Before starting with the school district 20 years ago all of the servicing I performed was on a floor creeper. Lying on my back sliding over a 35 foot span of a vehicle to do a visual and carry out maintenance and repairs was tedious at times. Having a vehicle hoist to work on a… Continue reading School Bus Servicing
This is yet another post on diesel engine emission codes which will never go away until all vehicles are hybrid electric drive. I think the fossil fuel manufacturers are very happy to supply billions of dollars worth of fuel to the world as long as they possibly can. For now all of the responsible people… Continue reading Diesel Engine Emission Codes
The video points out a couple of easy ways to get to the engine by removing the wheel and fender. This is a quick way to gain access to the exhaust manifold which had leaking gaskets. The vehicle inspection rules on a school bus states that any exhaust leaks have to be repaired before going… Continue reading MaxxForce 7 Diesel Engine Exhaust Leak
If you’re an apprentice mechanic I wouldn’t be surprised that you have a lot of decisions to make. Taking the plunge and getting into this trade has many options to think about. The mechanic label is stretched out to many other areas. Commercial transport, Heavy Duty and automotive mechanics are the big three and even… Continue reading Apprentice Mechanic Decisions
The Allison Automatic transmission module I’m talking about in the video is for a 2500 series model we’re running in all of our newer conventional buses. The older units have the 3000 series transmissions and we found that they were over and above what we needed for our fleet. Not only was it a cost… Continue reading Allison Automatic Transmission Module
Every time we do a service within our bus fleet it always goes on the hoist and is checked thoroughly front to back. The average time for a service varies with which interval we’re doing from a 5,000 to a 15,000 kilometer service. The hoist gives us a chance to check the wheels, bearings, brakes… Continue reading School Bus Steering Repair
School bus repairs in the garage are different every day. The mechanic has to be prepared to diagnose and repair problems in various categories like electrical, air brakes, steering, engines and emissions. I’ve seen problems happen in groups of three and within a tight time frame. This isn’t surprising since every group of buses purchased… Continue reading School Bus Repairs
There are times I don’t want to phone a dealer partsman and wait for them to take a serial number and look up a part. Having the Accessfreightliner website at your finger tips is a huge advantage to finding part numbers and technical information for all freightliner chassis vehicles. In our case it’s the C2 school… Continue reading Using Freightliner Parts Software
We’re looking at an EGR valve on a Mercedes MBE 900 diesel engine. It isn’t working properly as shown in the video using the Mercedes DDDL 7 diagnostic software to check it out. By pulling it off of the intake it’s easy to see the valve open and close. Commanding the EGR with the software… Continue reading EGR Valve Troubleshooting
This particular Mercedes diesel engine model is a 2008 and emission controlled. I can say for sure that any exhaust leaks on an emission controlled engine will create not only an engine code but also derated performance. Once the code shows it’s ugly icon on the dash nothing really feels different until over time it… Continue reading Mercedes Diesel Engine Exhaust Leak
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