Rocker shaft assembly (page 2 of 2)

Refit

1. Clean rocker shaft and mating faces.

CAUTION: If rockers or rocker shaft are to be replaced, ensure replacements are correct. Engine Serial No. Prefixes 10P to 14P are fitted with type A rocker arms and shaft. Engine Serial No. Prefixes 15P to 19P are fitted with type B rocker arms and shaft. Type B rocker arms and shaft may be fitted to Engine Serial No. Prefixes 10P to 14P as an assembly.

2. Fit new rocker adjusting screws fully into rocker arm. Fit new lock nuts to screws but do not tighten.

CAUTION: Ensure screws are correct for type of rocker arms fitted. Replacement screws for Engine Serial No. Prefixes 15P to 19P have a centre punch mark adjacent to the adjusting slot. These screws are not interchangeable with those fitted to Engine Serial No. Prefixes 10P to 14P.

3. Fit rocker shaft ensuring it is located on dowel.
4. Fit and progressively tighten new rocker shaft bolts to 33 Nm (24 lbf.ft).
5. Before refitting the camshaft cover the electronic injection unit (EUI) rockers must be adjusted.
6. Remove tool LRT-12-058 from camshaft.
7. Rotate engine clockwise until No 1 injector lobe is at full lift.
8. Rotate rocker adjusting screw clockwise until the injector plunger is felt to bottom out.
9. Rotate rocker adjusting screw anti-clockwise one complete turn to give plunger the required bump clearance and tighten rocker arm adjusting screw locknut to 16 Nm (12 lbf.ft) .

CAUTION: Ensure screw does not turn as locknut is tightened.

10. Carry out above procedure for the remaining 4 rocker arms.
11. After completion of rocker arm adjustment, slowly rotate engine clockwise 2 complete turns by hand to ensure that no injectors are bottoming out on their plungers.
12. Fit camshaft cover gasket. ENGINE - Td5, REPAIRS, Gasket - cover - camshaft.
13. Fit cooling fan coupling. COOLING SYSTEM - Td5, REPAIRS, Fan - viscous.