Auto-meter 4744 User Manual download pdf

Begin by installing the Thermocouple in the exhaust, then work back to the gauge. For turbo engines, install the probe 1-2 inches from the turbo exhaust outlet or

you may install the probe prior to the turbo. You may consult an engine builder or tuner for recommendations for which probe location is best for you. If installing

pre-turbo, removal of the pipe or manifold may be necessary to avoid metal shavings in the turbo. For non-turbo engines, install the probe 1-2 inches from the

cylinder head. The probe can be mounted three different ways, so please use the method best suited for your needs.

Pre-existing

⁄

⁄8⁄

” NPT Threaded Hole:

Simply screw the threaded fitting into the hole, insert the probe and tighten the nut already on the probe from the factory.

Make sure the probe is oriented so the wires do not come in contact with, or become too close to, the manifold or other hot engine parts.

Weld Fitting:

Drill a

⁄

⁄16⁄

” hole and weld in the supplied bushing being careful not to distort the bushing. The bushing must be welded and not braised into the

manifold or exhaust header. Screw the threaded fitting into the hole, insert the probe and tighten the nut already on the probe. Make sure the probe is oriented so

the wires do not come into contact with, or become too close to, the manifold or other hot engine parts.

Stainless Clamp Method:

This method is

for the applications that require frequent removal of the manifold or the header for service, or just faster and easier

installation. Drill a

⁄

⁄4⁄

’’ diameter hole about 6’’ down from the junction of the the exhaust pipe to manifold junction. Remove the

⁄

⁄8⁄

’’ NPT bushing from the probe and

replace it with the stainless clamp and set screw collar provided. Undo the clamp and slide the probe into the

⁄

⁄4⁄

’’ hole in the clamp. Slide the set screw collar onto

the probe. Before tightening the collar in position make sure that when inserted, the probe will have it’s tip in the middle two-thirds of the exhaust stream.

(It is not

necessary to go beyond the half way point.)

Once screw collar is tightened in the correct position,

gently

(washer is fragile) push the white ceramic washer over the

probe using a

⁄

⁄4⁄

” box end wrench. Push the washer on until it is up against the screw collar.

Hold the clamp open when inserting the probe into the

⁄

⁄4⁄

’’ hole. Re-join

the clamp ends and tighten in position so the wires will not get close to the hot manifold/exhaust pipe. See the Illustration below for details.

Drill & Tap into Manifold Method

: You may drill a cast iron manifold with a

⁄

⁄16⁄

” letter R (.339) drill bit and follow through with a

⁄

⁄8⁄

” NPT pipe tap.

2. With your probe installed, the extension wire can now be connected to the probe and routed to the gauge. Pull the large shrink tube back from the screw connections

on the probe. Attach the staggered end of the extension wire with the small (No. 6) ring terminals to the probe using the #6 screw and self locking nuts. Attach them

Red to Red and Yellow to Yellow. Slide the shrink tube over the staggered connections to protect them. Do not shrink this tube until after the installation is complete,

and correct operation is verified. If a heat source is not available the open ends may be closed with wire ties.

3. The extension wire is an integral part of the pyrometer calibration. It may not be shortened or lengthened without effecting the gauge calibration. You’ll need to

determine a suitable location to coil the excess and tie it loosely with a wire tie.

(Loosely tieing the excess coil prevents embritlement caused by vibration.)

Pass the

extension wire through the fire wall using an existing hole or drill a

⁄

⁄32⁄

’’ (.343’’) diameter hole and use the rubber grommet provided to protect the wire from damage.

Route the wire to the gauge and connect the No. 8 terminals to the studs on back marked Yellow+ and Red-. Fasten using split lockwasher and brass nuts provided.

Coil excess

with

wire tie

Slide shrink

tube over

staggered

connections

⁄

⁄8⁄

” NPT

INSTALLATION INSTRUCTIONS

” & 2

” PYROMETERS

For EGT models with probe included

2650-1129A

Important

Pyrometers are sensitive, high accuracy instruments. They must be handled and installed with care to insure proper

performance. Carefully read and follow these instructions, and your pyrometer will provide you with a long and accurate life.

Probe Installation

Stainless Clamp Method (C)

⁄

⁄4⁄

’’ box

end

wrench

White

Ceramic

Washer

Gently push washer over probe

using

⁄

⁄4⁄

’’ box end wrench.

(Washer is fragile.)

QUESTIONS

If after completely reading these instructions you have questions regarding the operation or installation of your instrument(s),

please contact Auto Meter Technical Service at

815-899-0801.

You may also email us at

[email protected].

Additional information can also be found at

http://www.autometer.com

Pre-existing Hole & Weld Fitting (A & B)

Drill & Tap into Manifold (D)

Probe Tip

Screw

Collar

Stainless

Clamp

Middle

White

Ceramic

Washer

WARNING:

Fibers from

white ceramic washer

may irritate skin.

Wash hands after

handling washer.

Drill

⁄

⁄16⁄

” letter R (.339)

Hole and tap for

⁄

⁄8⁄

”

NPT

in cast exhaust manifold

collector or other engine

builder specified location.

Weld

Fitting

1 2

WARNING: 1
12 MONTH LIMITED WARRANTY 2

Summary of Contents

Page 1 - WARNING:

1. Begin by installing the Thermocouple in the exhaust, then work back to the gauge. For turbo engines, install the probe 1-2 inches from the turbo e

Page 2 - 12 MONTH LIMITED WARRANTY

INSTALLATION INSTRUCTIONS21/1/116/16/” & 25/5/58/8/” PYROMETERSFor EGT models requiring purchased probeInstallation21⁄1⁄116⁄16⁄” Pyrometer Back Vi

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