A Parked Regen is a common term now since emissions went to the next reduction level mandated by the environmental protection agency in 2007. The emission controlled diesel engine is consuming used exhaust gases back into the intake that’s re-used for combustion. The gases are separated and redirected into the intake via the EGR (exhaust… Continue reading Cummins ISB Diesel Engine Parked Regen
The Cummins ISC diesel engine in this case a 1999 model quit suddenly on the main street just outside our shop. The driver was from out of town and we had to hold his bus for repairs. It had to be towed in and found the problem to be two engine codes. They were engine… Continue reading Cummins Diesel Engine Codes
Turbo Boost Performance Code Mercedes Diesel Engine The “turbo boost performance” code is the fussiest one of all with Mercedes MBE 900 diesel engines. It involves several different checks on the sensors, EGR, intake throttle among other basic checks. When I see an engine with this code I know it’s going to cost us a… Continue reading Mercedes Diesel Engine Turbo Code Repair
The Bad Ground Syndrome Have you ever experienced a problem with a light on a vehicle that shines very dim and seems to be illuminating another totally unassociated light? For example if you have the signal lights on and there are other lights flashing on and off as well you may have a bad ground.… Continue reading Mechanic Talk – Peculiar Problems In The Field
This is a brake job that has not gone well. It should have been a simple 2 to 3 hour job but everything has gone south as the saying goes. Every time we make a change with linings or machined brake drums the problem accelerates. We have replaced the linings 2 times and machined both… Continue reading Thomas School Bus Front Brake Replacement – Problems
The first diesel engine manufacturer I think of for emission changes in 2014 is Navistar who never went to an SCR system likes it’s counterpart at Cummins. The Navistar design just used the EGR to control the recirculated exhaust gases internally and in doing so had to pay for credits to the EPA to keep… Continue reading School Bus Emissions For 2014
This Week in The Garage The jobs that go on in our garage change day to day since we really don’t know what ‘s going to fail or what needs to be serviced next. There is always something to do around the shop. Of course I don’t have to tell any of the guys in… Continue reading Bus Garage Repairs This Week
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