kscarbel2 Posted Sunday at 05:46 PM Share Posted Sunday at 05:46 PM 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/ Share on other sites More sharing options...
Bullheaded Posted Wednesday at 07:24 PM Share Posted Wednesday at 07:24 PM At the time, I applauded Cat for not giving in and selling us junk engines like every other emission motor is. But oddly enough, the SCR engines in the new Cat wheel loaders and excavators I'm operating work almost flawlessly. I don't get any of the codes. derates, failures that I CONSTANTLY had in my on road trucks. And they sit and idle for hours and hours every day. And they just run perfect and regen on their own with no drama. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/#findComment-590610 Share on other sites More sharing options...
mowerman Posted Thursday at 08:57 PM Share Posted Thursday at 08:57 PM Excellent yes I heard a long time ago. They didn’t want to mess with emissions. Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/#findComment-590664 Share on other sites More sharing options...
mrsmackpaul Posted 18 hours ago Share Posted 18 hours ago On 2/5/2026 at 6:24 AM, Bullheaded said: At the time, I applauded Cat for not giving in and selling us junk engines like every other emission motor is. But oddly enough, the SCR engines in the new Cat wheel loaders and excavators I'm operating work almost flawlessly. I don't get any of the codes. derates, failures that I CONSTANTLY had in my on road trucks. And they sit and idle for hours and hours every day. And they just run perfect and regen on their own with no drama. I wonder if earth moving machinery and farm machinery etc have different emission rules than trucks Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/#findComment-590741 Share on other sites More sharing options...
davehummell Posted 2 hours ago Share Posted 2 hours ago I like Macks and currently own a B model but the last place I worked there were two Kw's with c12 engines two Macks with 350's and Western star with a c12 a freightliner with a 400 DD an old Volvo with an old 350 Cummins another Mack yard tractor a Sterling with a c12 an Autocar with a Cummins two single axle garbage trucks with smaller cat engines a Ford rear load with a cat engine and a front load Mack with an mp8 this truck was the most unreliable in the fleet and one of the newest. A cat wheel loader with one of those English engines JD 410 backhoe and a JD 450 dozer and five walking floor trailers and brand-new Case frontend loader that was a nice machine to run. Every week there was something wrong with the pollution crap that was on the MP engine Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/#findComment-590781 Share on other sites More sharing options...
Geoff Weeks Posted 1 hour ago Share Posted 1 hour ago 16 hours ago, mrsmackpaul said: I wonder if earth moving machinery and farm machinery etc have different emission rules than trucks Paul They used to, IDK anymore. Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/#findComment-590787 Share on other sites More sharing options...
Joey Mack Posted 24 minutes ago Share Posted 24 minutes ago Not sure either, but I think machines under 40 HP do not require DEF... Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/#findComment-590790 Share on other sites More sharing options...
kscarbel2 Posted 2 minutes ago Author Share Posted 2 minutes ago 18 minutes ago, Joey Mack said: Not sure either, but I think machines under 40 HP do not require DEF... Utility tractors under 25 horsepower are exempt from Tier 4 emissions, so no DPF or DEF. Quote Link to comment https://www.bigmacktrucks.com/topic/76371-why-caterpillar-walked-away-from-new-highway-truck-engines/#findComment-590791 Share on other sites More sharing options...
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