Westerbeke BCD 4.4KW Betreibershandbuch PDF herunterladen (Seite 74)

Valve Clearance Adjustment: BCD 6.0KW

CAUTION

Adjust the valve clearance when the

engine is cold. Valves are adjusted

cylinder

the firing order

the en-

gine.

Tighten the

cylinder head bolts

the

specified torque before adjusting the

valves. (See page 69.)

TDC

MARK

Pull off the air breather pipe from the rock-

Y 1 i n d e r

er cover, and take off the rocker cover No _ 3 )

bolts and the rocker cover.

Adjust the valve clearances at TOC (Top

Oead Center)

for

each cylinder when they

are

their

compression stroke (see

TDC

MRRK

(

Cylinder

No.ll

TDC

MRRK

(Cylinder

No.2)

below). Remember the engine's firing order is 1-3-2. You may find that turning the engine's crankshaft

more easily accomplished when the engine's glow plugs are removed before the crankshaft is rotated.

Align the timing mark on the gear case with the timing mark on the crankshaft pulley indicated for cylinder

No.1

(the one next

the three injection timing marks). In this position, the

No.1

cylinder is at its top

Timing Markwhile dead center on its compression stroke. Check both intake and exhaust valve clearan-

ces

for

this cylinder. If the valves have

specified clearance, adjust

means

the adjusting screws.

Remember

align the timing marks properly; if not, the valve may be pushed

the piston, depend-

ing on the position

the cam lobe. Be sure

check the valves for this cylinder - they both should be

closed.

Next the

No.3

cylinder: Turn the crankshaft clockwise 240

so the TOC mark

for

the NO.3 cylinder, on

the front crankshaft

pulley, is approximately at the position shown in the illustration above. Now adjust

the intake and exhaust valves for cylinder

No.3.

Be sure

check the valves for this

cylinder - they both

should be closed.

Last is

the

No. 2 cylinder:

Turn

the

crankshaft clockwise another 240

posi-

tion the TOC mark on the crankshaft pul-

ley approximately at the position shown

the illustration shown above.

Now

adjust

the intake and exhaust valves

for

cylinder

No.2.

Be sure

check the valves for this

cylinder - they both should be closed.

Adjust each valve's clearance

inserting a

0.010 inch (0.25 mm) feeler gauge between the

rocker arm and the valve stem.

RDJUST

VRLVES

0.010

INCHES

(0.25

MMJ

Westerbeke Generators

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