Harley Davidson Dyna evolution 1991-1998. Service manual - page 2
Adjustable Wrenches
An adjustable wrench can be adjusted to fit nearly any nut or bolt head
which has clear access around its entire perimeter. Adjustable wrenches
are best used as a backup wrench to keep a large nut or bolt from
turning while the other end is being loosened or tightened using a
proper wrench. See Figure 31.
Adjustable wrenches have only two gripping surfaces which makes them
more subject to slipping off the fastener and damaging the part and
possibly your hand. See Box-end, Open-end and Combination Wrenches in
this chapter.
These wrenches are directional; the solid jaw must be the one
transmitting the force. If you use the adjustable jaw to transmit the
force, it will loosen and possibly slip off. Adjustable wrenches come in
all sizes but something in the 6 to 8 in. range is recommended as an
all-purpose wrench.
Socket Wrenches
This type is undoubtedly the fastest, safest and most convenient to use.
Sockets which attach to a ratchet handle (Figure 32) are available with
6-point or 12-point openings and 1/4, 3/8, 1/2 and 3/4 in. drives. The
drive size indicates the size of the square hole which mates with the
ratchet handle.
Torque Wrench
A torque wrench (Figure 33) is used with a socket to measure how tightly
a nut or bolt is installed. They come in a wide price range and with
either 3/8 or 1/2 in. square drive. The drive size indicates the size of
the square drive which mates with the socket.
Impact Driver
This tool makes removal of tight fasteners easy and eliminates damage to
bolts and screw slots. Impact drivers and interchangeable bits (Figure
34) are available at most large hardware and motorcycle dealers. Do not
purchase a cheap one as they do not work as well and require more force
than a moderately priced one. Sockets can also be used with a hand
impact driver. However, make sure the socket is designed for use with an
impact driver. Do not use regular hand type sockets, as they may shatter
during use.
