Removal and Replacement

CAUTION: DO NOT use an oxygen/acetylene torch to heat the gear upon removal from the camshaft. This will weaken the gear-to-hub joint and result in gear failure.

REMOVAL
1. Remove camshaft.
2. Support gear hub and press the camshaft out of the gear.
3. Remove all burrs and smooth any rough surfaces caused by removing the gear.

INSPECTION





Fig. 137





Fig. 138

Visually inspect the camshaft gear for cracks (hub and gear), chipped or broken teeth, or excessive fretting (Fig. 137) (Fig. 138). Inspect and replace the keyway, if damaged.

INSTALLATION
1. If replacing the camshaft, make sure the keyway is transferred to the new camshaft.
2. Lubricate the camshaft surface with Lubriplate 105, or equivalent.

CAUTION: The camshaft gear will be permanently distorted if overheated. The oven temperature should never exceed 177°C (350°F).

3. Heat the gear in an oven at 177°C (350°F) for 45 minutes.





Fig. 139

WARNING: WEAR PROTECTIVE GLOVES (Fig. 139) TO HANDLE THE HOT GEAR.





Fig. 140

4. Install the gear with the timing marks visible (Fig. 139). Be sure the gear is seated against the camshaft shoulder (Fig. 140).
5. If the camshaft is not to be used immediately, lubricate the lobes and journals to prevent rust.
6. Install the camshaft.