General Information
Hammers
Various types of hammers are
available to fit a number of
applications. Use a ball-peen hammer
to strike another tool, such as a punch
or chisel. Use soft-faced hammers
when a metal object must be struck
without damaging it. Never use a
metal-faced hammer on engine and
suspension components because
damage occurs in most cases. Always
wear eye protection when using
hammers. Make sure the hammer face
is in good condition and the handle is
not cracked. Select the correct hammer
for the job and make sure to strike the
object squarely. Do not use the handle
or the side of the hammer to strike an
object.
Ignition Grounding Tool
Some test procedures require turning
the engine over without starting it. To
prevent damage to the ignition system
from excessive resistance or the
possibility of fuel vapor being ignited by
an open spark, remove the spark plug
cap and ground it directly to a good
engine ground with the tool shown in
(Figure 18).
Make the tool shown from a No.6 screw
and nut, two washers, length of tubing,
alligator clip, electrical eyelet and a
length of wire.
Precision Measuring
Tools
The ability to accurately measure
components is essential to perform
many of the procedures described in
this manual. Equipment is manufactured
to close tolerances, and obtaining
consistently accurate measurements is
essential to determine which
components require replacement or
further service. Each type of measuring
instrument is designed to measure a
dimension with a certain degree of
accuracy and within a certain range.
When selecting the measuring tool,
make sure it is applicable to the task. As
with all tools, measuring tools provide
the best results if cared for properly.
Improper use can damage the tool and
cause inaccurate results. If any
measurement is questionable, verify the
measurement using another tool.
A standard gauge is usually provided
with micrometers to check accuracy and
calibrate the tool if necessary. Precision
measurements can vary according to
the experience of the person performing
the procedure. Accurate results are only
possible if the mechanic possesses a
feel for using the tool. Heavy-handed
use of measuring tools produces less
accurate results. Hold the tool gently by
the fingertips to easily feel the point at
which the tool contacts the object. This
feel for the equipment produces more
accurate measurements and reduces
the risk of damaging the tool or
component.
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