CAMSHAFT DRIVE GEAR MAINTENANCE - CONTINUED
CLEANING AND INSPECTION
Compressed air used for cleaning or drying purposes, or for clearing restrictions, should never exceed 30 psi
(207 kPa). Wear protective clothing (goggles/shield, gloves, etc.) and use caution to avoid injury to person-
Clean parts with detergent and water solution and dry with compressed air.
Inspect seal ring sealing surface of gear housing assembly, thrust plate, and head for cleanliness, burrs or damage.
Inspect woodruff key slot in hub and drive gear for evidence of cracks or wear. Replace camshaft drive gear assembly if
key slot is damaged.
Inspect camshaft drive gear teeth for scoring, pitting or excessive wear. If scoring, pitting or excessive wear is evident,
Inspect camshaft drive gear hub (7) for scoring, pitting or galling. If excessive, discard hub. Measure diameter (A). Min-
imum dimension should be 2.283 in (58.0 mm). Measure thrust plate contact area (B). Minimum dimension should be
0.254 in (6.45 mm). If any dimensions are below minimum, discard hub.
Inspect camshaft thrust plate (6) for scoring, pitting or galling. If scoring, pitting or galling is evident, discard thrust
plate. Measure thrust plate contact area (C). Minimum dimension should be 0.437 in (11.1 mm). If measurement is
below minimum, discard thrust plate