Case W9 - Rocker Arm Assembly; Rocker Arm Assembly Procedures

22-16
ROCKER ARM ASSEMBLY
(Refer to Figure 12)
Disassembly
Be sure the rocker arm assemblies are tagged so they are installed on the same cylinder
head they were removed from. Tag component parts for proper assembly. Do not intermix
parts from one assembly to another .
1. Remove the oil tube (1) with the "0" ring
(2). Remove the "0" ring and discard it .
Remove the snap rings (3) and spacer
washers (5) . Keep count of the number of
washers used at each end of the shaft (4) .
Tag each rocker arm for original location.
Remove the exhaust rocker arms (6) and
the shaft brackets (7) from the shaft (4).
2.
Remove the · intake rocker arms (8) and
the shaft spring (9) .
Inspection
Check the shaft spring for damage and
proper tension .
Spring Specifications:
Total Coils (Working coils) ---------- 4
Wire Diameter--------- - -------- .080"
Compressed to 1-9/16 -------- 10 lbs .
Flush the shaft to remove any residual
material. Inspect the shaft for worn spots on
the bottom side of the shaft. Replace the
shaft if a worn condition exists .
Inspect the rocker arms by installing each
rocker arm on the shaft in its proper loca-
tion. The rocker arm must be free on the
shaft without any side wobble. If any is noted,
replace the rocker arms. Clean the oil holes
in the rocker arms to insure free oil flow.
Inspect the valve stem contact area on the
rocker arm for wear. Replace if worn . In-
spect the tappet adjusting screw for wear
marks or pitting.
Assembly
With all components parts cleaned thoroughly and worn parts replaced, coat them with clean
engine oil. ·
1. Install the shaft spring (9) and the two
intake rocker arms (8) on the shaft (4).
When
installing the rocker arms, keep
the shaft oil holes toward the valves,
See Inset A.
2.
Install the shaft brackets{7) on the shaft
(4) with the split side toward the push rod
side of the engine.
3. Install the exhaust rocker arms (6) on the
shaft (4). Install the same number of
spacer washers (5) at each end of the shaft
as were removed during disassembly.
4. Install the snap rings (3) at each end of
the shaft. Check the rocker arms for free
movement. Install the oil tube (1) with a
new
"0" ring (2). Install the adjusting
screws (10) and lock nuts (11) if they were
removed for replacement .
5.
Install the rocker arm and shaft assembly
as instructed on Page 22-12 and 22-14.
6. Check the exhaust rocker arms for ex-
cessive end play. One or more spacer
washers can be used between the exhaust
rocker arms (6) and snap rings (3) to re -
move excessive end play. A clearance of
.0lO"to .030"must be maintained at each
end of the shaft and can be checked in the
area shown in Inset B.