Tyre in­fla­tion sys­tem warns of wheel-end heat

New Zealand Truck & Driver - - Truck Shop -

AN ALERT THAT WARNS OF heat buildup in railer wheel ends is now stan­dard in the PSI au­to­matic tyre in­fla­tion sys­tem. PSI’s patented Ther­mALERT sys­tem helps avoid costly dam­age to the axle, sus­pen­sion and trailer – po­ten­tially even the loss of a trailer to fire – by alert­ing a driver to any ab­nor­mally high wheel-end tem­per­a­tures.

The PSI tyre in­fla­tion sys­tem is the only one that has the bear­ing tem­per­a­ture warn­ing sys­tem as part of its stan­dard pack­age, says Aaron Bur­son, sales en­gi­neer at TATES, the New Zealand dis­trib­u­tor for PSI.

The sys­tem works like a fire sprin­kler sys­tem head – with the core of a ther­mal screw in a frost plug in the wheel end de­signed to melt at 160 de­grees.

When that hap­pens, pres­surised air in the axle es­capes out through a hub cap vent sys­tem, trig­ger­ing a warn­ing light on the truck’s dash…

And emit­ting a sound at the vent that PSI says is “kind of like a ban­shee scream.”

The driver can thus find a safe place to pull over, check the axle and call for re­pairs be­fore any se­ri­ous dam­age oc­curs as a re­sult of the ab­nor­mal wheel-end op­er­at­ing tem­per­a­tures.

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