Engine Overheating in Heavy-Duty Trucks: Causes & Fixes
Learn why heavy-duty truck engines overheat, how to read the gauge, step-by-step diagnosis, and how coolant, water pump, thermostat, and fan clutch fail.
Heavy-Duty Truck Technical Blog: Air Brakes, Compressors, Parts & Maintenance
Expert resources for heavy-duty professionals: technical guides on air brake systems, compressors, transmission and engine parts, failure symptoms, maintenance intervals and OE cross-reference charts.
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Brake Systems & ABS
ABS Brake System: How It Works, Warning Light and Faults
Learn how the ABS brake system works on heavy trucks, why the warning light comes on, how to diagnose sensor faults, and the correct replacement steps.
Recent Posts
Brake Caliper Mechanism: Camshaft, Bearings, and Return Spring
Inside the air disc brake caliper: how the camshaft, thrust bearings, return spring, and automatic adjuster convert push-rod force into pad pressure.
Brake Caliper Rubber Repair Kit: Failure & Replacement Guide
Brake caliper rubber repair kits explained: dust boots, o-rings, seals, pin bushings, failure signs, step-by-step replacement and the right grease to use.
Caliper Tappet & Dust Boot: Function, Failure, Replacement
Caliper tappet and dust boot explained: their job, what happens when the boot tears, why tappets seize, and how to inspect, measure and replace them correctly.
Brake Pad Wear Sensor: Function, Faults & Replacement Guide
Brake pad wear sensor: how the wire or electronic sensor triggers the warning lamp, common wiring faults, and how to measure and replace it correctly.
Tachograph Explained: Driver Cards, Symbols, Rest Times
Learn how a tachograph works: analog vs digital vs smart types, driver and company cards, display symbols, data download rules, and roadside inspection checks.
DPF (Diesel Particulate Filter) Guide: Symptoms & Cleaning
Learn what a DPF is, how passive and active regeneration work, warning signs of clogging, and safe cleaning methods for heavy commercial diesel trucks.
ADR Guide: Vehicle & Driver Rules for Dangerous Goods Transport
Learn what ADR means for heavy trucks: hazard classes, required vehicle equipment, driver certification, orange plate labeling, and inspection documents.
Power Steering Hydraulic Line Guide: Leaks & Replacement
Power steering hydraulic line guide: pressure, return, and suction line symptoms, fitting types, step-by-step replacement, and the bleeding procedure.
Fuel Water Separator Filter: Symptoms, Replacement & Care
Fuel water separator filter and housing guide: how it works, water level sensor, drain valve, heater, symptoms, replacement steps and bleeding, and maintenance.
Chassis Mounting Bracket: Crack, Loosening and Replacement Guide
How to spot cracks and loosening in a chassis mounting bracket, understand torque loss causes, and follow safe replacement and weld-repair limits.
Fan Belt Tensioner: Failure, Replacement & Maintenance
Learn what a fan belt tensioner does, why it squeals or vibrates, how to measure belt tension, and how to replace a worn tensioner pulley bearing.
Engine Oil Filter & Cap: Replacement and Maintenance Guide
Engine oil filter guide for heavy trucks: how it works, why the bypass valve opens, failure symptoms, and step-by-step replacement instructions.
Engine Piston, Liner & Ring Set: Failure and Replacement
Diagnose piston, liner and ring failures, measure protrusion and end gap correctly, and follow OE-based replacement and maintenance steps for heavy trucks.
Caliper Cover, Gasket & Plate: Faults, Replacement, Care
Learn how caliper cover, gasket and plate faults develop on air disc brakes, how to diagnose leaks, replace the group correctly and extend its life.
Caliper Carrier & Guide Pins: Faults, Replacement, Care
Learn how caliper carrier and guide pin wear causes uneven pad wear, how to test slide freedom, replace the kit step by step and grease it correctly.
Caliper Pad Retainer & Pad Plate: Faults, Replacement, Care
How the caliper pad retainer and pad plate work, the symptoms of a fatigued spring, correct replacement steps and the checks that keep wear even.
Intake Manifold and Intake Pipe: Faults, Diagnosis, Repair
Learn how the intake manifold and charge air pipe work, how to spot boost leaks, run a pressure test, fit them correctly and keep them leak free.
Rocker Arm & Shaft Set: Faults, Replacement and Maintenance
Learn how a heavy truck rocker arm and shaft set works, how to spot bushing wear, measure valve clearance and replace the assembly step by step.
Caliper Guide Pin, Bushing & Bolt: Faults, Repair, Care
Learn how caliper guide pins and bushings seize, how to diagnose uneven pad wear, and the correct removal, greasing and torque steps for replacement.
Clutched Air Brake Compressor: Faults, Replacement, Care
Learn how the clutch works, tell a slipping clutch from a worn compressor, follow the replacement steps and read the reference torque and pressure values.
Solenoid Coil: Faults, Testing, Replacement and Maintenance
Understand how a solenoid coil works, spot open or shorted windings with a multimeter, replace it correctly and extend its service life on trucks.
Transmission PTO: Faults, Replacement and Maintenance Guide
A workshop guide to truck transmission PTO units: how they work, why they fail to engage, correct backlash setting on fitting and habits that extend life.
