Checkline TSN User Manual

TSN (Cam-Over Wrench) Operating Instructions

Rev 2.0 (March 20, 2008)

Calibrating Torque Wrenches

To calibrate torque wrenches either use a torque analyzer or torque transducer within the range of the torque wrench. For
cam-over torque wrenches calibrate torque in “Peak” mode with an analyzer or transducer. Make sure you apply the torque
slowly and smoothly.

1. Select a torque analyzer or transducer that covers the torque range of the TSN
wrench. Connect wrench to the torque analyzer or transducer.

2. Apply torque clockwise slowly until wrench ‘slips’ and note reading.

3. Adjust wrench to required torque setting.

4. Test and repeat adjustment as necessary to obtain desired value.

5. Recalibrate torque wrench at prescribed intervals.

Adjusting Torque Setting

1. Remove end cap from wrench and insert special adjusting key.

2. The special Adjusting Key is an articulated design. When in use the two
halves are set at 90º, this allows downward force to be exerted on the
Sliding Lock while rotating the Adjusting Screw.

3. Turn clockwise to increase torque and counter clockwise to decrease
torque. Do not adjust torque above or below the recommended
torque ranges. Tighten end cap back on.

Adjusting

Key

Construction & Operation of M-TALD System

The TSN wrenches now feature the new M-TALD (Mechanical Torque Adjustment Locking Device) system. The M-TALD is an
easy to use locking device for adjusting the torque of the TSN. It's a positive, mechanical locking system that does not rely on
friction for movement, and does not require a secondary locking device. It's operated using a single key.

1. M-TALD comprises of three main parts: The Adjusting screw,
the spring-loaded Sliding Lock and the Castellated Lock
Ring. These are assembled into a single, self-contained unit
and held together by a retaining ring.

Sliding Lock Engaged

Location Lug

Adjusting Screw

2. The assembly is screwed into the wrench handle tube, with
the location lugs of the Lock Ring engaging with specially
formed grooves.

3. An inward force has to be exerted onto the Sliding Lock,
through the special adjusting key, while the Adjusting
Screw is being rotated.

4. As soon as the inward force is released, the spring-loaded
Sliding Lock engages with the teeth of the Lock Ring,
further rotation of the Adjusting Screw is not possible.

Sliding Lock

Retaining Ring

Castellated
Locking RIng

5. The Castellated Lock Ring has ten teeth, allowing the
Adjusting Screw to be set at increments of 36º. The
resolution of each increment varies with each model of
the tool and are, generally, as follows:
TSN 25 0.15 Nm
TSN 55 0.6 Nm
TSN 125 1.0 Nm

Applying Torque

1. Tighten nut or bolt by applying a steady even pull using
built in ratchet as necessary. Wrench should be kept at
90 degrees to axis of bolt during tightening. When
pre-set torque is reached, the wrench will ‘slip.’

2. The wrench will automatically reset itself for the next
application.

3. With its unique design, it’s impossible to over tighten
beyond the preset load.

TSN (Cam-Over Wrench) Operating Instructions

Rev 2.0 (March 20, 2008)

TSN Maintenance Schedule

Expected Tool Life

With normal use – 100,000 operations

Initial Settling in Period

1500 operations, during which frequent calibration checks are recommended.

Period between Resetting of Torque

5000 operations (as recommended in BS EN 26789:1994). It is acknowledged that some TSN tools achieve 5000 operations
in a relatively short period of time. Under these circumstances the User may decide, with the benefit of their experience, to
increase the period between calibration checks.

Routine Maintenance

After 100,000 operations, strip, clean & re-grease the Spindle, Cam & Roller. Any worn components should be replaced.

Note: Any tool that is dismantled during its life must be re-lubricated in accordance with the Mountz recommendations. Do not
clean tools by immersing them in solvent, as this will destroy the internal lubrication and cause failure of the tool.

Tool Lubrication Chart for TSN

Gulf

Gulflex Moly

Temp Range

-1 to 120 C

or equivalent

General - except

Roller & Cam

Ratchet

TSN Cam/Spindle Replacement Procedure - Overview:

This procedure has been prepared in response to requests from authorized Mountz Distributors who wish to Service and
Replace components in the head assembly of TSN wrenches.

Tools and Materials:

- Rear bearing removal tool - to suit model of TSN being serviced

- Rear bearing insertion mandrel - to suit model of TSN being serviced

- Normal Workshop tools

- Replacement parts as necessary

- Anti-scuffing paste - ROCOL ASP recommended

- Light machine oil

Silicon Grease

RS 555-083

Temp Range

-50 to + 200 C

“O” Rings Ratchet Roller & Cam

Shell Tonna 32

Lubricating Oil

Total

Drosera 68

Rocol ASP

Anti-Scuffing paste

Life Time Lubrication

Max Temp 450 C

Procedure

1. The external parts of the TSN should be cleaned. The dust cap at grip end of handle removed and the torque adjustment
mechanism slackened off just to the point where the square drive of the TSN can freely rotate in both directions. This
indicates that the roller is no longer in engagement with the cam. Do not slacken the adjustment screw further than this
point as the roller will become disengaged from the roller guide and may be difficult to relocate.

2. Remove the Spirolox retaining ring from the underside of the head assembly.

3. Gentle tapping of the head assembly against a wooden block (as per sketch) will eject the cam/spindle assembly complete
with cover plate and front bearing from the TSN head. This may also cause the spindle and pawls to be ejected from the
cam. If this occurs take care not to lose the pawls or pawl springs.