Allis-Chalmers Model G Wartungshandbuch PDF herunterladen (Seite 21)

per square inch and can be obtained by ad-"_"",;

justmentof theoi! press~e reliefvalve-. < '00- _._

not atter.1pt to adjust low oil pressure·by-use, ':'

- .

, ',. ~ :~ ".:.::1'. r:·:

of the pressurereUef valve until all other

sources 'oflow oU-pressure -are, investigated.

," .;

CAMSHAFT-

: ~...> !. :.:.

~t·"'1; ..-

the governor spider assembly and pull the

camshaft timing 'gear • 'Remove the cam'

shaft thrust plafe and pull the camshaft from

the.engine. '

The cam followers or tappets may be re-

moved from the valve compartment if the

adjUsting screws are removed.

Inspection

The maximum clearance between the cam-

shaft journal and the cylinder block should

not be more than .007". Check the camshaft

vent opening into the governor thrust cap

-'-" - ·"shaft. H this hole is plugged, it will be im-

possible to obtain good governor action.

Removal

Remove the hood and hood support. Drain

the oil and remove the oil sump. Remove

the cylinder head and the valves. Remove

the crankshaft fan drive pulley and the timlng

gear cover. Remove the distributor. Remove

PULLING CAMSHAFT GEAR

Check the openingbetween the center of the

front cam journal and the oil hole leading to

the thrust plate. Check the shaft journals,

cam lobes andcamfollower faces for wear or

scoring. H scored, they shouid be replaced.

The back lash of the timing gear will not

cause the engine to become inoperative,

however, as clearance increases noise will

also increase. Noise usually becomes ob-

jectionable as the back lash clearance ap-

proaches

.020".

The end play of the camshaft should be ap-

proximately .005". H this clearance exceeds

.007", a new thrust plate assembly should be

used.

Assembly'

Whenthe camshaft is replaced or reinstalled,

the valves must be timed. There is a single

mark on the crankshaft gear and a double

mark on the camshaft gear. The single mark

must be placed between the double mark.

G - 20

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