Westerbeke 20B TWO Manual de instalación descargar pdf (Pagina 51)

ENGINE

ADJUSTMENTS

NOTE:

WESTERBEKE recommends that the following engine

adjustments be peiformed by a competent engine mechanic. The

information below

is provided

assist the mechanic.

VALVE

CLEARANCE

ADJUSTMENT

(CONT.)

5. When setting TDC for the No.2 cylinder (or the No.3

cylinder for the

30 B/C Three), proceed as

follow~:

a. For the 20 B - two engine (2 cylinder) from TDC for

the No.1 cylinder, rotate the crankshaft

180° clockwise

(as viewed from the front

the engine) and adjust the

valve clearances for both the intake and exhaust valves

for the No.2 cylinder.

For the 30 B/C Three engine

cylinder) from TDC

for the No.1 cylinder, rotate the crankshaft

240°

clockwise (as viewed from the front

the engine) to

position the No.3 cylinder at

TDC. Adjust the valve

clearances for both the intake and exhaust valves for

the No.3 cylinder.

Rotate the crankshaft another

240° clockwise to

position the No.2 cylinder at TDC Adjust the

valve

clearances for both the intake and exhaust valves for

the No.2 cylinder.

MARK

PULLEY

Injection

Pump

Timing

Adjustment

(Spill

Timing)

The shut -off lever (throttle) must be in the run position and

the throttle fully open while making these adjustments or no

fuel will flow to the injection pump.

Remove the cylinder glow plugs to

allow the engines

crankshaft to be easily rotated.

1. Remove the high pressure fuel line from between the

No.1 injector and the No.1 fuel delivery

valve holder.

2. Remove the No.1 fuel delivery valve holder over the

"0"

ring and remove the delivery valve spring beneath

the holder.

3. Reinstall only the delivery

valve holder and re-attach the

high pressure fuel line to the delivery holder. Attach it so

that the end that would connect to the fuel injector

pointing away from the engine. Fuel will flow from this

line during the timing check.

Rotate the engine's crankshaft in its normal direction

rotation to position piston No.1 at the beginning

its

compression stroke.

Move the throttle lever to its 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

19°

BTDC timing mark on the

crankshaft pulley should be directly aligned with the timing

indicator on the front

the gear case ±

degrees.

the specified injection timing (19oBTDC) can not be

attained, adjust the timing by increasing or decreasing the

thickness

shim matetial under the injection pump's

mounting flange to change the injection timing point.

Changing the shim thickness by

0.004in (O.Olmm) changes

the injection timing by approximately one degree.

advance the timing, decrease the shim thickness,

required.

retard the timing, increase the shim thickness, as required.

DELIVERY

VALVE

FUEL

INJECTION

PUMP

Engines & Generators

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Westerbeke 20B TWO Manual de instalación Pagina 51

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