PYROMETER

Generally speaking, turbo's = more fuel/more air/ more heat.  The pyrometer is to monitor exhaust temps, so you don't get melt pistons etc. 

Some of the IH 86 series had pyrometers on them from the factory, if i remember right. I used to have one on my 7060, DRI was the brand but the probe quit. I should find another probe.

An EGT(exhaust gas temperature) of < 1350 F degrees is usually recommended on most mfg’ers stock turbo diesel engine. A prolonged or constant load at/or over that temperature will usually cook the engine. A EGT of 1150-1200F might be ok all day long, but a spike to 1300-& higher should not be long (seconds??) before damage happens. Increasing the engine’s oil capacity helps dissipate increased engine heat(larger oil pan). An intercooler using radiator coolant to cool intake air will help too. Most operators do not realize that a loaded tractor/truck’s turbo Can add 300-500 F degrees as it compresses intake air. In theory, 80F degree outside air plus turbo compression of 420F, minus 190F intercooler coolant equates 310F combustion intake air. In actuality, those numbers may not be that efficient. Common turbo/aftercooled(air-to-air) at 80F outside air, truck EGTs may be;
- AT IDOL, 350-400F,
- Economically loaded, 600-800F,
- Heavily loaded, 1000-1200F.
So an OTR trucker, running at 60F night, usually sees more engine torque, better fuel efficiency, & easier on truck components. Same principles may apply to farm tillage work at night. The older tractor intercooler’s 190F coolant TRIES to reduce intake air before it enters combustion chamber. Few, if any 1960-1980s farm tractor mfg’ers in the USA factory installed a pyrometer. In many cases, the tractor’s radiator coolant temp gauge was probably the only operator indicator of higher EGTs??? How often do you hear complaints like, “I’ve blown out the radiator, but I still Can’t seem to keep that tractor’s temp out of the RED!”
So a pyrometer installed in the exhaust manifold, just prior to the turbo, will read EGT that is usually displayed in the cab’s dash EGT gauge for operate to monitor. It helps que operator as to the level of load of the tractor/truck. If EGT climbs, then Operator could then reduce engine throttle, gear down, lift or reduce trailing equipment load(farm tillage, silage chopper, etc...?). A truck driver would do similar adjustments. In both power units a lower EGT usually equates to better fuel economy(lighter foot).

Edited by AC7060IL - 25 Feb 2019 at 3:28am

The Detroits were known as "screamin road oilers".