Page 27 - Parker - Assembly/Installation

4300 Catalog Assembly / Installation
Intru-Lok Assembly

Intru-Lok Assembly Intru-Lok Troubleshooting Guide

The steps to properly assemble the Intru-Lok fitting are: Problems associated with bite type fittings are most often traced
1. Cutting, deburring and cleaning of the tube to faulty Pre-Set/Assembly procedure.
2. Installation
Problem /
Cutting, Deburring and Cleaning Probable Cause Remedy

Cut soft metal tube with tube cutter, circular toothed cut-off saw, Tube not bottomed On soft metal tubing, check for the
or hacksaw with a fine tooth saw blade. A square cut can be indentation on the tube end. For
attained with a hacksaw using Parker’s Tru-Kut Sawing Vise. plastic tubing or soft metal, com-
With a Parker 226 In-Ex deburring tool (see page R22), lightly pare the length from the end of the
deburr the inside and outside corner of the tube end. tube to the front end of the ferrule
of a known good assembly to that
Plastic tube can be cut with a plastic tube cutter, Parker part of the assembly in question. This
number PTC-001 (available from the Parflex Division). assembly should be scrapped.

After cutting and deburring, remove loose burrs or dirt with a Shallow bite Inspect for turned up ridge of
brush or compressed air. material at the front of the ferrule.
A failure to achieve this ridge can
Installation be traced either to the nut not being
tightened enough or the tube not
Intru-Lok fittings are designed to permit tube entry and fitting being bottomed against the stop
make-up without removal of the nut and ferrule from the fitting which allowed the tube to travel
body. The following steps are required for proper installation. forward with the ferrule. In some
1. Insert the tube through the nut and ferrule until it instances this assembly may be
bottoms on the seat within the fitting body. re-worked.
2. Tighten the nut to the finger tight position, then wrench Over-set ferrule More than 1 1/4 turns from finger
tighten 1 1/4 turns. (For low pressure instrument air ser- tight were used to pre-set ferrule, or
vice, 1 turn from finger tight is sufficient. This will also allow the nut was severely over-tightened
for the maximum number of remakes.) in final assembly. This assembly
Note: When using the BIP knurled nut and TIP insert for should be scrapped.
plastic tube, tighten the nut an additional 1 turn from the Ferrule cocked on The ferrule may become cocked on
finger tight position. the tube the tube when the tube end is not
properly lined up with the body.
Remake Generally this condition is caused
by faulty tube bending. All bent
The nut should be wrenched down until a sudden resistance tube assemblies should fit into the
to wrench force is evident. From this point wrench the nut 1/6 fitting body prior to make up. This
turn more to cause the ferrule to spring into its seal against the assembly should be scrapped.
tube and fitting body.
Table S23 – Intru-Lok troubleshooting guide

S27 Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd