Westerbeke 38B FOUR Manual do Operador descarregar pdf (Página 90)

Injection

Pump

Timing

Adjustment

(Spill

Timing)

If your engine's fuel injection timing is not property adjusted, the engine will not operate property and will be

difficult

start. Have the injection pump delivery rate checked by a well-established fuel Injection shop. Ad-

just the injection timing as follows:

NOTE: The fuel shut-off lever must be

the RUN posHion while making the adjustment or

fuel will flow from the fuel injection pump.

Refer

the illustration below when servicing the fuel injection pump. First remove the high-pressure fuel

line from between the No.1 injector and the

No.1

fuel delivery valve holder. Remove the NO.1 fuel delivery

valve holder and remove the delivery valve spring beneath the holder. Reinstall only the delivery valve holder

and re-attach the high pressure fuel

line

the delivery holder. Attach H so that the end that would connect

the fuel injector

pointing away from the engine. Fuel will flow from this line during the timing check.

Rotate the engine's crankshaft in

normal direction

rotation

posi-

tion piston No.1 at the beginning

its compression stroke

Move the throttle lever

full open

position and operate the electric lift

pump.

Slowly rotate the crankshaft

clockwise

(as

viewed

from

the

front), catching the fuel from the No.

1 fuel

line, until the Instant the fuel

completely stops flowing (no drips).

At this instant, the

BTDC timing

mark

the

crankshaft

pulley

should be directly aligned

wHh

the

timing indicator on the front of the

gear case (refer

the illustrations

on pages 86 and 87).

DELIVERY

VALVE

HOLDER

DELIVERY

VALVE

SPRING

DELIV

VALVE

BAR

R E L

'-::::"':17'TtJt;1

PLUNGER

CONTROL

PINION

PLUNGER

SPRING

7';I"'-::'-~-CONTROL

RACK

TAPPET

If the specified injection timing

(23

BTDC) cannot

attained, adjust the timing

increasing or decreas-

ing the thickness

shim material under the injection pump's mounting flange to change the injection timing

point. Changing the shim thickness

0.004 inch

(0.01

mm) changes the injection timing

approximately

one degree. To advance the timing, decrease the shim thickness, as required. To retard the timing, increase

the shim thickness, as required. Refer

your engine's Parts List for shim part numbers.

Weslerbeke

Diesel

Engines

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 107 108

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Westerbeke 38B FOUR Manual do Operador Página 90

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