Removal of Rocker Arm Assembly
1. Remove the fuel injectors from the cylinder head.
See Removal of Fuel Injectors on page 163.
2. Remove the bolts (Figure 6-41, (1)) that retain the
rocker arm shaft supports to the cylinder head.
3. Remove the rocker arm and shaft assembly from
the cylinder head.
NOTE : Identify the push rods and valve bridges so
they can be installed in their original locations.
4. Remove the push rods (Figure 6-41, (2)).
5. Remove the valve bridge assemblies (Figure 6-
41, (3)). Remove the seat (Figure 6-41, (4)) from
each valve bridge.
6. Identify all parts so that they will be reinstalled in
their original locations.
Figure 6-41
4TNV98 & 4TNE98 Diesel Engine
Disassembly of Rocker Arm Assembly
NOTE : Identify the rocker arms so they can be
reinstalled with the original matching valve and
pushrod.
1. Remove the rocker arm shaft alignment studs
(Figure 6-42, (5)) from the rocker arm shaft
supports (Figure 6-42, (6)).
2. Slide the supports, wave washers (Figure 6-42,
(7)), rocker arms (Figure 6-42, (8)), and fuel
injector retainers (Figure 6-42, (4)) off the rocker
shaft (Figure 6-42, (1)), leaving these parts in
order on the bench surface.
NOTE : Figure 6-42 shows components for one
cylinder. Components for all remaining cylinders are
assembled in the same order.
3. Remove the valve adjusting screw (Figure 6-42,
(2)) and the lock nut (Figure 6-42, (3)) from the
rocker arms.
84
Figure 6-42
Section 3. Engine