TM 55-203
e.
Attaching a drill, a reamer, a tap, or other
(1)
A solid-end wrench must be of the
proper size to fit the object on which it is to be used, or
tool to an electric or a pneumatic motor while the motor
another wrench will be properly adjusted.
is running is prohibited.
(2)
A monkey wrench or similar wrench
f.
Using a pneumatic hammer for riveting,
will be placed so that the turn is toward the open side of
unless it is equipped with a spring clip or other
the jaws.
arrangement for holding the die or set in the hammer, is
prohibited.
(3)
The use of any object, as a shim
between a nut, a bolthead, or a similar object, and the
g.
Pointing a pneumatic hammer at a person is
jaws of a wrench, to make the wrench fit is prohibited.
prohibited.
(4)
The body must be braced to avoid
21-8. Use of Jacks
overbalancing in case the wrench slips, or wrench, bolt,
a.
Before the end of a car or a crane is jacked
nut, or other object fails.
up, the wheels or end must be blocked.
(5)
Before full force is applied, the
b.
After a car has been jacked up, trestles or
wrench must have a proper grip; then force is gradually
blocks are placed under it. Going under or working on
increased until nut, bolt, pipe, or other object turns.
such equipment not so protected is prohibited
Jerking a wrench is prohibited.
c.
The jack should be set securely with proper
(6)
The use of a pipe or other object to
contact at top and bottom.
extend the length of the handle, unless the wrench is
designed to be extended, is prohibited.
d.
A piece of wood should be inserted between
jackhead and load when jacking against metal. Jacking
d.
Standing on the same side as the striker
metal against metal is prohibited.
while holding a bar, a cutter, or a punch is prohibited.
e.
The use of a handle which is not standard
e.
When striking tempered or case-hardened
for the type of jack being operated is prohibited. The
objects, a soft hammer will be used or the object will be
use of a bar or handle which does not fit is prohibited. f.
cushioned with wood.
Using the jack without the handle fully inserted in the
.
It is prohibited to use a file as a wedge or
socket is prohibited.
pry, to strike a file with metal, or to use a file without a
g.
The handle must be removed when the jack
handle.
is not being operated.
g.
It is forbidden to carry a file, an ice pick, or
h.
Personnel using a ratchet jack must stand at
other pointed tools, unless the point is protected.
the side of the handle In a braced position and move the
h.
It is forbidden to leave a shovel, a fork, a
handle slowly and uniformly, being sure that the latches
rake, a hoe, or other pointed or edged tool with the
are fully engaged and that the body is clear of the
pointed edge up when not in use.
handle before releasing pressure on the jack.
21-7. Operation of Portable Power Tools
i.
Using a jack of lower capacity than required
for the job is prohibited.
a.
The operation of electric or pneumatic tools
by personnel who have not been instructed in their use
j.
Leaving jacks standing under load in shops
is prohibited.
or on repair tracks without support of trestles, horses, or
blocks is prohibited.
b.
It is prohibited to connect or disconnect a
pneumatic tool before closing the valve at the supply
21-9. Operating Oxyacetylene Equipment
line or draining the pressure from the hose.
a.
The operation of cutting or welding
c.
Laying down an electric or a pneumatic tool
equipment by unauthorized persons is prohibited.
while the motor is running is prohibited. Such a tool will
b.
Clothing and shoes that will give full body
be placed in a position where trigger, valve, or switch is
protection must be worn when cutting or welding
shielded to prevent the tool from being accidentally
operations are being performed. Wearing torn, oily, or 1
started.
greasy clothing when performing welding operations is
d.
Leaving unattended a drill, a reamer, or a
prohibited.
tap with an electric or a pneumatic motor attached is
c.
Attempting to repair a gas cylinder or valve
prohibited.
is prohibited.
21-4
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