Westerbeke 38B FOUR Betreibershandbuch PDF herunterladen (Seite 27)

Take plenty of time in making this alignment and

not be

satisfied with anything

less than perfect results.

The alignment is correct when the shaft can

easily

slipped backward and forward into the counterbore, and

when a feeler gauge indicates that the flanges come

together at

all points. The alignment between the propeller

shaft coupling and the engine's coupling can contain an

error

greater than one thousandth

inch per inch of

the coupling diameter. For example, if your propeller shaft

coupling

three inches in diameter, the maximum error

that can be allowed in the

alignment is three thousandths

of an inch (.003).

making the final check for alignment, the

engine's half

coupling should be held in one

position and the

alignment with the propeller

coupling

tested with the propeller coupling in

each

four positions

(A),

while rotated

90'

be-

tween each

pOSition.

This test will also check

whether the propeller's

half-coupling is in exact

alignment on

its shaft. Then, keeping the

propeller coupling in one position, the align-

ment

should be checked

rotating

the

engine's

half-coupling

90'

increments,

checking dimension

A while in each

90'

posi-

tion until the half-coupling has been rotated full

circle.

The engine's alignment should be rechecked

after the boat has been

service for one

three weeks and, if necessary, perform the

alignment again. Usually it will be found that

the engine

longer in alignment. This does

not mean that the work has been done im-

properly at first; rather,

means that the boat

has taken some time

take its final shape and

that

the

engine's bed and stringers have

probably absorbed some moisture.

It may

even be necessary

realign the coupling hal-

ves

again at a later time.

.B93

FEELER

GAGE

PROPELLER

SHAFT

Westerbeke Diesel Engines

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