Westerbeke W-46 - Page 50

ENGINE ASSEMBLY
FUa INJECTION PUMP
Two styles of injection pumps were used with this engine.
Early - DPA iJ3942F490(PN#034378)
This type had a tapered/keyed drive shaft.
Later - DPA #J 3942F580· (PN#036169)
T~is type had a splined drive shaft with a master spline.
The injection pump is mounted to the engine front plate. It is
secured,to the front plate by three studs with .11-mm hex nuts and
washers.
Inst'alling Early Model Injection Pump (PN#034378)
. ..
a. Rotate engine so as to position keyway in pump drive gear
at 12:00 o'clock.
b. Rotate injection pump drive shaft to position keyway at
12:00 o'clock. Insert woodruff key in keyway.
c. Carefully slide pump onto the engine mounting . flange . and
guide the tapered drive shaft with woodruff key into the
drive gear.
q When drive shaft is positioned in the drive gear, secure
in drive gear by threading raw· water pump drive tang onto the
pump drive shaft protruding from the drive gear.
e. Snug the injection pump up to the front plate with the
three securing nuts and washers. Posit ion the 23 • scribe
mark on the pump flange in line with the scribe on the front
cover. Tighten the three securing nuts.
12:00
I
MOVE FLANGE PLATE SCRIBE MARK
DOWN AS SHOWN ON THE ATTACHED
ILLUSTRATION.
Engines & Generators
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