Westerbeke 38B FOUR Manual do Operador Página 26
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Propeller Shaft
Coupling
The propeller shaft coupling fitted
to
the transmission's output flange must transmit not only the power of
the engine
to
turn the propeller shaft and propeller, but must also transmit the thrust of the engine/transmis-
sion either ahead
or
astern.
The coupling bore should be carefully machined for a slight forced fit onto the shaft and an accurate mating
surface for the coupling
to
the output flange
of
the transmission.
For all engine models, a propeller half-coupling, bored
to
shaft size for the specific order,
is
supplied. The
coupling either has a keyway with set screws or
is
of
the clamping type.
The forward end
of
the propeller shaft has a long straight keyway. Any burrs should be removed from the
shaft's end. The coupling should be a light drive fit on the shaft and the shaft should not have to be scraped
down or filed in order
to
get a fit. It
is
important that the key be properly fitted both to the shaft and
to
the
coupling. The key should fit the side of the keyway closely, but should not touch the
top
of
the keyway in
the hub
of
the coupling.
If
driving the coupling over the shaft
is
difficult, the coupling can be expanded by heating it in a pail of boil-
ing water. The face
of
the propeller coupling must be exactly perpendicular
to
the centerline or axis
of
the
propeller shaft.
Propeller
The type and size
of
propeller varies with the gear ratio and must be selected
to
fit the application, based
upon boat tests. To utilize the full power of the engine, and to achieve
ideal loading conditions, use a propeller
which will permit the engine to reach its
full rated
RPM
at full throttle while under a normal load and while it
is
moving the boat forward through the waler.
Alignment
of
the
Engine
The engine must be exactly aligned with the propeller shaft
in
the proper fashion.
No
matter what material
is
used
to
build a boat the material will be found
to
be flexible to some extent; hence, the boat's hull will
change its shape
to
a greater extent than is usually realized when the boat is launched and operated
in
the
water. Therefore,
it becomes extremely important to check the engine's alignment at frequent intervals and
to
correct any errors when they appear.
Misalignment between the engine and the propeller shaft often creates serious
problems which are often
blamed on other areas suspected of causing the trouble. Misalignment will cause excessive bearing wear,
rapid shaft wear and will,
in
many cases, reduce the
me
of
the boat's hull by loosening the hull's fastenings.
A bent propeller shaft
will have the exact effect as those just stated; therefore, a perfectly straight propeller
shaft is
absolutely necessary. One particularly annoying result
of
misalignment may be leakage of transmis-
sion oil through the transmission's rear oil
seal. If oil
is
leaking from this seal, check and make sure that the
coupling's
alignment
is
within the limits prescribed on page
25.
Never attempt a final alignment with the boa! on land. The boat should be in the water and have had an op-
portunity
to
assume its final water form. The best lime
to
perform the propeller shaft/transmission coupling
alignment
is
with the fuel and water tanks about half full and all the usual equipment on board, and after the
main mast has been stepped and the
final rigging has been accomplished.
Westerbeke
Diesel
Engines
24
- WESI'ERBEKE 1
- SAFETY PRECAUTIONS 2
- 1 Westerbeke Diesel 3
- . 4
- Diesel Engines 5
- Marine Diesel Engine 10
- Lift pump 11
- Oil Fill 12
- 90° Exhaust Elbow 12
- THREE MARINE DIESEL ENGINE 14
- GENERAL SPECIFICATIONS 14
- 6 ft (1.8 m) 15
- + 000 - 100) at full open 16
- + 000 - 100) at full open 19
- ± 0.5' BTDC (Static) 21
- AlnIl:Nan:~~~~~B~~==~' 23
- Rigging and 24
- Engines 24
- Westerbeke Diesel Engines 27
- Exhaust System 28
- ." 29
- * Manufactured 31
- + ) battery connection 34
- 190' 35
- Westerbeke 38
- 30 seconds at a time 41
- Break-In 43
- FITTING 45
- Iills. Prevent 46
- ,-----/---€,i\l--\ 49
- ----+fT 50
- ,----:---"1;" 51
- ~1l1)~,i 52
- 1'1 53
- FUNCTION 55
- MANIFOLD 55
- PRESSURE 55
- '1 56
- : i: ' 56
- REPLACE 57
- IMCOMING 59
- Crankcase 64
- NEUTRAL 66
- "j/ 68
- I I i 69
- 10-13/10-14 70
- Starling the Engine 71
- Shifting 71
- Freewheeling 71
- Cooling Problems 72
- Annual Checks 73
- Daily Checks 73
- Winter Checks 73
- General Checks 73
- Walter V-Drives 75
- RV'IO 76
- ~/LOCKING 77
- "H" 78
- Maintenance 79
- I terminal on the 81
- + and - ground 82
- + 140 psi 86
- W 42B FOUR Engine) 87
- ADJUST VALVES 88
- ~'"'' 89
- 50-50 solution 91
- 38B, and page 19 for 91
- Batleries 93
- 4. Check the condition 94
- QapSQ[9W 95
- A Starter 97
- Weslerbeke Diesel Engines 100
- YOUR NOTES 104
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