Toro 500 EFI Service Manual page 53

10. With the timing inspection plug removed and the cam
chain held tight, rotate the crankshaft until the piston is at
top-dead-center.
11. While holding the cam chain to the front, install the rear
cam chain tensioner guide into the cylinder head. Install
the pivot cap screw and washer. Tighten to 11 ft-lb.
12. With the alignment pin installed in the camshaft and the
cam lobes directed down (toward the piston), place the
camshaft in position and verify that the timing mark on
the magneto is visible through the inspection plug and
that the timing marks on the camshaft sprocket are paral-
lel with the valve cover mating surface.

NOTE: When the camshaft assembly is seated,
make sure the alignment pin in the camshaft aligns
with the smallest hole in the sprocket.
13. With the alignment pin installed in the camshaft, loosely
place the cam sprocket (with the recessed side facing the
camshaft lobes) onto the camshaft and place it into posi-
tion with the cam chain over the sprocket.
14. Place the C-ring into position in its groove in the cyl-
inder head.
CD383

NOTE: At this point, oil the camshaft bearings, cam
lobes, and the three seating journals on the cylinder
head.

NOTE: Note the position of the alignment marks on
the end of the camshaft. They must be parallel with
the valve cover mating surface. If rotating the cam-
shaft and sprocket is necessary for alignment, do not
allow the crankshaft to rotate and be sure the cam
lobes end up in the down position.
GZ190C
15. When the camshaft assembly is seated, ensure the
following.
A. Piston still at top-dead-center.
B. Camshaft lobes directed down (toward the pis-
ton).
C. Camshaft alignment marks parallel to the valve
cover mating surface.
D. Recessed side of the sprocket directed toward
the cam lobes.
E. Camshaft alignment pin and sprocket alignment
hole (smallest) are aligned.
If any of the above factors are not as stated, go back to
step 13 and carefully proceed.
16. Place the tab washer onto the sprocket making sure it
covers the pin in the alignment hole.
CD463
CAUTION
MD1359
FI615
51