CYLINDER HEAD (Cont'd)
Servicing (Cont'd)
Put the valve spring
in
a tester [A].
Push down
on
the spring 1.3839 inch (35,15 mm). The
compression load must be 22.
5-26
.
5Ibs
. (100-118
N).
Replace the valve spring
if
it does not meet these
specifications.
A
Measure the inside diameter of the rocker arm bushing 8
(Item
1)
[8]
and the shaft diameter (Item 2)
[8].
The inside of the rocker bushing
is
0.5513-0.5529 inch
(14,0-14,04 mm).
If the measurements are not within the specifications
replace the needed parts.
Valve Guide Installation
Use the tools listed to replace the valve guides:
Press-fit tool
Auxiliary fitting
Margin adjustment jig
See figure [C] for dimensions to make the press-fit tool.
See figure
[0]
for dimensions to make the auxiliary fitting.
Revised Sept. 90
c
8.000"
1.600"
(40,6
mm)
I
(203,2mm)
(80
mm)
f-----t----
r
3.
150"
-
~~
I:
J
'1
I
-7C-21-
80.800"
(20,3
mm)
0.510"
12,95
mm)
0.590"
(14,99
mm)
0.303"
(7,7 mm)
IMC-01389
R 0.155'
~(3,9mm)
IMC-01390
I
741,742, 743, 743DS Bobcat Loader
Service Manual
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