Instruction Sheet

Terminating Head 58247- 1

For MTA- 156 Receptacle Connectors

408--6930

LOC B

1

of 5

E

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19 APR 11 Rev F

Using Discrete Wire

Figure 1

Locating

Pawl

Adjuster

(Insertion Rod)

Wire

Inserter

Feed

Slide

Tool

Base

With Lock

(Ramp)

Without Lock

(Ramp)

With Lock,

With Polarizing

Tabs

Without Lock,

With Polarizing

Tabs

Mass Termination Assembly (MTA)--156

Insulation Displacement Contact (IDC)

Closed--End Receptacle Connectors

1. INTRODUCTION

Terminating Head 58247--1 (shown in Figure 1) is

designed to terminate discrete wire in MTA--156 IDC

closed--end receptacle connectors with or without lock

(ramp) and with or without polarizing tabs. Slotted

contacts for insulation displacement termination are

pre--assembled on 3.96--mm [.156--in.] centerlines in

each color--coded housing for a specific wire size.

The head must be installed in Pistol Grip Manual

Handle Assembly 58074--1 or Pistol Grip Pneumatic

Handle Assembly 58075--1. For head installation and

removal, refer to Instruction Sheet 408--6790 for the

manual handle assembly and 408--6789 for the

pneumatic handle assembly.

For detailed connector description and application

requirements, refer to Application Specification

114--1020.

Read these and all referenced instructions thoroughly

before using the head.

All numerical values in this instruction sheet are

in metric units [with U.S. customary units in

brackets]. Dimensions are in millimeters [and

inches]. Figures are not drawn to scale.

Reasons for reissue of this instruction sheet are

provided in Section 8, REVISION SUMMARY.

2. DESCRIPTION

The head serves as a guide and support for the

connector during termination. Features of the head

(shown in Figure 1) and their function are as follows.

Wire Inserter — forces the wire into the two slotted

beams of the contact. Note that it provides support for

the contact beams when applying insertion force on

the wire.

Adjuster (Insertion Rod) — is a piston for the wire

inserter and regulates wire inserter travel.

Feed Slide — automatically positions the connector

after each termination.

Locating Pawl (or Anti--Backup Pawl) — aligns the

connector for insertion, and retains it during

termination.

3. SETUP AND TEST INSPECTION

The adjuster (insertion rod) is preset for wire sizes

26 through 18 AWG. If the wire is being inserted too

deeply or not deeply enough inside the contact, it may

be necessary to adjust the depth of the wire inserter

or, in addition, if the pneumatic handle assembly is

being used, it may be necessary to adjust the air

pressure. Proceed as follows:

3.1. Setup

1. Determine the wire size, and select the

appropriate color--coded connector from Figure 2.

WIRE SIZE (AWG)

CONNECTOR COLOR CODE

26

Blue

24

Natural

22

Red

20

Yellow

18

Orange

Figure 2

NOTE

i