Yanmar 3JH3E - 2. Sea Water Pump; 2-1 Specifications of sea water pump; 2-2 Sea water pump disassembly; 2-3 sea water pump Inspection

Chapter 6 Cooling Water
System
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3,4JH3(BXC)E
2.
Sea water pump
A-A
A-A
6
2-1
Specifications
of
aea water pump
1 . Performance
Flow
Seltpriming
ability
Thightness
test
2.
Durability
Impeller
Flow
drop
Leakage from
seal
Llpseal, water
Lipseal,oil
Endcover,
wear
plate
Other parts
Printed
in
Japa.a
HINSHI-H8009
min 3800
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pin=-0.05
bar
pout=0.95
bar
n=3250rpm
after1500h
duty
max
10
s
al
suctionhead=0.Sm
length o!
pipe=0.6m
n=500rpm
4bar
min1500h
max10%
after
1000h
max3cc/h
1000h
3000h
min3000h
min6000h
6-3
2-2
Sea water pump disassembly
{ 1)
Remove
the rubber hose from
the
sea
water
pump
outlel and then the sea water pump assembly from the
gear case.
(2) Remove
the
sea water pump cover and take out
the
O-ring, impeller and wear plate.
(3) Remove the mechanical seal side stop ring.
(4} Insert pliers from
the
drive gear long
hote
and remove
the stop ring that holds the bearings.
(5) Lightly tap the pump shaft from the impeller side and
remove the pump shaft, ooarings, and drive
gear
as a
set
(6)
Remove the oil seal and mechanical seal
if
necessary.
2-3 Sea water pump Inspection
(
1)
Inspect
the rubber impeller, checking
for
splitting
around the outside, damage or cracks, and replace
if
necessary.