Eastwood 31338 User manual

1/2” DRIVE MICROMETER
TORQUE WRENCH
INSTRUCTIONS
Part #31338

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The 1/2” DRIVE MICROMETER TORQUE WRENCH is a heavy-duty professional quality, click-type
Torque Wrench, ruggedly designed for many years of reliable service. It features all metal construction
to ensure durability. The 30 to 250 Foot Pound Range is perfect for heavy automotive applications.
CONTENTS
(1) Torque Wrench
(1) Heavy Duty Blow Molded Storage Case
SPECIFICATIONS
Range: 30 to 250 ft-lbs in 0.5 ft-lb increments
1/2” Drive
24 Tooth, Reversible Ratchet
+/- 4% Clockwise Accuracy, +/- 6% Counter-Clockwise Accuracy

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READ INSTRUCTIONS
• Thoroughly read and understand this manual before using.
• Save for future reference.
INJURY HAZARDS!
• This tool creates high amounts of leverage while in operation, Wear ANSI
approved eye protection and heavy duty work gloves at all times while
operating.
• Over torqueing can cause part failure.
• Read and understand all manufacturer’s instructions for the vehicle or
object which the fastener is being torqued. Failure to do so could cause
damage or personal injury.
INJURY HAZARDS!
• Do not use for loosening and installing fasteners. Use only for tightening a
fastener to the recommended torque.
• Do not extend handle by use of a pipe or other means. Doing so may cause
damage or personal injury.
• Inspect before every use, if tool appears damaged do not use.
• Ensure all sockets and ancillary tools used in conjunction with this torque
wrench are rated to handle the intended torque setting.
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.
SAFETY INFORMATION
The following explanations are displayed in this manual, on the labeling,
and on all other information provided with this product:

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SETTING THE TORQUE WRENCH
1. To unlock, pull the Lock Collar towards
the Hand Grip (FIG 1).
2. While holding the Lock Collar back, turn
the handle clockwise to the desired
torque value. To select the desired
torque, turn the handle until the “0”
aligns with the major graduation (FIG 2),
then continue turning until the desired
minor graduation is in line with the barrel
center line (FIG 3).
3. Release the Lock Collar. Rotate the grip
slightly until the Lock Collar springs
forward and locks.
4. The wrench is now set for operation.
FIG. 1
✓
FIG. 2
FIG. 3
Pull
Lock
Collar
Down
Rotate
Handle
Do not turn the handle below the
minimum torque setting or above
the maximum torque setting.
Shown
set to
70 ft-lb
Shown
set to
73 ft-lb

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SETTING THE TORQUE WRENCH
WITH TORQUE ADAPTERS
If a Torque Adapter is being used, the effective lever length will change with the addition of the
adapter. Use the equations below to compute the torque setting adjustment necessary.
NOTE: Socket Drive Extensions are axially in line with the drive mechanism of the torque wrench
and do not require adjustments.
E= Adapter length
L= Torque wrench length
TW = Torque set on wrench
TE = Actual torque applied with extension in place
TW = (TE x L) / (L+E)
TE = (TW x (L+E))/ L
✓
✓
L
E
✓
✓

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OPERATION
1. Set Torque Wrench to the desired value (See section: Setting the Torque Wrench).
2. Install appropriate socket and secure the socket on the fastener.
3. Center hand on the hand grip and apply a steady force in the desired direction until a click is
felt or heard. Immediately stop pulling once the click is felt or heard. The fastener is now
torqued to the desired setting.
4. This tool will not prevent you from applying more torque than the tool is set for. Do not continue
to apply force once the tool setting has been reached. Never apply more torque than the maxi-
mum scale reading.
5. When applying pressure to the wrench, hold by the grip only. Never apply pressure to the body
of the wrench.
6. If, at high torque settings, both hands are necessary to apply enough pressure, hold the grip in
one hand and put the other hand on top of the first hand.
7. After each use, pull Lock Collar and rotate handle counterclockwise until the Torque Wrench
is at its lowest setting. This will ensure the torque wrench will stay in calibration as long
as possible.
MAINTENANCE
• Before each use inspect the condition of the tool for damage.
• This Torque Wrench was calibrated and tested during production. This is a precision instrument
that requires regular re-calibration to maintain peak accuracy.
• After each use ensure that the wrench is set to its lowest torque setting.
• If the Torque Wrench has not been used or has been in storage for some time, operate it sev-
eral times at a low torque setting to permit the internal lubricant to re-coat working parts.
• Periodically coat tool with a rust preventative coating such as a light machine oil.

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© Copyright 2016 Easthill Group, Inc. 6/16 Instruction item #31338Q Rev 0
If you have any questions about the use of this product, please contact
The Eastwood Technical Assistance Service Department: 800.544.5118 >> email: [e-mail]
PDF version of this manual is available online >> eastwood.com/31338manual
The Eastwood Company 263 Shoemaker Road, Pottstown, PA 19464, USA
US and Canada: 800.345.1178 Outside US: 610.718.8335
Fax: [phone] eastwood.com