The road test is the “last but not least” operation when making a repair on anything mechanical. Our mechanics are instructed to go on a road test after every job if the repair was a driveability issue. In this case I took this bus in the video for a good 1/2 hour run to reach… Continue reading Road Test Engine Code Repair DT MaxxForce Diesel Engine
If you ever thought of becoming a mechanic in the commercial transport industry you will never run out of work or experience as much variety as you will working on a school bus fleet. There’s never ending challenges with engines, electrical, air brakes and so on. Technology can be a pain in some areas where… Continue reading School Bus Garage Tour
There’s quite a back story behind this Cummins diesel engine repair. The Thomas HDX pusher was in Surrey on a sports run and everything was going well until the driver phoned me days earlier about an issue concerning the interior heating. The engine temperature was running at a normal level but no interior heat indicating… Continue reading Cummins ISC Diesel Engine Aftertreatment Code Repair
This particular school bus had to be towed in because it quit on the road an hour out of town. The diesel engine is a 2011 DT MaxxForce which uses high pressure oil to operate the electronic injectors controlled by the engine computer. The problem we found was loose injector hold downs with faulty sealing… Continue reading DT MaxxForce Diesel Engine Injector Sleeve Replacement
I’ve had a few highlights working on school buses over the last 22 years and this is one of them. The Proheat X30 diesel coolant heater manufactured in Vancouver, BC has proven itself all over North America. It’s programmed and engineered to deliver a clean burn and produce enough heat …a whopping 30,000 btu to… Continue reading Proheat X30 Diesel Coolant Heater Installed in an International School Bus
Deciding to replace a $3,000.00 turbocharger on a Mercedes MBE 900 isn’t an easy decision. This particular bus has been a thorn in our side for years mainly because of this one engine code that keeps popping up over and over again regardless of what we do to try and eliminate it. This time we… Continue reading Mercedes MBE 900 Turbo Replacement
The cylinder sleeves are the next step on this rebuild project. They have a rubber seal that goes around the outside to separate the coolant from the crankcase. Once lubricated each sleeve is forced into the block and counterbores. We purchased all of the necessary tools to carry out this job and cylinder sleeve hold… Continue reading DT MaxxForce Diesel Engine Cylinder Sleeve Protrusion
This EGR Valve fault code popped up and it caused a slight hesitation on acceleration which would make sense if the valve is open at the wrong time. The EGR funnels cooled exhaust coming from the EGR cooler into the intake system to cut down on emission levels. The code was 1896 EGR Valve Controller… Continue reading Cummins ISB Engine Code EGR Valve
This step involves replacing and torquing down the main bearings on a DT MaxxForce diesel engine. The main reason for replacing the bearings is to bring the crankshaft end play back to specs and replace the washed out original bearings. Some of them showed discoloration so we didn’t want to take a chance. The coolant… Continue reading Main Bearings DT Diesel Engine in a School Bus
Our In Frame has begun and #6 piston and liner has shown the damage caused by coolant contamination in the oil. If left too long the coolant will wash away the oil lubrication between the piston and piston liner. The terms for the piston cylinder for diesel engines that are able to be rebuilt in… Continue reading MaxxForce DT Removing Pistons and Liners
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