4-29. CAMSHAFT AND GEAR ASSEMBLIES REPLACEMENT (Cent)
Compressed air used for cleaning purposes will not exceed 30 psi. Use
only with effective chip guarding and personal protective equipment
(goggles/ shield, gloves, etc).
(1) Soak camshafts in clean fuel oil. Run a bore brush through oil gallery to remove any sludge
or foreign material. Clean exterior of camshaft. Blow out oil gallery and oil holes with
(2) Clean gears, bearirqjs, and related parts with fuel oil. Dry with compressed air.
(1) Check camshaft keyways and threads for damage.
(2) Inspect camshaft journals and lobes for wear and scoring. Check wear on camshaft lobes as
(a) Measure flat of cam lobes with a set of tapered feeler gages (41) and straight edge (42).
(b) Replace camshaft if flats are more than 0.003 inch deep.