Page 292
REPAIR INSTRUCTIONS, PART 3
9. Insert the camshaft gear alignment tool,
J 47450-1, into the hole in the timing gear
plate, the camshaft gear teeth and place the
rod of the tool in the gauge plate slot. It may
be necessary to rotate the camshaft slightly
until this occurs. With the camshaft gear
alignment tool properly positioned in the
gauge plate slot, check that the camshaft
TDC mark is still positioned between the two
timing marks on the No. 7 camshaft bearing
cap.
10. Remove the camshaft gear alignment tool,
J 47450-1, from the camshaft gear.
11. Insert a 0.1 mm (0.004 inch) thickness
gauge on the pressure side of the adjustable
idler gear tooth and camshaft gear tooth by
using feeler gauge holder J 44935 and
J 44514-6 feeler gauge. Tighten the bolts on
the adjustable idle gear by hand only.
12. Remove the feeler gauge from the gear
teeth.
13. Install the J 44514-5 clamp assembly tool to
the timing gear plate. Screw the hold-down
against the adjustable idler gear so the
adjustable idler gear does not rotate.
430
Figure 430 — Clamp Assembly Tool
14. Install the magnetic stand, 9999696, and
dial indicator 9999683, so the tip of the dial
indicator rests on a tooth of the camshaft
gear. Check the gear backlash by rotating
the camshaft gear back and forth slightly to
measure the backlash. For backlash
specification, refer to the SPECIFICATIONS
section.
Check that the camshaft is positioned at
TDC by having the TDC marking on the
camshaft aligned with the markings on the
No. 7 camshaft bearing cap.
431
Figure 431 — Camshaft Gear Backlash Measurement
1. Idler Gear 2. Camshaft Gear
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