Westerbeke WPDS-20 Manuel de l'opérateur télécharger pdf (Page 8)

Take plenty of time

making this alignment and

not be satisfied wtth anything less than perfect results.

The

alignment is correct when the shaft can be 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 no greater than one thousandth

inch per Inch of the coupling diameter. For ex-

ample, if your

propeller shaft coupling is three inches

diameter, the maximum error that can be allowed

the alignment

three thousandths of

inch (.003).

In making the final check for alignment, the

engine's

half coupling should be held

one

position and the alignment with the propeller

coupling

tested wtth the propeller coupling

each

offour

positions (A), while rotated

90'

be-

tween each position. This test will

also check

whether the propeller's half-coupling

exact

alignment on its shaft. Then, keeping the

propeller coupling

one position, the align-

ment should be checked by rotating the

engine's

half-coupling in

90'

increments,

checking dimension A while

each

90'

posi-

tion until the

half-coupling has been rotated full

circle. .

The engine's alignment should

rechecked

after the boat has been

service for one

three weeks and, if necessary, perform the

alignment again. Usually

will be found that

the engine is no longer

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.

Westerbeke

Diesel

Engines

.093

FEELER

GAGE

PROPELLER

SHAFT

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 113 114

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Westerbeke WPDS-20 Manuel de l'opérateur Page 8

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