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REPAIR INSTRUCTIONS
Page 207
Valve Rocker Arm Shaft
Reassembly (without Engine Brake)
There is a shouldered rocker arm mounting
capscrew at one end of each rocker arm
assembly to ensure proper alignment.
Refer to Figure 214.
The assembly procedure for the rocker arm shaft
is described below. The arrangement includes
valve rocker arms (with lash adjusters) and
mounting brackets mounted on the shaft. The
bracket mounting dimensions are the same for
both non-brake and brake assemblies.
1. Lubricate the six adjusting screws and jam
nuts (4), and install one in each of the rocker
arms. The adjusting screws are identical for
both inlet and exhaust rocker arms.
2. Position the shaft (8) so that the screw
locating hole is in line with the bracket
locating screw hole.
3. The offset side of the bracket must be
positioned toward the right side of the
engine.
4. Assemble bracket (6) on a press table.
Press the shaft into the bracket until the oil
hole in the shaft is aligned with the hole in
the bracket. Install the locating screw and
lock washer (3) to secure the bracket on the
shaft.
5. Lubricate the spring washers (2) and install
the washers on the shaft, one on each side
of the mounting bracket.
6. Lubricate the exhaust rocker arm (5) and
install it on the shaft.
7. Install a flat washer and C-clip (1) on the
shaft to retain the exhaust rocker arm.
8. Lubricate the inlet rocker arm (7) and install
it on the shaft.
9. Install a flat washer and C-clip (1) on the
shaft to retain the inlet rocker arm.
10. Install a flat washer and C-clip, if so
equipped, on the shaft to position and retain
the exhaust rocker arm at the center position
of the shaft.
11. Lubricate the exhaust rocker arm and install
on the shaft.
12. Lubricate a spring washer, install it on the
shaft next to the exhaust rocker arm and
press the center mounting bracket onto the
shaft. This bracket does not have a threaded
hole on top or an oil hole at bottom surface.
Align the mounting surface and offset of the
bracket with the bracket already installed.
13. Lubricate a spring washer and install it on
the shaft next to the center bracket.
14. Lubricate and install the inlet rocker arm on
the shaft.
15. Install a flat washer and C-clip (1) on the
shaft to retain the center inlet rocker arm.
16. Follow steps 10 through 15 to install the
remaining set of rocker arms and mounting
bracket.
At this point, a used or scrapped cylinder head
can be used as a template for proper bracket
alignment and to ensure mounting surfaces of
each bracket are parallel.
17. Check for proper bracket alignment. Ensure
that mounting surfaces of each bracket are
parallel.
5_106_00.bk Page 207 Friday, August 4, 2000 11:17 AM
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