Page 437 - 4300 Catalog Cover.pdf

4300 Catalog Assembly / Installation
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
T27
Intru-Lok Assembly
The steps to properly assemble the Intru-Lok fitting are:
1. Cutting, deburring and cleaning of the tube
2. Installation
Cutting, Deburring and Cleaning
Cut soft metal tube with tube cutter, circular toothed cut-off saw,
or hacksaw with a fine tooth saw blade. A square cut can be
attained with a hacksaw using Parker’s Tru-Kut Sawing Vise.
With a Parker 226 In-Ex deburring tool (see page S23),lightly
deburr the inside and outside corner of the tube end.
Plastic tube can be cut with a plastic tube cutter, Parker part
number PTC-001 (available from the Parflex Division).
After cutting and deburring, remove loose burrs or dirt with a
brush or compressed air.
Installation
Intru-Lok fittings are designed to permit tube entry and fitting
make-up without removal of the nut and ferrule from the fitting
body. The following steps are required for proper installation.
1. Insert the tube through the nut and ferrule until it
bottoms on the seat within the fitting body.
2. Tighten the nut to the finger tight position, then wrench
tighten 1 1/4 turns. (For low pressure instrument air ser-
vice, 1 turn from finger tight is sufficient. This will also allow
for the maximum number of remakes.)
Note: When using the BIP knurled nut and TIP insert for
plastic tube, tighten the nut an additional 1 turn from the
finger tight position.
Remake
The nut should be wrenched down until a sudden resistance
to wrench force is evident. From this point wrench the nut 1/6
turn more to cause the ferrule to spring into its seal against the
tube and fitting body.
Intru-Lok Troubleshooting Guide
Problems associated with bite type fittings are most often traced
to faulty Pre-Set/Assembly procedure.
Table T24 – Intru-Lok troubleshooting guide
Problem /
Probable Cause Remedy
Tube not bottomed On soft metal tubing, check for the
indentation on the tube end. For
plastic tubing or soft metal, com-
pare the length from the end of the
tube to the front end of the ferrule
of a known good assembly to that
of the assembly in question. This
assembly should be scrapped.
Shallow bite Inspect for turned up ridge of
material at the front of the ferrule.
A failure to achieve this ridge can
be traced either to the nut not being
tightened enough or the tube not
being bottomed against the stop
which allowed the tube to travel
forward with the ferrule. In some
instances this assembly may be
re-worked.
Over-set ferrule More than 1 1/4 turns from finger
tight were used to pre-set ferrule, or
the nut was severely over-tightened
in final assembly. This assembly
should be scrapped.
Ferrule cocked on The ferrule may become cocked on
the tube the tube when the tube end is not
properly lined up with the body.
Generally this condition is caused
by faulty tube bending. All bent
tube assemblies should fit into the
fitting body prior to make up. This
assembly should be scrapped.
Intru-Lok Assembly