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ENGINE

75

Fig. 1

Fig. 2

ADJUSTMENT OF VALVE CLEARANCE

(Cylinder head cover removed, Temperature: cold or

cooling system at maximum 50 deg C)

1 Adjust valve clearance in compression TDC and in

firing order of individual cylinders. Firing order is

1-3-4-2, beginning with first cylinder (starting at

radiator). Fig. 1.

Compression TDC is recognized by the

overlapping valves of counter-cylinder (counter-

cylinders are 1 and 4 or 2 and 3).

EXAMPLE

With valves of 4th cylinder in overlapping position,

valves of 1st cylinder can be adjusted or checked.

TURN ENGINE IN DIRECTION OF ROTATION ONLY.

2 For measuring and adjusting valve clearance, insert

pertinent feeler gauge between valve stem and

rocker arm.

Valve clearance is correctly adjusted, if feeler

gauge can be pulled through under slight

resistance.

3 If a correction of valve clearance is required,

loosen lock nut of ball-head screw. Adjust

clearance by applying screw driver to ball head

screw. Tighten lock nut. Adjust ball head screw in

such manner that feeler gauge can still be moved

smoothly with lock nut tightened again. Fig. 2.

4 Alternatively, valve clearance can be adjusted by

turning crankshaft only twice as follows:

a. Turn crankshaft to bring No. 1 piston at TDC

(compression stroke). To ensure this position

remove clutch housing inspection cover and turn

crankshaft to coincide TDC (red) marking on

flywheel/ring gear with pointer on crankcase.

b. Adjust valve clearance of valve numbers 1, 2, 3 and

5 starting from front end.

c. Turn crankshaft by 360 deg (in direction of

rotation) so as to bring piston No. 4 at TDC

(compression stroke).

d. Adjust valve clearance of valve numbers 1,2,3 and

5 starting from rear end (or 4, 6, 7 and 8 from front

end).

e. Refit clutch housing inspection cover, if removed.