FalkePro Commercial Vehicle Parts Knowledge Base
Practical knowledge on truck, bus and commercial vehicle spare parts for parts distributors, workshops, fleets and transport companies in international markets.
Explore topics including parts identification, technical systems, quality, diagnostics, maintenance and spare parts sourcing.
Use the search function to find articles by component, term or topic.
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EGR coolers reduce the temperature of recirculated exhaust gas and support emission control in commercial vehicles. Learn how EGR cooling works, which symptoms can indicate a fault, and what matters when identifying replacement components.
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The diesel particulate filter is an important part of the exhaust aftertreatment system in modern commercial vehicles. Learn how DPF regeneration works, which faults can interrupt the process and what workshops should check during diagnostics.
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SCR systems use AdBlue dosing, NOx sensors and temperature monitoring to reduce nitrogen oxide emissions. Learn how the main components interact and why SCR faults require system-level diagnostics.
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Euro 5 and Euro 6 commercial vehicles can differ significantly in exhaust aftertreatment, sensors and system control. Learn what changed between the emission standards and why these differences matter for diagnostics and spare parts.
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Commercial vehicle parts can look identical or share the same mounting points without being interchangeable. Learn how mechanical, pneumatic, electrical and electronic differences can affect compatibility.
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Hybrid commercial vehicles combine combustion engines with electric motors, high-voltage batteries and power electronics. Learn how the main components interact and why voltage, cooling, control and vehicle configuration matter when selecting replacement parts.
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Electric axle systems combine electric drive components with the axle or transmission system. Learn how e-axles work, which components interact and what matters when diagnosing faults or selecting replacement parts.
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Pneumatic brake systems use fail-safe functions to maintain braking capability when air pressure is lost. Learn how spring brakes, protected circuits and pressure loss interact in commercial vehicles.
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Brake chambers can share similar dimensions while differing in stroke, force and mounting configuration. Learn which factors matter when replacing spring brake and service brake chambers in commercial vehicles.
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Brake pads and linings must provide stable friction under changing loads and temperatures. Learn what influences brake material performance, which wear patterns matter and why correct material quality is important in commercial vehicles.
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Parking brake systems in heavy commercial vehicles commonly use spring brake chambers that apply braking force mechanically when air pressure is released. Learn how the system works, how it differs from the service brake and what matters during diagnostics.
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Relay Valves in Commercial Vehicles: Function, Faults and Diagnostics
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The four-circuit protection valve distributes compressed air between separate pneumatic circuits and helps protect remaining circuits if pressure is lost. Learn how the valve works, why pressure specifications differ and what matters when selecting a replacement.
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Commercial vehicles use both disc and drum brakes depending on axle and application. Learn how the two systems work, which components they use and how their typical wear patterns differ.
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Electronic Braking Systems combine electronic control with pneumatic braking in modern commercial vehicles. Learn how EBS works, which components interact and what workshops should consider when diagnosing common faults.
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ABS modulators control brake pressure to prevent wheel lock during braking. Learn how they work, which faults can produce ABS warnings and why a modulator fault should be distinguished from sensor, wiring and pneumatic problems.
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Torque rods and bushings help control axle movement and maintain chassis geometry in commercial vehicles. Learn how wear develops, why correct dimensions matter and what to check when selecting replacement parts.
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Trailer EBS coordinates electronic braking between tractor and trailer using standardized communication interfaces. Learn how the system works, which components are involved and why EBS faults require more than simple ECU replacement.
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High-voltage battery packs in electric commercial vehicles combine cells, modules, thermal management and electronic control. Learn how these systems are structured and what workshops should consider when diagnosing battery faults.
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Correct wheel fastening depends on more than applying a torque value. Learn how clamping force, thread condition, tightening procedure and damaged studs or nuts affect wheel security in commercial vehicles.
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Slow air pressure build-up does not automatically mean that the compressor is defective. Learn how air leaks, the air dryer, pressure control and compressor performance can affect commercial vehicle pneumatic systems.
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Shock absorbers control suspension movement and help keep commercial vehicle tires in stable contact with the road. Learn how damping works, which signs can indicate wear and why correct specification matters.
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Height control valves regulate the ride height of air-suspended commercial vehicles. Learn how mechanical and electronic leveling systems work and what can cause uneven ride height or frequent air-system corrections.
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Steering knuckles, wheel hubs and bearings work together at the commercial vehicle wheel end. Learn how the components differ, which symptoms indicate wear and why similar-looking hub and bearing assemblies are not always interchangeable.
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Hydraulic and electrohydraulic steering systems provide steering assistance in different ways. Learn how both systems work, where their components differ and what workshops should consider when diagnosing steering problems.