GMC 1976 ZEO 6083 Maintenance Manual page 420

6Y- 40 ENGINE ELECTRICAL
Figure 36-Removing Point Shield
3 . Lift the two wiring terminals out of the snap-
lock retainer, Figure 37, and remove the two screws
and contact points .
ADJUSTING DWELL ANGLE
1 . Remove the distributor cap, rotor, and shields.
Inspect contact points ; clean if necessary. Check cam
lubricator for sufficient lubricant, if necessary apply
a thin film of lubcitant No . 1948792 or equivalent to
the breaker cam. Install shields, rotor and cap.
2. Connect a dwell meter to the distributor pri-
mary distributor negative lead terminal on the coil
and ground .
Figure 37-Removing Contact Points
Figure 38-Cam Lubrication
3 . Raise window on side of distributor cap .
4. With the engine running at idle speed, insert
CONTACT POINT INSTALLATION
NOTE;
The two-piece shield suppresses radio in-
terference and must be installed and screws
tightened securely . Snap-lock (push in) terminal
contact points have sufficient clearance between
the shield and wire terminals to prevent acciden-
tal short circuiting . Screw terminal contact point
sets may not have sufficient clearance . Wire ter-
minals must be firmly pushed in and bent
slightly toward cam to prevent them from
touching the shield .
1 . Install contact points on breaker plate.
2. Install primary and condenser wire terminals
in snap-lock terminals. Seat them firmly and bend
them slightly toward cam. Position wires to prevent
interference with weights, rotor or distributor cap.
3. The cam lubricator is mounted on breaker
plate with feet away from cam. Figure 38 . Apply a
thin film of lubricant 1948792 or equivalent to cam,
not the wick .
4. Place one-half of shield over contact points,
Figure 39, align screw hole, install and firmly tighten
screw. Make sure wire terminals are not touching
shield .
5. Install other half of shield, align screw hole,
install and firmly tighten screw .