The harness assemblies are constructed of a lightweight, flexible, silicone coated cable having
a
400°F temperature rating. Because the harness assemblies are lightweight and flexible, the
following suggestions should be observed when installing the harness on an engine;
A.
Support leads with as many clamps and cable ties as are necessary to prevent any
whipping or chafing action.
B.
Route leads as far away from exhaust
manifold as possible to insure they are not exposed
to temperatures in excess of
400~~.
C. To prevent sticking of sleeves and to minimize twisting of ferrule, coat insulating
sleeves* and lubricate ferrule shoulders** (see Figure
74-00-01). Fasten coupling nuts to the
proper spark plugs and torque as specified in Table
74-00-03. Tighten elbow assembly nuts to
outer ferrule.
*fluorocarbon Spray MS
#S122,
Miller-Stephenson Chemical
Co.,
inc.,
16
Sugar Hollow Road, Danbury, Connecticut
06810.
**Go-Jo No-Lok No.
72
Compound, Gojer, Inc., Akron, Ohio
44309
or Molykote Type
G,
The Alpha Molykote Corp., Stamford, Connecticut
06904.
NOTE
. .
. Hold ferrules while tightening or loosening spark plug coupling nuts to protect
against twisting conduit or cable.
D.
If elbow assemblies are not used and installation results in a severe angle where conduit
connects to the spark plug, use clamp
P/N
10-320283 as shown in Figure 74-00-02,
"Installation of Elbow Clamp". Secure clamp with screw and lockwasher P/N 10-35936-6 and
nut
P/N 10-90404-4, The clamp will maintain a 70° elbow eliminating overstressing the lead.
FIGURE
74-00-03.
COUPLING NUT TORQUE VALUES.
Spark Plug
I
Torque
I
Coupling Thread
I
(in.-Ib.1
I
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