Thomas school buses along with Freightliner highway trucks have multiplexing software built in to reduce wiring and connections. It’s similar to optic cable where messages are flying back and forth at high speed. To make all of this work there are several modules that interconnect with J1939 to relay inputs and outputs. if the operator… Continue reading Thomas School Bus Diagnostic Link 8 Software
There are 2 valuable tools that come to mind when working on your typical diesel engine … engine diagnostic software and your brain. There are so many areas that need to be checked when the engine will not start. Checking the source is the number one step to carry out. This means checking the fuel… Continue reading DT MaxxForce Diesel Engine Will Not Run
It doesn’t matter who you talk to preventing problems is natural. Prevention is a big word when it comes to anything mechanical that runs on wheels. This 2007 Thomas rear engine pusher school bus is going through several repairs. The diesel particulate filter needs cleaning because of an engine code which indicated that there was… Continue reading Thomas Pusher Mercedes MBE 900 Emission Maintenance
It’s a glorious time to run a diesel engine after the rebuild is completed. it’s bitter sweet because of the money spent and knowing that eventually there will be the same problems down the road that originally caused the engine to wear out in the first place. Thousands of dollars and numerous hours of labor… Continue reading DT MaxxForce Rebuild Running Check
This running test for injection control pressure (ICP) is a good test to run since these specs determine the fuel injection operation. This is the DT MaxxForce which requires 870 psi of ICP to run while the maximum can go as high as 4500 psi. These high pressures create problems if there is a leak… Continue reading MaxxForce Diesel Injection Control Pressure
The window on a car is more important than you may think. In fact you’re only likely to realize how important it is when it malfunctions. After all how do you cope with the drive through or taking a ticket at the parking lot? Even something as simple as getting fresh air into your vehicle… Continue reading Causes of Power Window Malfunctions
If you are thinking that the life of a truck driver seems like it’s a good one, you should know that there are pros and cons, just like in every other job. It’s certainly true that most truck drivers love what they do, and they enjoy the camaraderie that they have with other drivers. However,… Continue reading Five Facts About Being A Truck Driver That You May Not Know
The video proves how lame the factory electric air horn sounds. I was shocked when I first heard it. It would be the perfect device for an Austin Mini perhaps but not a 40 foot school bus. There are other buses that we have installed regular high and low tone electric horns to get that… Continue reading IC School Bus Air Horn Installation
Now you can see my cubicle where I run the fleet with various resources. Drivers will walk by and verbally inform me with defects on their bus which they also report using their pre-trip and post trip paperwork. We rely heavily on the drivers to report any problems to the shop to keep defects from… Continue reading School Bus Mechanic Daily Routine
It’s hard to believe that the MaxxForce 7 diesel engine regenerating in this video is manufactured by Navistar. Constant issues with these engines have cost us down time and expense over poorly designed components. I know everybody involved with the manufacturing of these models feels bad for the customers out there who are dealing with… Continue reading MaxxForce 7 Diesel Engine Forced Regen
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