408-8739 Datasheet, PDF (4/6 Pages) TE Connectivity Ltd – Cumulative Trauma Disorders can result from the prolonged use of manually powered hand tools

408-8739
6. Remove and inspect the contact.
7. Make another sample crimp. If the contact is
straight, tighten the contact support screw. If the
contact is still being bent during crimping, repeat the
adjustment procedure.
5.2. Ratchet Adjustment
The tool ratchet mechanism features an adjustment
wheel with numbered settings. The adjustment wheel
controls the amount of handle pressure exerted on the
jaws during crimping. If the crimp is not acceptable,
adjust the ratchet as follows:
1. Remove the lockscrew from the ratchet
adjustment wheel. Refer to Figure 4.
2. Using a screwdriver, adjust the ratchet wheel
from the front of the tool.
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.
Screwdriver
Ratchet Adjustment
Wheel
Lockscrew
Figure 4
4. Re-install the lockscrew.
5. Make a sample crimp. If the crimp is acceptable,
the adjustment setting is correct. If the crimp is
unacceptable, continue to adjust the ratchet, and
again measure a sample crimp.
3. Remove all lubrication and accumulated film from
the dies by immersing the dies in a suitable
commercial degreaser.
6.2. Visual Inspection
1. Inspection of the tool and dies should be made on
a regular basis to ensure that they have not become
worn or damaged.
2. Make sure that the proper die retaining screws
are properly secured.
3. Inspect the crimping chambers of the die
assembly for flattened, chipped, worn, or broken
areas. If damage or abnormal wear is evident, the
dies must be replaced. Refer to Section 7,
REPLACEMENT AND REPAIR.
6.3. Crimp Height Inspection
Crimp height inspection is performed through the use
of a micrometer with a modified anvil, commonly
referred to as a crimp height comparator. Refer to
instruction sheet 408-7424 for detailed information on
obtaining and using a crimp height comparator.
Inspect the crimp height as follows:
1. Refer to Figure 5, and select a maximum size
wire for each crimping chamber as listed.
2. Crimp the contact according to Section 3,
CRIMPING PROCEDURE.
3. Using the crimp height comparator, measure the
wire barrel crimp height as shown in Figure 5. If the
crimp height conforms to the dimensions provided,
the tool is considered dimensionally correct. If the
crimp height does not conform to the dimensions
provided, the tool must be adjusted. Refer to
Paragraph 5.2, Ratchet Adjustment.
Point on Center
of Wire Barrel
Opposite Seam
Note: Not to Scale
A
Modified
Anvil
6. MAINTENANCE AND INSPECTION
6.1. Maintenance
1. Ensure that the tool frame and dies are clean by
wiping them with a clean, soft cloth. Remove any
debris with a clean, soft brush. Do not use objects
that could damage any components.
2. When not in use, keep tool handles closed to
prevent objects from becoming lodged in the dies,
and store in a clean, dry area.
WIRE SIZE
(AWG)
18
16
CRIMPING CHAMBER
MARKING
18
16 (Fluoropolymer)
Figure 5
CRIMP HEIGHT
DIMENSION A
±0.05 mm [±.002 in.]
(mm [in.])
1.37 [.054]
1.50 [.059]
Rev B
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