Tag: Bus

HDX School Bus Heat Control Valve As time goes on as we all know technology changes and this is still true for controlling the heat flow on a Thomas HDX Pusher School Bus. In the old days the heat control was simply a cable attached to the valve which was a throttle plate plumbed into… Continue reading HDX School Bus Heater Control

Throttle Position Sensor Failure Last week one of our highway run Thomas HDX pushers called in with a “no throttle’ complaint. I sent one the mechanics out to investigate. He reported back saying that full throttle only gets up to 700 RPM. He hooked up the laptop and it came back with a TPS code… Continue reading School Bus Pusher TPS Code

Friday Afternoon School Bus Battery Voltage Problem It’s very common for our fleet to have a Friday afternoon service call….a real mystery why this happens and can’t be explained. Between 2:30 and 3:00 pm is the most common afternoon run starting time in our fleet and I got a call from one of the out… Continue reading School Bus Electrical Problem

Since this first occurrence there has been two more instances with the same bus model same year. The dealer will be replacing the radiator under warranty and the OEM representative has been notified. Out of three buses 2 of the radiators have been damaged requiring replacement. Spring Load And Fatigue The 2 bars that intersect… Continue reading A Peculiar School Bus Service Call

Thomas Bus Pusher ER Saf-T-Liner – Memories Of all the Thomas buses my favourite model is the saf-t-liner pusher. It was mainly hard wired and much easier to work on using raw troubleshooting especially when dealing with electrical problems. Over eighteen years ago when I started with the shop they were running 3208 Cat diesel… Continue reading The Thomas ER Saf-T-Liner School Bus

Take The Video Tour Of Our Garage Below I’ve added a video of a quick tour of the garage. The wash bay is the new home to our bulk oil tanks. They are replacing the originals due to age and size of them taking up room in the adjacent service bay. Watch the video for… Continue reading Today at the Bus Garage

An Example Of A Multiplex Wiring Schematic In the Video below I’m checking Out A Multi-Plex Wiring Circuit On A C2 School Bus. You will see the bulk head module (photo above). It sends and receives inputs and outputs and controls other modules communicating through the J1939 wrg. (You will find more details below) The… Continue reading Multiplexing On A School Bus