LOC B

3. MAINTENANCE/INSPECTION PROCEDURE

Tyco Electronics recommends that a maintenance-

inspection program be performed periodically. This is

result in the same dependable and uniform

terminations for which the dies were designed.

We recommend an initial frequency of inspection of

once a month. This frequency may be adjusted to suit

your requirements through experience. The frequency

of an inspection is dependent upon:

•

The care, amount of use, and handling of the dies.

• The degree of operator skill.

• The presence of abnormal amounts of dust and

dirt.; and

• Your own established standards.

With proper maintenance and inspection, these dies

will give years -of satisfactory service.

All Tyco Electronics dies are thoroughly inspected

before being shipped from the factory, however, since

there is a possibility of die damage in shipment, it is

recommended that new dies be inspected in

accordance with Section 3 when received in your

plant.

3.1. Cleaning

Do not allow deposits of dirt, grease and foreign

matter to accumulate in the die closure area and on

the bottoming surfaces of the dies. These deposits

may prevent the dies from bottoming fully and may

also cause excessive wear in the die closure surfaces,

thereby affecting the quality of the crimp. The dies

should be wiped clean frequently with a clean cloth.

3.2. Visual Inspection

Visually inspect the die closure surfaces for broken or

chipped conditions. Although dies may gage within

permissible limits, worn or damaged die closure

surfaces are objectionable and can affect the quality

of the crimp. Examples of possible damaged die

surfaces are shown in Figure 13.

3.3. Die Closure Inspection

Every Tyco Electronics die set is inspected and tested

for proper die closure before being shipped from the

factory. An inspection should, however, be performed

periodically to measure the die closure.

Figure 13

The die closure inspection is accomplished using GO

NO-GO plug gages. Tyco Electronics neither

manufactures nor sells plug gages, however, a

suggested plug gage design and the GO NO-GO

dimensions of the plug gage members are listed in

Figure 14. The following procedure is recommended

for measuring the die closures.

Refer to 408 -7424 for ordering information and for

information concerning the GO NO-GO gages.

1. Remove traces of oil or dirt from die crimping

area and plug gage members.

2. Insert dies in tool.

3. When using hand tool, close handles of tool

until dies bottom. Do not apply additional

pressure to tool handles.

4. When using pneumatic tool, reduce air supply

pressure to a range between 15-20 p.s.i.

Depress trigger to bottom dies.

5. With crimping dies bottomed, check the die

closure using the proper plug gage. Hold gage in

straight alignment with the die closure and

carefully try to insert without forcing, the GO

member, and then the NO-GO member. See

Figure14. The GO member must pass

completely through the die closure.

NOTE

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408-1662

Rev A