Napa 6-746A Manual De Instrucciones página 6

OPERATION
The air regulator knob can be used
as an air throttle, if there are no
other means of regulating air. Turn
the air regulator knob all the way
to position 4 for maximum power.
The air regulator can be used to
adjust torque to the approximate
tightness of a known fastener.
To set the tool to desired torque,
select a nut or screw of known
tightness of the same size, thread
pitch and thread condition as those
on the job. Turn air regulator to
low position, apply wrench to nut
and gradually increase power (turn
regulator to
admit more air)
until nut moves
slightly in the
direction it was
Forward/
originally set.
Reversing
The tool is now
Valve
set to duplicate
that tightness
- note regulator
setting for future
use. When tight-
ening nuts not
PLEASE REVIEW ALL WARNING INSTRUCTIONS PRIOR TO OPERATION. SAVE THIS MANUAL FOR FUTURE REFERENCE.
6-746A
requiring critical torque values,
run nut up flush and then tighten
an additional one-quarter to one-
half turn (slight additional turning
is necessary if gaskets are being
clamped). For additional power
needed on disassembly work, turn
regulator to its fully open position.
This impact wrench is rated at 1/2"
USS bolt size. Rating must be down
graded for spring U bolts, tie bolts,
long cap screws, double depth
nuts, badly rusted conditions and
spring fasteners as they absorb
much of the impact power. When
possible, clamp or wedge the bolt
to prevent springback.
Air Regulator
Knob
Air Inlet
three to five seconds, use a larger
size impact wrench. Do not use
impact wrench beyond rated
capacity, as this will drastically
reduce tool life.
The reversing valve is used to
change the rotation of the tool.
When the valve is out the rear of
end cap, the tool is in a forward
or right hand rotation. When the
valve is pushed in, the
rotation is reverse or left hand.
(The illustration of the tool shows
the tool in the reverse position.)
NOTE: Actual torque on a fastener
is directly related to joint hardness,
Soak rusted
tool speed, condition of socket
nuts in
and the time the tool is allowed to
penetrat-
impact.
ing oil and
Use the simplest possible tool-to-
break rust
seal before socket hook up. Every connection
removing absorbs energy and reduces power.
with impact
wrench. If
nut does
not start
to move in
S
Free Speed ................... 7,000 RPM
Max. Torque ............... 400 ft. lbs.
Torque Range .............. 50-350 ft. lbs.
Weight ........................ 5.72 LBS.
Length .......................... 7.48"
Air Inlet ....................... 1/4" NPT
Avg. Air Cons. ............. 5.0 CFM
Recom. Air Pressure .... 90 PSIG
6
PECIFICATIONS
Rev. 05/27/05