CDI Torque TORQUE WRENCHES Micro-Adjustable Click Type User Manual
MICROMETER ADJUSTABLE
“CLICK TYPE”
TORQUE WRENCH
REPAIR,
MAINTENANCE
AND
TROUBLESHOOTING
MANUAL
SUGGESTED PRICE $35.00
PART NUMBER: 21-201-01
ISSUED NOVEMBER , 2001
TABLE OF CONTENTS
TITLE PAGE(S)
SAFETY INSTRUCTIONS – WARNING & CAUTION
1
CDI TORQUE TESTING EQUIPMENT - Illustration
2
INTRODUCTION 3
CLEANING 3
LUBRICATION 3
REPAIR TOOLS REQUIRED 3
OTHER REQUIRED MATERIALS 4
INSPECTION 4
CAUTION – Customer misuse
4
ACCURACY VERIFICATION AND MINOR CALIBRATION
PROCEDURE
4/8
MINOR CALIBRATION ADJUSTMENT 6/8
Handle Locking -Table 8
CALIBRATION ACCURACY CHECK - Illustration 8
MAJOR CALIBRATION AND REPAIR 8/14
To disassemble the tube 9
To recalibrate the wrench 9/14
Pawl Orientation Chart 10
Pawl Size - Table 11
Pawl Style Chart - Table 11
i
TITLE PAGE(S)
Pawl Identification Code Example 11
Pawl Selection Chart - Table 12
Example #1 with Pawl Selection Chart - Table 13
Example #2 with Pawl Selection Chart - Table 14
To Disassemble and Check Parts 15/17
CAUTION – Positive Spring Pressure 17
To check for positive pressure on the spring 17
HANDLE/LOCK RING REPAIR 18/23
To disassemble the handle/lock ring 18/21
To assemble the handle/ lock ring 21/23
Handle Locking - Table 23
Calibration Instructions for Pre-Set Torque Wrenches 23/24
CDI Pre-Set Torque Wrench Ranges & Adjustment Tool Part Numbers 24
Troubleshooting 24
Micrometer Adjustable Torque Wrench Troubleshooting Matrix 25/26
ii
REVISIONS –
The CDI Micrometer Adjustable Torque Wrench Repair Manual was originated and first
issued in November 2001. The manual will be reviewed and revised as necessary to
assure that it contains the latest changes in product or repair changes. In between
revision, product bulletins may be issued to assure any changes in product or repairs are
supplied to authorized repair facilities.
REV.
Date Issued
Affected Pages
Approved
November 2001
Written By: Donna E. Brunot
Photographs By: Gary Fitzhugh
iii
CDI MICROMETER ADJUSTABLE AND PRE-SET TORQUE WRENCH
REPAIR, MAINTENANCE AND TROUBLESHOOTING INSTRUCTIONS
SAFETY INSTRUCTIONS
Failure to follow WARNING instructions can cause personal injury to the operator.
Failure to follow CAUTION instructions can cause the equipment to fail or break in use.
! WARNING
Always wear Safety Glasses or goggles when using or repairing hand tools.
Read this manual completely before repairing torque wrenches.
DO NOT use or test a wrench that shows signs of damage (bent tubes, cracked or
broken parts) caused by misuse. Recommend replacement.
DO NOT use cheater extensions on the handles or tube to apply torque.
DO NOT exceed rated maximum torque.
Check all sockets or other test accessories for wear, damage or crack prior to their
use with torque wrenches. Do not exceed their rated maximum torque.
Always pull (DO NOT push) to apply torque. Adjust your stance to prevent a fall if
something should give suddenly.
Ratchet head torque wrenches must be checked for full (positive) engagement of the
ratchet in the direction of use prior to applying a load on the wrench. Broken or
slipping ratchets can cause injury.
CAUTION
Periodic recalibration is necessary to maintain accuracy.
Periodic examination and cleaning is necessary to maintain the wrench
Page 1
SURETEST
TORQUE
CALIBRATION
SYSTEM
MULTITEST
TORQUE
CALIBRATION
SYSTEM
ETT
ELECTRONIC
TORQUE
TESTER
Page 2
INTRODUCTION
This manual covers the calibration, repair, maintenance and a troubleshooting guide to
identify and remedy problems that could occur with the CDI Torque Wrenches. Each
wrench model has an Exploded Illustration that lists the component parts and shows
assembly particulars. The exploded illustration must be used as a guide for assembling
CDI Torque Wrenches. CDI has a Service Center that performs repairs and calibration on
all of our products at the factory, plus a list of factory authorized repair/calibration
centers throughout the world. Contact CDI Service Center at (626) 965-0668 or
sales@cditorque.com for technical assistance on the repair or calibration of CDI Torque
Products.
CLEANING
Wipe all exterior parts with a dry, clean and lint free cloth. DO NOT USE any abrasive
or corrosive materials to clean any components of the CDI Torque Wrenches. After
assembly, a non-abrasive polishing agent applied with a dry, clean and lint free cloth may
be used to polish the chrome exterior parts.
LUBRICATION
Super Lube MULTI-Purpose Synthetic Lubrication with Teflon, CDI Part #10-
1000. NO SUBSTITUTES ALLOWED.
REPAIR TOOLS REQUIRED
Micrometer Adjustable Torque Wrenches
*
1
1
2
1
Torque Tester (range determined by the torque wrench to be tested)
Flat blade mini screwdriver (max. blade size .063 or 1.6mm)
End Cutter (modified jaws ground flat on top to allow rivet removal)
CDI Calibration Crank Handle (Pt. # 600-8-1 & 600-8-2) 7/16” & 3/8” hex
0 to 1” micrometer with tenth (.0000) increments
1 16 oz. hammer
1 40 to 200 In. Lb. CDI Torque Wrench
1 3/8” 6 Point Deep Socket
1 7/16” 6 Point Deep Socket
*We recommend that CDI torque testers are used to test the calibration accuracy of
CDI manufactured torque products.
CDI manufactures a complete line of torque testing equipment from moderately
priced testers to complete state of the art test systems used in metrology calibration
laboratories all over the world. Contact CDI Sales Department at (626) 965-0668 or
sales@cditorque.com
for the nearest distributor of CDI Torque Products.
Page 3
OTHER REQUIRED MATERIALS
Torque Seal (Part # 10-1100)
INSPECTION
Inspect all wrenches repaired to determine that they are in an operational condition by
visually inspecting for worn, broken, cracked or damaged parts. Replace parts not found
to be in satisfactory condition.
CAUTION
Some torque wrenches are abused or damage beyond repair. The most common abuse is
using the wrench as a breaker bar to loosen a bolt or nut. This type of misuse is evident if
the tube or the drive is bent in the counterclockwise direction in relation to the tube or
marks from a cheater bar are on the tube or handle. DO NOT REPAIR the wrench if it
shows signs of this type of misuse. The component parts may be permanently damaged.
The SAFETY and INTEGRITY of the wrench could be impaired. Recommend that the
wrench be replaced.
ACCURACY VERIFICATION AND MINOR CALIBRATION PROCEDURE
This procedure is to be used to check the accuracy and, if necessary, perform a minor
adjustment on calibration. It must also be used after a major calibration.
There are two major international standards that establish torque wrench accuracy
requirements. They are ASME B107.14 M Hand Torque Tools (American Society of
Mechanical Engineers) and ISO 6789 Hand Torque Tools – Requirements and Test
Methods (International Organization for Standardization). Both standards are recognized
as established accuracy test methods and referenced in this section. ASME and ISO
standards are subject to review and changes. The repair manual will be reviewed and
revised periodically but may not reflect the latest revisions of the specifications listed
above.
ASME B107.14M
1. Preload the wrench by setting the wrench at 50% of full scale and operating three
times in the direction of the test.
2. Reset handle to 20% of full scale. Place square drive in tester. Adjust the loading
point of the tester until the load is being applied in the center of the handle.
Page 4
3. Test the wrench three (3) times at 20% noting the accuracy error for each reading. Set
and test the wrench three (3) times at 60% and 100% of full scale noting the accuracy
error for each reading. If the readings are within the accuracy requirements for the
direction no calibration adjustment is required.
4. Test the torque wrench in the opposite direction, if required, by following steps 1
through 4 in that direction.
NOTE
The handle support MUST be at the center of the handle when the handle is adjusted to
20%, 60% of scale, and again at 100% of scale. Torque wrench readings, per industrial
(ASME B107.14M-1994) standards, have to be obtained by applying the load to the
center of the handle.
ISO6789
1. Preload the wrench by setting the wrench at 100% of full scale and operating five (5)
times in the direction of the test.
2. Reset handle to 20% of full scale. Place square drive in tester. Adjust the loading
point of the tester until the load is being applied in the center of the handle.
3. Test the wrench five (5) times at 20% noting the accuracy error for each reading. Set
and test the wrench five (5) times at 60% and 100% of full scale noting the accuracy
error for each reading. If the readings are within the accuracy requirements for the
test direction no calibration adjustment is required.
4. Test the torque wrench in the opposite direction, if required, by following steps 1
through 4 in that direction.
Page 5
Minor Calibration Accuracy Adjustment
NOTE
A minor (handle) adjustment is used to adjust 20% of the scale reading. If the reading at
20% and 100% of scale are both either high or low to the required accuracy, a minor
adjustment may be used to bring the accuracy within torque specification. If the torque
wrench requires minor adjustment follow steps 5 through 8.
5. Set the handle at 120% of full scale. Remove the 2plug from the end of the handle.
OR
Plug Removal
6. Check the torque seal on the load screw. If removed or cracked, the wrench
calibration has been tampered with or the handle has been forced below its preset stop
point.
Handle End View
1
All torque wrenches with ¼” head drives must be calibrated at 100% of scale, not minimum (20%)
2
See section on handle/lock ri ng for particulars on button plug or FOD plug removal.
Page 6
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