Pyrometer
Manufactured in the USA
1 year warranty!
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PyrometerManufactured in the USA1 year warranty! |
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Excessive exhaust temperature can be the greatest damaging factor to the life of
an engine and turbocharger. Exhaust temperature should never exceed the engine
manufacturers specifications.
The most reliable indicator for control of exhaust temperature is a pyrometer.
| CAUSES FOR EXCESSIVE EXHAUST TEMPERATURE Restricted air supply High temperature of intake air or boost Altitude Fuel variations and contamination Turbocharger malfunction Exhaust back pressure Engine timing and fuel system Engine overloading, i.e. operator misuse, misapplication |
EFFECTS OF EXCESSIVE EXHAUST TEMPERATURE Excessive smoking Fuel waste Carbon build-up Lube oil dilution by fuel oil Burned valves Sticking pistons and rings Head gasket failure Turbocharger damage Exhaust manifold cranking Injector failure |
Installation Features:
NOTE: Hewitt pyrometers require no power. NEVER apply vehicle
voltage to pyrometer terminals, damage beyond repair will occur. Only the illuminating
lamp requires voltage.
Instrument Installation: The pyrometer instrument should be mounted
securely to minimize vibration; flexible brackets are not advised. Locate in
best viewing position. If lamp is removed during installation, lamp hole should
be plugged or taped over to prevent dirt or metal particles from contaminating the
movement.
Thermocouple Installation: Various threaded mounting adapters are available,
i.e.1/8 NPT, 1/4 NPT, 3/8 NPT, and 1/2 NPT. If not specified, 1/4 NPT will
be supplied.
Location will vary depending on application and engine. On turbo charged engines,
whenever possible, thermocouple should be installed in manifold before the turbocharger
- this will give the highest temperature indication and the best response time.
Hewitt thermocouples are designed to tolerate this location safely and carry a lifetime
warranty. If mounting pre-turbo is not possible, a lower temperature of 150-200F
will result when mounting after the turbo.
For non-turbo engines, thermocouple may be installed in the manifold before or just
after the exhaust pipe flange, as is convenient.
Connecting terminals have staggered lengths to insure correct polarity, plus color
match to extension wire. A plastic heat shrinkable tube is supplied with the thermocouple
and should be slid over the terminals after connection is made with the extension
wire and shrunk in place with heat for insulation purpose.
Extension Wire: Standard available lengths are 7 ft. minimum, 12 ft.,
and 14 ft. maximum. If longer length is required, 2-conductor 18 gauge wire
may be added between extension wire and instrument, also available color coded from
Hewitt. When installing the extension wire, care should be taken to stay clear
of exhaust system and chafing areas. Secure with tie wraps, etc. to eliminate
wire movement. Terminal connections to pyrometer are designed to insure correct
polarity.
In addition to the gauges listed here, we also provide an impressive list of automotive after market products for car, pickup truck, SUV and 4wd repair parts and accessories that includes rear end covers, ring and pinion gears, OE clutches and heavy duty performance clutches, exhaust brakes, re manufactured manual and automatic transmissions and both manual and automatic overhaul kits. Other products we offer for the RV recreational vehicle market include: REMCO driveline disconnects, tow bar and baseplates and auxiliary overdrive units to improve vehicle performance and save fuel. We have a complete 4 wheeling drivetrain product line including complete differential assemblies, limited slip and other solid locking positractions. We offer transmission conversion kits including the NV4500 and NV5600 as well as replacement kits for light duty GM and Jeep transmissions. You may be interested in visiting our Ford and Powerstroke Diesel page, Dodge Ram and other Jeep pages for detailed information.
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