408-8579

3 of 5

Rev C

6. Allow the tool handles to open fully and remove

the crimped connector from the dies.

Damaged product should not be used. If a

damaged contact or ferrule is evident, it should be

replaced with a new one.

The tool frame assembly ratchet mechanism features

an adjustment wheel with numbered settings. If the

crimp height is not acceptable, adjust the ratchet as

follows:

1. Remove the lockscrew from the ratchet

adjustment wheel.

2. With a screwdriver, adjust the ratchet wheel from

the opposite side of the tool.

Figure 4

3. Observe the ratchet adjustment wheel. If a tighter

crimp is required, rotate the adjustment wheel

COUNTERCLOCKWISE to a higher-numbered

setting. If a looser crimp is required, rotate the

adjustment wheel CLOCKWISE to a lower-

numbered setting.

4. Replace the lockscrew.

5. Make a sample crimp and measure the crimp

height. If the crimp height is acceptable, secure the

lockscrew. If the dimension is unacceptable, remove

lockscrew and continue to adjust the ratchet, and

again measure a sample crimp.

6. MAINTENANCE AND INSPECTION

6.1. Maintenance

1. Remove dust, moisture, and other contaminants

with a clean, soft brush, or a clean, soft, lint-free

cloth. Do NOT use any objects that could damage

the dies or tool.

2. Make sure that the proper die-retaining screws

are properly secured.

3. When the dies are not in use, store them in a

clean, dry area.

4. Store the tool with the tool handles closed to

prevent objects from becoming lodged within the

jaws.

6.2. Inspection

1. Remove all lubrication and accumulated film from

the dies by immersing the dies in a suitable

commercial degreaser.

2. Make certain that all die-retaining screws and die

components are properly secured.

3. Inspect the crimping surfaces for flattened,

chipped, worn, or cracked areas. If damage is

evident, the dies must be replaced. Refer to Section

7, REPLACEMENT.

6.3. Measuring the Die Opening

The die assembly will perform correctly as long as:

that the openings are correct, and

provides information on die opening sizes.

Die assembly 91901-1 will require a center contact

crimp height inspection using a micrometer with a with

a modified anvil as shown in Figure 6. Tyco

Electronics does not manufacture or market these

gages. However TE recommends use of the modified

micrometer (Crimp Height Comparator) found in

408-7424. Refer to 408-7424 for instructions and

ordering information of the crimp height comparators.

Proceed with center contact crimp height inspection as

follows:

1. Select an appropriate center contact and cable.

2. Crimp a test center contact.

3. Using crimp height comparator, measure wire

barrel crimp height as shown in Figure 6. If the

crimp height conforms to that shown in the table,

the tool is considered dimensionally correct. If not,

return the tool to Tyco Electronics for evaluation and

repair (refer to Section 7, REPLACEMENT).

CAUTION

!

Screwdriver

Ratchet Adjustment

Wheel

Lockscrew (Typ)