The Cummins ISB diesel engine is a great piece of machinery and my first choice any day. It comes with the Allison 2500 series automatic transmission in our conventional buses and they work together extremely well. Those 2 components have given us minimal breakdowns. I shouldn’t say breakdowns more like minor inconveniences. The 250 horsepower… Continue reading Cummins ISB Diesel Engine
The Ricon wheel chair lift featured in the video is a very well designed piece of equipment. They use hydraulics to operate the lift cylinders that stow and unstow, lift and lower the lift deck. Micro switches limit the amount of travel during each action. There are interlocks that don’t allow the lift to operate… Continue reading Ricon Wheel Chair Lift
NOTE: So no one will think I was just dumping coolant on the floor and in to the city drain system and with respect to the EPA….The video showing the leak in question is draining water on to the floor. It’s not coolant since it was all lost (somewhere on a barren logging road) at… Continue reading Coolant Leak MaxxForce 7 Diesel Engine
The EGR cooler on this MBE 900 diesel engine developed a massive exhaust leak. The cause was the rear elbow at the cooler had worked it’s way out of the housing which caused the problem. This produced a lot of wear at the EGR cooler housing where the steel sealing rings sit. There’s not going… Continue reading Mercedes MBE EGR Cooler
This particular problem is on a 2009 Cummins ISC diesel engine. This model is an inline 6 8.3 Liter running in a Thomas HDX pusher school bus. The amber light presented itself on a field trip but did not cause any running problems mainly because it was an emission code. When the onboard computer does… Continue reading Cummins ISC Diesel Engine Code 1899
I’m a techie. I love new gadgets, and I appreciate the times we live in. From smart phones to smart TV’s, it’s hard to keep up with everything, but it’s never been so easy to entertain yourself and stay connected. On the topic of staying connected, I recently came across a new tool to keep… Continue reading Zus: Car Charger of the Future
CVSE (commercial vehicle safety and enforcement) officers have a serious job. They inspect commercial and fleet vehicles to government standards so there isn’t any junk driving up and down our highways. I’ve see a lot of mickey mouse repairs and scratch my head in disbelief. Why risk death to yourself or innocent people over a… Continue reading School Bus Inspection Manual
It’s true oil samples can find an issue way ahead of the obvious which means it’s usually too late to save an engine from catastrophic failure. If the driver comes to me with an engine noise complaint I always hope it’s a loose charge air clamp or fan belt. The difference between finding engine wear… Continue reading Oil Sample Reports Valuable
Continued preventative maintenance on diesel trucks, buses and heavy equipment extends the life of the vehicles while improving fuel economy. Diesel engines that undergo careful maintenance procedures can improve fuel efficiency up to 10% on the open road. Good continued maintenance will give trucks, buses and other equipment longer life spans and may also help them sustain their value in… Continue reading Preventative Maintenance Improves Fuel Economy and Truck Life
This Allison automatic transmission is a 2009 model in a Thomas school bus that was running around on it’s route when all of a sudden the transmission became stuck in first gear. Past experience with this condition told me that there was something wrong with either the output speed sensor, the connection or the wiring.… Continue reading Allison Auto Trans Stuck in First Gear
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