Low Oil Pressure Causes in Semi Trucks: Is It the Oil Pump?
Low oil pressure causes in semi trucks and bad oil pump symptoms: what to do when the warning comes on, how to verify with a gauge, and the check order.
Author: MPT Technical Team
How Air Brakes Work on Trucks and Trailers: Main Components
How air brakes work on trucks and trailers: the air path from compressor to brake chamber, circuits, trailer control, symptoms by part and maintenance.
Parts of a Semi Truck: Names and Functions by System
Parts of a semi truck by system: engine, fuel, cooling, brakes, suspension, cab, electrical and fifth wheel parts with their functions in one map.
What Is a Truck Retarder? How It Works and Common Faults
Truck retarder explained: how hydraulic and electromagnetic types work, correct use, retarder vs exhaust brake, fault symptoms and how to match parts.
Air Disc Brake Caliper: How It Works and Signs of Failure
Air disc brake caliper explained: how it works, why calipers stick, symptoms of failure, what to check at a pad change, and how to match the right part.
ABS Light On in a Semi Truck or Trailer: Causes and Checks
ABS light on semi truck? Causes of ABS or EBS warnings on trucks and trailers, a step-by-step check order and how to choose the right sensor and valve.
Clutch Master Cylinder Symptoms and Servo Faults in Trucks
Clutch master cylinder symptoms and clutch servo (slave cylinder) faults in trucks: symptom table, check order, repair kit decision and part selection.
Exhaust Manifold Leak Symptoms: Cracks and Gasket Failure
Exhaust manifold leak symptoms in trucks: what the manifold does, signs of cracks and gasket failure, causes, how to find the leak and how to choose parts.
How Often to Change Diesel Fuel Filters on a Truck
How often to change diesel fuel filters on a truck? What sets the interval, clogging symptoms, draining the water separator and bleeding the system.
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