The coolant leak on the oil cooler was noticed during a service with the bus on the hoist. That’s what it’s all about when it comes to preventive maintenance. Finding problems before they get worse is our daily goal in the shop. Every 5,000 kilometres our buses go up on the hoist and gets a… Continue reading Cummins ISB Diesel Engine Oil Cooler
Cummins Diesel Engine Emission System For the past 3 years we have been buying International school buses CE models equipped with DT 466 Maxxforce and MaxxForce 7 engines. For 2014 International CE school buses will be coming with the Cummins ISB engines since IC can not meet emission standards. The big difference is the DEF… Continue reading Cummins 2010 Diesel Engine Emission System
The video below is one of the mechanics from the Kelowna school district giving us a tour of their natural gas infrastructure. They have 16 buses running on natural gas and so far they are happy with them. About Cummins Natural Gas Engines When we stopped in to the Kelowna school bus garage one… Continue reading Cummins ISL G Natural Gas Engine
Cummins ISC Fuel Transfer Pump The Cummins ISC Diesel Engine is the electronic version of the C mechanical model. The ISC uses a electronically controlled fuel transfer pump compared to the older mechanical version. There have been some failures in our fleet with the electronically controlled pump but not in epidemic proportions. In the video… Continue reading Cummins ISC Electric Fuel Pump
After the Cummins C series (Bosch fuel injection) diesel engines did their time in our fleet we were introduced to the ISC electronic model. A high pressure fuel accumulator supplied the injectors using a distributor pump. There were a few of these CAPS pumps that failed but that was over a long period of time.… Continue reading Cummins ISC Diesel Engine Repair
Checking Out an Intermittent Engine Exhaust Leak One of the 2009 Cummins ISB diesel engines we have in our fleet was experiencing an exhaust leak intermittently. The driver reported that when he was coming to a stop with the exhaust brake on he would be overtaken by exhaust fumes. Originally I went with him on… Continue reading Cummins ISB Diesel Engine Regen Using Insite Lite Software
Cummins ISB Head Gasket The Cummins 24 valve ISB in the video requires a new head gasket. This 2003 model year head gasket was leaking from the right front corner which is a common problem with these models. The head bolts have to be checked for stretch with a gauge that comes with the head… Continue reading School Bus Cummins ISB Head Gasket repair
I found out some interesting information about this code involving the fuel / water separator. The wiring for both the coolant sensor and fuel / water sensor namely the ground is shared. When the code for the water in fuel sensor popped up it also triggered an engine coolant temperature code to flash as well.… Continue reading Cummins ISB Engine Code Water In Fuel
I was out looking at one of our pusher buses and checking it out for running cold. The ambient temperature at the time was around -16 Celsius. In the video the first thing to check on these pusher buses is the hydraulic drive engine fan. The have stuck on in the past because of the… Continue reading Pusher School Bus Engine Running Cold – Cummins Diesel ISC Model
I found this animated video of the Cummins Diesel Aftertreatment system commonly known as SCR (Selective Catalytic Reduction). I need to get familiar with this system since we have been buying International buses since 2010. Navistar was only using the EGR to reduce emissions to 2010 standards along with buying credits so they did not… Continue reading Cummins Diesel Aftertreatment System Video
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