Sturtevant Richmont SLTC Series Operating instructions

Sturtevant Richmont
Local Reach.. Global Support.
555 Kimberly Drive
Carol Stream, Illinois 60188
Phones: 847/455-8677 800/877-1347
Fax: [phone]
Website: www.srtorque.com
E-Mail: [email protected]
Service and Operating Instructions Instructions
SLTC, SLTCS and SLTCR Series Switch Torque Wrenches
Applicable Products
P/N Model Description
810230 SLTC 150I Switch Wrench, hardwire, 150 in.lbs./17 Nm cap., preset, dovetail
810231 SLTC 300I Switch Wrench, hardwire, 300 in.lbs./34 Nm cap., preset, dovetail
810232 SLTC 750I Switch Wrench, hardwire, 750 in.lbs./85 Nm cap., preset, dovetail
810233 SLTC 1800I Switch Wrench, hardwire, 1800 in.lbs./204 Nm cap., preset, dovetail
810155 SLTC 3600I Switch Wrench, hardwire, 3600 in.lbs./408 Nm cap., preset, dovetail
810152 SLTCS 7200I Switch Wrench, hardwire, 7200 in.lbs./813 Nm cap., preset, 3/4” fixed Sq. Dr.
810154 SLTCR 7200I Switch Wrench, hardwire, 7200 in.lbs./813 Nm cap., preset, 3/4” Sq. Dr. ratchet
Introduction
Sturtevant Richmont preset torque wrenches are designed and manufactured to provide consistent user-selec-
table torque in high-cycle applications.
All of these torque wrenches are designed and equipped to provide hardwire electric communication of the start
and finish of the “click” of the wrench. They may be used with the S/R Programmable Torque Verifier (PTV) or
wired directly to a PLC to asist in error-proofing the assembly process. The SLTC-Series tools use the S/R dove-
tail system and accept all S/R Interchangeable Heads. The SLTCS has a fixed square drive, and the SLTCR has
a ratcheting square drive instead of the dovetail.
These tools indicate torque in the clockwise direction only as indicated on the wrench case. The tools may be
used in the opposite (CCW) direction but will not indicate torque. When using the tools in either direction care
must be taken not to exceed the capacity of the wrench.
Torque Setting- Equipment
To set the torque on these torque wrenches the following are needed:
1. A torque tester of accuracy equal to or greater than 1% of indicated value.
2. An S/R CART Tool (Calibration and Removal Tool).
3. For SLTC-Series tools, an appropriate S/R Interchangeable Head of the
same common centerline length as will be used on the tool during
assembly is also needed.
SLTC-Series Torque Wrench. The Switch
Assembly is the same on all Switch Wrench
series and capacities, and the torque pre-
setting procedure is the same for all.
The electric ratings are the same for all
SLTC-, SLTCR, and SLTCS-Series Switch Wrenches. The rating is 60 VAC/75 VDC at 3 Amperes maximum.

Torque Setting - Procedure
1. Insert the Torque Adjustment Key into the wrench as shown. The Locking
Key should not yet be engaged. The Torque Adjustment Key will slide easily
into the center of the wrench adjustment mechanism. Some slight rotation
of the key may be necessary to assure it fully engages the torque adjust-
ment mechanism.
2. Insert the Locking Key into the jam nut by sliding it forward on the CART
Tool. Only finger pressure will be needed to tell when the Locking Key
meets the jam nut. It may be necessary to slightly rotate the Locking Key to
allow the hex on the key to engage the hex on the nut. When the engage-
ment occurs, you will feel the Locking Key slide further forward slightly.
3. Hold the Locking Key
in position and rotate
the Torque
Adjustment Key
slightly clockwise to
insure the jam nut is
disengaged from the
torque adjustment
mechanism.
4. Engage the square drive of the torque wrench to the tester. The drive must
be fully engaged for proper testing. Check the current torque setting before
making any torque setting adjustments.
5. With the wrench still engaged to the tester, grasp the wrench grip and rotate the CART Tool slightly clock-
wise to increase the torque setting or
slightly counter-clockwise to
decrease the torque setting. If there
is a large difference between the
current torque level and the desired
setting, repeat the rotation several
times, while checking the torque
between adjustments. The greater
the amount of rotation, the greater
the change in torque. Care should
be taken not to exceed the maximum torque; small amounts of rotation between tests on the tester are rec-
ommended. Continue adjusting and checking until the desired torque is attained.
6. Grasp the wrench and the CART Tool. Hold the Adjustment Key in place and rotate the Locking Key clock-
wise until it jams against the
torque adjustment mechanism.
This will be felt as firm resistance
to further rotation. Then hold the
Locking Key in place and attempt
to rotate the Adjustment Key
counter-clockwise. It should not
move more than a small fraction of a turn. When that is complete, the torque is set and locked in place.

Using the Torque Wrench
1. Attach the appropriate fastener engagement device to the tool (socket or interchangeable head). It is imper-
ative that the interchangeable head used on the SLTC have the same common centerline length as that
used in presetting the torque.
2. Engage the fastener completely with the socket or interchangeable head.
3. Grasp the center of the vinyl grip and with a steadily-increasing force move the wrench in the direction of the
torque arrow on the case.
4. Continue increasing the force until an audible and/or tactile impulse (the “click”) is experienced.
5. Immediately stop applying force to the wrench.
Connecting the Torque Wrench to the Programmable Torque Verifier (PTV)
The SLTC, SLTCS and SLTCR-Series torque wrenches have a threaded connector on the Switch Module, and
the PTV has a two-prong connector on its side. Attach the Switch Wrench to PTV cable to the wrench, then to
the PTV.
Connecting the Switch Wrench to a Programmable Logic Controller (PLC)
A special cable, ordered separately, is required to attach these tools to a PLC. This cable has a threaded con-
nector for the switch wrench and it has bare wires for attaching to the PLC I/O connections. Attach the cable to
the I/O connections, then attach the cable to the switch wrench.
Servicing the Switch Assembly - Necessary Tools
To perform any service on the switch mechanism the fol-
lowing tools will be needed:
1. One hex key, 1/16”.
2. One hex key, 0.050”
3. One flat tip screwdriver, with 1/8” wide blade
Key to Photograph
1. Box Lid
2. Threaded Connector
3. Chassis Plate
4. Tapped Screw Hole
5. Trigger Set Screw (P/N 890002)
6. Microswitch Trigger
7. Microswitch (P/N 811142)
8. Microswitch Mounting Screws (P/N 890010)
Servicing Procedures
Box Lid Removal
1. Use the 1/8” flat tip screwdriver to remove the four machine screws (P/N 890011) holding the Box Lid in
place.
2. Carefully remove the Box Lid. This will leave the internal components accessible as shown in photograph
above.
Microswitch Replacement
1. To remove the Microswitch, use the 0.050” hex key to loosen and remove the Microswitch Mounting Screws.
2. Lift the Microswitch off the Chassis Plate.
3. Disconnect the wires.
4. Connect the wires to the new Microswitch.
5. Position the Microswitch as shown in the photograph above and install the two Microswitch Mounting
Screws.

Trigger Set Screw Replacement
1. Use a 1/16” hex key to remove the Trigger Set Screw.
2. Apply two drops of Perma-Lok MM115 thread adhesive (or equivalent) to the leading threads on the new
Trigger Set Screw. This prevents loosening of the screw during wrench use.
3. Insert the replacement Trigger Set Screw into the hole and into the tapped hole in the tang. Snug the Trigger
Set Screw with the 1/16” hex key.
Tang Replacement
If it is necessary to replace the tang, please contact your distibutor to determine and order the correct tang for
the tool. The Trigger Set Screw will need to be removed before replacing the tang, and reinstalled after the tang
is replaced. See the procedure immediately before this one.
Ratchet Replacement (SLTCR Only)
To replace the ratchet you will need a pair of inside snap ring pliers, a 1/8” or 3mm flat tip screwdriver and the
correct Ratchet Renewal Kit (P/N 816997).
1. Use the snap ring pliers to remove the snap ring.
2. Lift the square drive and washer straight out of the ratchet housing.
3. Remove slide pin and ball. Use caution - the ball is under the slide pin and is spring loaded.
4. Remove the spring.
5. Clean the inside of the ratchet housing thoroughly.
6. Insert the new spring into the recess for it.
7. Place the new ball on the spring.
8. Use the flat tip screwdriver to compress the ball and spring while sliding the new slide pin over them until
both sides of the housing are engaged by the slide pin.
9. Center the slide pin and insert the new square drive into the housing.
10. Place the new washer on the square drive.
11. Use the snap ring pliers to install the new snap ring.
Care and Cleaning
Always store the wrench in a clean and dry environment. To clean the wrench wipe off dirt and grease with a
clean moist cloth. Do not immerse the wrench in cleaning fluids. If the wrench is to be stored for an extended
period of time, return the wrench to its’ lowest torque setting (20% of capacity) before storing it.
Repair Parts, Service, and Certification
Repair parts, service and certification may be obtained through your S/R distributor.
Any style or type of device that changes the overall length of the wrench when used on it will have an effect on
the torque output. Always set the torque with such device in place.
Caution
• Always wear safety glasses when working with hand tools.
• Always make certain that the fastener engagement device properly engages the fastener before applying
torque.
• Do not exceed the rated capacity of the torque wrench for any reason.
• Every torque wrench should be checked for accuracy periodically.
For further assistance or parts diagrams, contact us using the information provided on the front of this document.
857010E