159212-4320 ZEXEL 9 421 618 293 BOSCH HEADLESS SCREW 9421618293 1592124320 1157234000

TIMING SLOT PLUG (Typical Example)
1. Plug.2. Rotate the engine crankshaft CLOCKWISE (as viewed from front of engine) until the timing pin drops into the timing slot in the fuel pump camshaft.3. Remove retaining screw (2) and washer (3) from end of engine camshaft.4. Remove automatic timing advance unit (4) from the camshaft.
REMOVING TIMING ADVANCE RETAINING SCREW
2. Retaining screw. 3. Washer. 4. Automatic timing advance unit.Install Automatic Timing Advance Unit
1. If timing mark on crankshaft gear and timing mark on camshaft gear are not aligned, rotate the crankshaft CLOCKWISE (as viewed from front of engine) until timing mark on crankshaft gear is aligned with timing mark on camshaft gear.
TIMING MARKS2. Align holes in weights with dowels in gear and install the automatic timing advance unit.3. Align pin (5) in washer with hole (6) in camshaft and install washer (3).
INSTALLING WASHER
3. Washer. 5. Pin. 6. Hole.4. Install retaining screw (2) and tighten to 108 36 lb. in. (124.5 41.5 cm.kg). Stake screw in two places.
STAKING SCREW (Typical Example)
2. Retaining screw.
Stake retaining screw (2) carefully. Heavy blows on washer or retaining screw can force the shaft extension too far into the camshaft and eliminate all end clearance.
5. After retaining screw (2) is staked, the gear and weight assembly requires .003 to .027 in. (0.08 to 0.69 mm) end clearance to prevent binding against the washer, camshaft end, or camshaft gear.