156637-1720 ZEXEL 9 423 617 747 BOSCH COUPLING PLATE 9423617747 1566371720 1157801220

4. Put rocker shaft assembly (3) in position on the cylinder head. 5. Install Jacobs washers (4) on the Jacobs stud assemblies (6). Put clean oil on the threads, and install washer and bolt (5) and Jacobs stud assemblies (6). Tighten the center bolt and Jacobs stud assemblies in increments of 70 N m (50 lb.ft.) each until a final torque of 450 N m (330 lb.ft.) is obtained.6. Make an adjustment to the valves to have a clearance of .015 (0.38 mm) for the intake valves and .030 (0.76 mm) for the exhaust valves. Tighten the locknuts to a torque of 28 4 N m (21 3 lb.ft.), and check the valve clearance again. See Testing And Adjusting for the correct procedure. 7. Install a new Jacobs O-ring seal (7) on the Jacobs oil supply adapter in the rocker shaft assembly. Put clean oil on the Jacobs O-ring seal.
Do not cause damage to the O-ring seals on the inner fuel lines.
8. Install inner fuel lines (8). Tighten the fuel line nuts to a torque of 40 7 N m (30 5 lb.ft.) with tooling (A) and (B). The Jacobs brake for the 3406B Truck Engine has only one support bracket (9).9. Put Jacobs support brackets (9) in position as shown. Put oil on the threads of Jacobs bolts (10). Install the washers on the Jacobs bolts. Install Jacobs bolts (10) that hold the Jacobs support bracket in place. Tighten the Jacobs bolts to a torque of 450 N m (330 lb.ft.). 10. Install Jacobs washers (11) on the Jacobs stud assemblies.
Be extra careful not