Auto Meter 4744 - Manual

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 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.
A) Pre-existing 1 ⁄ 11 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.
B) Weld Fitting: Drill a 9 ⁄ 99 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.
C) 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
1 ⁄ 11 4 ⁄⁄ ’’ diameter hole about 6’’ down from the junction of the the exhaust pipe to manifold junction. Remove the 1 ⁄ 11 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 1 ⁄ 11 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 gently (washer is fragile) push the white ceramic washer over the
probe using a 1 ⁄ 11 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 1 ⁄ 11 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.
D) Drill & Tap into Manifold Method: You may drill a cast iron manifold with a 5 ⁄ 55 16 ⁄⁄ ” letter R (.339) drill bit and follow through with a 1 ⁄ 11 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
11 ⁄ 11 11 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
1 ⁄ 8 ⁄⁄ ” NPT
INSTALLATION INSTRUCTIONS
2
1
/
16
// ” & 2
5
/
55
8
// ” 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)
1 ⁄ 11
4
⁄⁄ ’’ box
end
wrench
White
Ceramic
Washer
Gently push washer over probe
using
1 ⁄ 11
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 Probe Tip
Screw
Collar
Stainless
Clamp
Middle
2 / 3
White
Ceramic
Washer
WARNING: Fibers from
white ceramic washer
may irritate skin.
Wash hands after
handling washer.
Drill 5 ⁄ 55 16 ⁄⁄ ” letter R (.339)
Hole and tap for 1 ⁄ 11 8 ⁄⁄ ” NPT
in cast exhaust manifold
collector or other engine
builder specified location.
Weld
Fitting Fitting