Guys,
In January I was transferred and went from a 2002 model truck to a 2008. Both had Detroit 60's, but the 08' has a cooled EGR valve. The 08' runs noticeably hotter than the 02'.
The manufacturer of the 08' did a few things I've not seen before. The engine cooling fan engages and remains engaged (no cycling) whenever;
The OEM on this truck used a lower quality heat exchanger for the transmission. It went bad before the warranty was up, and cost a pretty penny to repair.
I've also noticed that our newest two Pumpers have auxiliary heat exchangers mounted in the upper radiator hose/line, that are not valved at the pump panel. Whenever you engage the pump, they're cooling the engine before it even reaches the radiator. Doesn't seem like a bad idea to me, unless you're in a really cold climate.
What are some of the tricks of the trade (both designing, and on-scene use) that you guys use to ensure the truck and all it's components stay cool?
Do you think heated water from a heat exchanger should be routed back to the pump intake, or to the tank?
I've read where copper/nickle alloy is stronger and more corrosion resistant than copper alone. Do you specify a certain material for the heat exchangers?
In January I was transferred and went from a 2002 model truck to a 2008. Both had Detroit 60's, but the 08' has a cooled EGR valve. The 08' runs noticeably hotter than the 02'.
The manufacturer of the 08' did a few things I've not seen before. The engine cooling fan engages and remains engaged (no cycling) whenever;
- the midship transmission is in PUMP mode, or;
- the ECU receives a throttle command from the pump panel throttle.
The OEM on this truck used a lower quality heat exchanger for the transmission. It went bad before the warranty was up, and cost a pretty penny to repair.
I've also noticed that our newest two Pumpers have auxiliary heat exchangers mounted in the upper radiator hose/line, that are not valved at the pump panel. Whenever you engage the pump, they're cooling the engine before it even reaches the radiator. Doesn't seem like a bad idea to me, unless you're in a really cold climate.
What are some of the tricks of the trade (both designing, and on-scene use) that you guys use to ensure the truck and all it's components stay cool?
Do you think heated water from a heat exchanger should be routed back to the pump intake, or to the tank?
I've read where copper/nickle alloy is stronger and more corrosion resistant than copper alone. Do you specify a certain material for the heat exchangers?
Comment