Yingang YG48Q-5A, Maintenance Manual

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YG48Q-5A Maintenance ManualCylinder Head, Cylinder and Piston
57
Camshaft
To remove the camshaft:
1. Remove the lower / upper eyehole cover and turn
the crankshaft so that the piston is at the upper dead
point of the compression stroke.
2. Remove the cylinder head cover (See Removal of
cylinder head cover).
3. Remove the camshaft end cover, loosen the screw
and washer at the tail end of the tensioner; turn the
screw clockwise with the tensioner locking key
sothat the tensioner is loosened and locked.
4. Remove the timing driven sprocket bolt
5. Remove the camshaft retaining pins
6. Remove the camshaft sprocket bolt.
-
7. Strip the timing chain from the timing driven sprocket,
and remove the timing driven sprocket.
8. Remove the camshaft
Caution
Do not drop the timing chain into the crankcase.
To mount the camshaft:
1. Turn the crankshaft so that the piston is at the upper
dead point of the compression stroke and the scale
line “I” on the rotor is aligned with the triangular
indication mark on the left front cover.
2. Clean all parts and components, coat the mixture of
engine oil and molybdenum disulfide on the
protruding surface of the camshaft, and coat oil
engine on the journal part.
3. Mount the camshaft retaining pins, camshaft
，
camshaft bearings and timing driven sprocket; let the
basic circle part of the camshaft facing up while
timing.
Tensioner
Alignment
Alignment