Shibaura TF516MH-AB, Owner'S Manual

Page: 34 / 40

32
5. Troubleshooting
Symptom Cause Remedy
W
a
te
r s
u
ct
io
n
im
p
ro
p
e
r
Det
e
ri
o
ra
tio
n
o
f s
uc
tio
n
f
un
ct
io
n
Vacuum
leakage (water
flow
discontinues at
engine stop)
1.
Air is sucked on account of poor
tightening of suction pipe
2.
Mechanical seal is faulty
3.
Vacuum pump cock leaks
4.
Casing rubber packing is faulty
5.
Water discharge valve rubber is
worn or clogged with contaminants
6.
Pressure gauge or compound gauge
pipe is broken or not tightened
securely
7.
Water suction lever position is
Improper
1.
Tighten securely
2.
Replace
3.
Check and repair
4.
Replace
5.
Replace or clean
rubber
6.
Replace or
retighten
7.
Return lever to
stop position
No vacuum
leakage
1.
Vacuum pump inside is damaged or
worn
2.
Vacuum pump operation time is
short
3.
Engine speed is low
4.
V belt slips
5.
Vacuum pipe or strainer is clogged
6.
Suction strainer is clogged
7.
Suction head is large
1.
Check and repair
2.
Prolong operation
time
3.
Adjust to standard
speed
4.
Adjust or replace
5.
Clean
6.
Ditto
7.
Reduce to within 8
m
Im
p
ro
p
e
r
wat
e
r d
is
ch
a
rg
e
Dos
e
n
o
t
ris
e
to
s
p
e
ci
fie
d
p
re
ss
u
re
Engine is
abnormal
1.
Output is poor
2.
Throttle is maladjusted
3.
Overload
4.
Overheat
1.
Repair engine
2.
Adjust
3.
Change nozzle
diameter
4.
Decrease load or
adjust engine
Pump proper
is abnormal
1.
Suction pipe strainer is clogged with
contaminants
2.
Impeller or casing is clogged with
foreign matters
3.
Suction head is large
4.
Pressure gauge is faulty
5.
Air is sucked from suction pipe
6.
Inducer or impeller is loose
7.
Frozen inside
8.
Foreign matters are in casing
1.
Eliminate
2.
Eliminate foreign
matters
3.
Reduce to within 8
m
4.
Replace
5.
Retighten
6.
Retighten
7.
Thaw
8.
Eliminate