with
with hyd
hydraul
raulic o
ic oil.
il.
When the tank is almost full, try
When the tank is almost full, try
with 0.1 litre at a time to avoid
with 0.1 litre at a time to avoid
overfilling.
overfilling.
2.
2. Fin
Find ou
d out th
t the reas
e reason f
on for t
or the lo
he low
w
level, and rectify the fault.
level, and rectify the fault.
The fork carriage
The fork carriage
cannot be lowered.
cannot be lowered.
V
Valve does
alve does not open on
not open on
return because of object in
return because of object in
the system.
the system.
Dismantle the valve and clean.
Dismantle the valve and clean.
The hose rupture valve is
The hose rupture valve is
closed because the lowering
closed because the lowering
speed is too high.
speed is too high.
Limit the lowering speed.
Limit the lowering speed.
The hose rupture valve is
The hose rupture valve is
closed because the spring in
closed because the spring in
the valve is defective.
the valve is defective.
Replace the hose rupture valve.
Replace the hose rupture valve.
The fork carriage
The fork carriage
lowers too
lowers too slowly.
slowly.
The lowering valve or
The lowering valve or
lowering brake valve is dirty
lowering brake valve is dirty
or defective.
or defective.
1.
1. Run t
Run the mo
he motor at f
tor at full po
ull power fo
wer for 1
r 1
minute to see if the dirt is
minute to see if the dirt is
released.
released.
2.
2. If no
If not, d
t, disman
ismantle
tle the
the valv
valve an
e and
d
clean it, or alternatively replace
clean it, or alternatively replace
defective parts.
defective parts.
The oil filter is blocked and
The oil filter is blocked and
dirty
dirty
Replace filter.
Replace filter.
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