Westerbeke 38B FOUR Manual del operador Pagina 50
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Thermostat
Generally, thermostats are
of
two
types. One is simply a choking device which opens and closes
as
the
engine's temperature rises and falls. The second type has a bypass mechanism. Usually, this is a disc on
the bottom
of
the thermostat which moves downward to close off an internal bypass passage within the
head.
Since 1980, each type
of
thermostat has a hole punched through it. The hole is a bypass
to
prevent
the exhaust manifold from overheating during the engine's warm-up. Replacement thermostats
must
have this design characteristic.
Raw
Water
Circuit
The raw water flow is created
by
a gear-driven, positive displacement, neoprene impeller pump. The
pump draws raw water directly from the ocean through the sea cock and raw water strainer and passes the
water to the heat exchanger's raw water inlet. The raw water passes through the heat exchanger's tubes,
from which heat from the fresh water system that circulates around these tubes is absorbed, and then the
raw water is discharged from the cooling system overboard through the water-injected wet exhaust system.
Be sure to clean zinc debris from the area inside
of
the heat exchanger where the zinc anode is positioned
as this debris lays in front
of
these tube ends and blocks them.
Zinc Anode
A zinc anode, or pencil, is located in the raw water cooling circuit within the heat exchanger. The
purpose of the zinc anode
is
to
sacrifice itself to electrolysis action taking place in the raw water cooling
circuit, thereby reducing the effects of electrolysis on other components
of
the system. The condition
of
the zinc anode should be checked monthly and the anode cleaned or replaced as required. Spare anodes
should be carried on board.
NEIf
ANODE
REPLACE
REPLACE
CLEAN
DR
REPLACE
NOTE: Electrolysis action is the result of each particular installation and vessel location; not that
of
the generator.
If
the zinc pencil needs replacement, hold
the
hex boss into which the zinc pencil is threaded with a
wrencb while loosening the anode with another wrencb. This prevents the hex boss from possibly
tearing off the exchanger shell. After removing the zinc, note the condition
of
it.
If
the zinc is in poor
condition, there are probably a lot of zinc flakes within the exchanger. Remove the end
of
the heat
exchanger and clean the inside
of
all zinc debris. Always have a spare heat exchanger end gasket in
case the present one becomes damaged when removing
the
end cover. Replace the gasket (refer to
your engine model's heat exchanger end gasket part number), cover, and install a new zinc pencil.
WESTERBEKE GENERATORS
46
- WESTERBEKE 1
- • Avoid Moving Parts 4
- FOREWORD 6
- 'c~~ 7
- 5 WESTERBEKE GENERATORS 9
- Shut~off 11
- Dimensions 13
- BTD SYSTEM 14
- ELECTRICAL 15
- ACGENERATOR 15
- EMISSION CONTROL SYSTEMS 16
- CAUTION 17
- Lifting 18
- Rigging 18
- I WARNING I 20
- 21
- /Exhaust 21
- ~===14f.;;;1 22
- #037401 23
- Fl...ANGE 23
- WARNING 27
- WESTERBEKE GENERATORS 24 28
- PREHERT 29
- GENERRTOR 29
- I ' 30
- " 31
- JJ.I,.--SHAFT 32
- PREPARATION 33
- STARTING 33
- WESTERBEKE GENERATORS 38
- ~2' 40
- ---'~ 41
- Battery Specification 42
- 0" 43
- :,'( 44
- '''-'j 45
- W SWITCH 46
- Fresh Water Circuit 47
- FUNCTION 48
- MANIFOLD 48
- PRESSURE 48
- REPLACE 50
- SCREWORIVER 51
- "A"nAA'" 52
- I' 53
- ;' 53
- 'l'..J 54
- BT GENERATOR 55
- Securing 56
- : , Btl 57
- Generator Frequency 58
- Load Connections 58
- WESTERBEKE GENERATORS 54 58
- '-1 59
- ~' 60
- An electric motor connected 61
- 59 WESTERBEKE GENERATORS 63
- 3. Check that 64
- * ) are recommended to be 67
- * ) should be performed 68
- A®~f"t4a;::;r 69
- Timing mark 70
- DELIYEiY 71
- DELIVERY 71
- Adjustments (Generator) 72
- Generator 72
- Frequency Adjustment (Hertz) 72
- #037100 73
- #034569 73
- Starter 76
- Cylinder Lubrication 76
- 'U 77
- ± 10/0 kglcm 79
- ± 140/0) 79
- An impeller kit 80
- A starter 80
- ,"' 83
- TII_IlM_ 83
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