For technical questions or replacement parts, please call 1-800-444-3353.
Revised Manual 10i
Page 2
SAVE THIS MANUAL
Keep this manual for the safety
warnings and precautions, assembly,
operating, inspection, maintenance and
cleaning procedures. Keep this manual
and the receipt in a safe and dry place for
future reference.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling,
and all other information
provided with this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that
follow this symbol to avoid
possible injury or death.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING indicates
a hazardous
situation which, if not
avoided, could result in death
or serious injury.
CAUTION, used
with the safety alert
symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
NOTICE is used to
address practices
not related to personal injury.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
WARNING Read all safety
warnings and instructions.
Failure to follow the warnings and
instructions may result in serious
injury.
Save all warnings and
instructions for future
reference.
The warnings, cautions, and 1.
instructions discussed in this
instruction manual cannot cover all
possible conditions and situations
that may occur. It must be understood
by operator that common sense and
caution are factors which cannot be
built into this product, but must be
supplied by the operator.
Wear ANSI-approved safety goggles 2.
and heavy-duty work gloves during
use.
Use only within rated torque range. 3.
Do not use for loosening.
Use as intended only. Do not use 4.
as hammer or pry bar. Do not use
handle extension to increase force.
Do not drop.
Inspect before every use; do not use 5.
if damaged or parts loose.
Keep away from children.6.
For your safety, service, calibration, 7.
and maintenance should be
performed regularly by a qualied
technician.
Use only sockets with the correct 8.
drive and rated to at least the torque
that will be applied to it.
Torque Range (ft-lb) 20-150 50-300
Drive1/2”3/4”
Length18”33-1/2”
Accuracy±4%
UNPACKING
When unpacking, make sure that
the item is intact and undamaged. If any
parts are missing or broken, please call
Harbor Freight Tools at 1-800-444-3353 as
soon as possible.
OPERATING INSTRUCTIONS
Read the ENTIRE IMPORTANT
SAFETY INFORMATION section
at the beginning of this manual
before set up or use of this
product.
Wear ANSI-approved safety goggles 1.
and heavy-duty work gloves.
Lock
Knob
5. Turn the Lock Knob at bottom of the
Handle counterclockwise until it stops.
Turn the handle to set the torque. To 6.
set to 55, for example:
189
0
80
60
70
50
2
(A)
a. Turn the knurled handle (CW or
CCW) until the “0” graduation on
the bevel edge lines up with 50.
See illustration (A), above.
Clean and/or repair the threads that 2.
will be tightened. Damaged or dirty
threads will result in a misleading
torque reading.
Select the desired socket and verify 3.
it ts properly on the nut or bolt being
tightened.
Press the socket rmly onto the drive 4.
anvil.
Wrenches
634
5
80
60
70
50
7
(B)
The 50 line is shown in grey because it
will likely be hidden at this point.
b. Continue turning the knurled handle
about a half turn clockwise until the
“5” graduation mark lines up with
the centerline. It is now set for 55.
See illustration (B), above.
Retighten Lock Knob by turning it all 7.
the way clockwise.
Direction
Switch
8. Set the Direction Switch for clockwise
or counterclockwise operation. The
Switch shown above is in position for
clockwise operation.
Place socket onto the nut or bolt and 9.
pull handle gradually until a click is
heard or felt. Do not pull beyond that point; the click indicates that the
torque setting has been reached.
Stop pulling and the Torque Wrench 10.
will automatically reset.
When nished, set the Torque to the 11.
lowest torque setting (not lower than
the lowest setting) before storing
indoors out of reach of children.
handle (CW and CCW) several times
to re-lubricate the internal workings.
Then, operate at a low torque setting
several times. This ensures proper
operation. Do not turn knurled
handle below the lowest torque
setting.
Wipe Torque Wrench with a cloth to 3.
clean. Do not immerse in any cleaning
solution. This would damage the
internal lubrication.
The Torque Wrench was calibrated 4.
and tested to ± 4%. Periodically have
the Wrench calibrated and serviced
by a qualied technician.
Store inside case in a clean and dry 5.
location.
Note: Replacement parts are not
available for this item.
CLEANING, MAINTENANCE,
AND LUBRICATION
TO PREVENT
INJURY FROM
TOOL FAILURE:
Do not use damaged
equipment. If abnormal noise
or vibration occurs, have the
problem corrected before
further use.
BEFORE EACH USE,1. inspect the
general condition of the tool. Check
for loose hardware, misalignment or
binding of moving parts, cracked or
broken parts and any other condition
that may affect its safe operation.
If the Torque Wrench has not been 2.
used for some time, turn the knurled