A
Air Brake System
An air brake system is a type of braking system used on heavy-duty trucks that relies on compressed air to apply pressure to the brakes. It provides more stopping power for large vehicles compared to traditional hydraulic brakes and is essential for safe operation of commercial trucks.
Air Compressor
An air compressor is a device on a truck that generates compressed air to power the air brake system and other pneumatic components. Without it, brakes and air-powered tools would not function properly.
Air Dryer
An air dryer removes moisture and contaminants from the compressed air in the braking system. This prevents rust, corrosion, and frozen lines, which is especially important in cold Alberta winters.
Air Suspension
Air suspension replaces traditional metal springs with air-filled bags to support the truck’s weight. It provides a smoother ride, reduces wear on suspension components, and helps protect the cargo.
Aftertreatment System
The aftertreatment system reduces harmful diesel emissions using components like diesel particulate filters (DPF), selective catalytic reduction (SCR), and DEF dosing. It ensures trucks meet environmental regulations while maintaining engine performance.
Axle Housing
The axle housing is the protective casing that surrounds the axle shafts and differential. It supports the vehicle’s weight and protects the drivetrain components from dirt, debris, and damage.
Axle Shaft
An axle shaft transmits engine power from the differential to the truck’s wheels. It is a critical part of the driveline that allows the vehicle to move efficiently.
Axle Alignment
Axle alignment ensures that the wheels of a truck are properly positioned. Correct alignment improves tire lifespan, fuel efficiency, and vehicle handling, while misalignment can lead to uneven tire wear and unsafe driving conditions.
Automatic Regeneration
Automatic regeneration is the process by which a diesel particulate filter (DPF) burns off accumulated soot while the truck is running. This keeps the engine running efficiently and prevents emissions problems without manual intervention.
Alternator System
The alternator system converts mechanical energy from the engine into electrical power to charge the truck battery and run electrical components. It is essential for keeping lights, electronics, and starting systems operational.
B
Brake Chamber
A brake chamber converts compressed air into mechanical force to apply the brakes. It is a key component of the air brake system that ensures the truck can stop safely.
Brake Drum
A brake drum is a rotating part in drum brakes that the brake shoes press against to slow or stop the vehicle. It is commonly found on heavy-duty truck axles.
Brake Pad
A brake pad is the friction material in disc brakes that presses against the rotor to slow the truck. Worn brake pads can reduce braking efficiency and should be replaced regularly.
Brake Slack Adjuster
A brake slack adjuster helps maintain the proper distance between brake shoes and the drum in air brake systems. This ensures the brakes engage evenly and consistently.
Brake System
The brake system includes all the components, such as chambers, pads, drums, and air lines, that allow a truck to stop safely. Regular maintenance is crucial for reliable braking performance.
Brake Air Leak
A brake air leak occurs when compressed air escapes from the brake system, which can lead to reduced braking power or complete brake failure. Detecting and fixing leaks promptly is critical for safety.
Brake Fade
Brake fade happens when brakes lose their effectiveness due to overheating, often caused by heavy loads or prolonged braking. It can be dangerous if not addressed promptly.
Brake Adjustment
Brake adjustment is the process of setting the correct spacing between brake components so they operate effectively. Proper adjustment ensures safe braking and compliance with regulations.
Battery Charging System
The battery charging system keeps the truck battery charged and powers electrical components using the alternator and voltage regulator. Without it, the truck’s electronics and engine starting system could fail.
Belt Tensioner
A belt tensioner keeps engine belts, like the serpentine belt, tight so that accessories such as the alternator, water pump, and air compressor operate correctly. Loose belts can cause engine problems or accessory failure.
Blowby (Engine Blow-by)
Blowby occurs when combustion gases leak past the piston rings into the crankcase. This is a sign of engine wear and can reduce efficiency while contaminating engine oil.
Boost Pressure
Boost pressure is the extra air pressure created by a turbocharger to force more air into the engine cylinders. Higher boost improves engine power and efficiency but must be monitored to prevent damage.
C
Coolant System
The coolant system circulates antifreeze and water through the engine to maintain the correct operating temperature. It prevents overheating in summer and freezing in winter while protecting engine components from corrosion.
Coolant Flush
A coolant flush is a maintenance procedure where old coolant is drained and replaced with fresh antifreeze. This helps remove rust, scale, and contaminants, keeping the engine running efficiently.
Cylinder Head
The cylinder head sits on top of the engine block and houses components like valves, spark plugs, and fuel injectors. It seals the combustion chamber and helps regulate airflow and cooling.
Crankshaft
The crankshaft converts the up-and-down motion of pistons into rotational motion that powers the truck’s drivetrain. It is a central component of the engine that must be precisely balanced.
Camshaft
The camshaft controls the opening and closing of engine valves, ensuring proper timing for air intake and exhaust. In diesel engines, it is critical for fuel efficiency and performance.
Clutch Assembly
The clutch assembly connects and disconnects the engine from the transmission, allowing smooth gear changes in manual trucks. A worn clutch can cause slipping or difficulty shifting.
Clutch Plate
The clutch plate is the friction surface within the clutch assembly that engages the engine to the transmission. Replacing worn plates is necessary to maintain proper power transfer.
Clutch Slippage
Clutch slippage happens when the clutch plate fails to fully engage, causing the engine to rev without moving the truck effectively. This can indicate wear or improper adjustment.
Compression Ratio
Compression ratio is the ratio of the volume of the engine cylinder when the piston is at the bottom of its stroke versus the top. Higher compression improves engine efficiency but requires strong components to handle the pressure.
CVIP Inspection
A CVIP inspection (Commercial Vehicle Inspection Program) is a mandatory safety check for commercial trucks in Alberta. It verifies that brakes, lights, tires, and other critical systems meet government safety standards.
Cooling Fan Clutch
The cooling fan clutch engages and disengages the engine cooling fan based on temperature. This helps the engine stay at an optimal temperature while improving fuel efficiency.
Charge Air Cooler
A charge air cooler (intercooler) cools the compressed air from the turbocharger before it enters the engine. Cooler air increases engine efficiency and power while reducing the risk of knocking.
Combustion Chamber
The combustion chamber is the space inside the cylinder where fuel is burned to produce power. Its design affects efficiency, emissions, and engine performance.
Commercial Vehicle Inspection
A commercial vehicle inspection is a detailed check of a truck’s safety and operational components. It ensures compliance with regulations and helps prevent breakdowns or accidents.
Control Module
A control module is an electronic device that monitors and manages specific truck systems, such as engine performance, transmission shifts, or emission controls.
D
Diesel Engine
A diesel engine uses compression to ignite fuel instead of a spark, producing high torque and fuel efficiency. It is commonly used in heavy-duty trucks for hauling and long-distance operation.
Diesel Combustion
Diesel combustion is the process where diesel fuel ignites in the engine’s combustion chamber under high pressure. Proper combustion is essential for power, efficiency, and emission control.
Diesel Fuel Injector
A diesel fuel injector sprays precise amounts of fuel into the combustion chamber. Malfunctioning injectors can cause rough running, loss of power, or increased emissions.
Diesel Exhaust Fluid (DEF)
DEF is a liquid solution injected into the exhaust to reduce nitrogen oxide emissions in modern diesel engines. It works with the SCR system to meet environmental standards.
Diesel Exhaust System
The diesel exhaust system carries combustion gases from the engine and reduces harmful emissions. It includes the DPF, catalytic converters, mufflers, and exhaust pipes.
Diesel Particulate Filter (DPF)
A DPF captures soot and particulate matter from diesel exhaust. Periodic regeneration burns off the collected particles to maintain engine efficiency and comply with emissions regulations.
Differential
The differential allows the drive wheels to rotate at different speeds while turning, improving stability and reducing tire wear. It is housed within the axle assembly.
Differential Lock
A differential lock forces both wheels on an axle to rotate at the same speed, improving traction in slippery or off-road conditions.
Diagnostic Trouble Code (DTC)
A DTC is an error code generated by a truck’s electronic control module to indicate engine, transmission, or emission system issues. Mechanics use DTCs to diagnose and fix problems.
Driveline
The driveline transmits power from the engine and transmission to the drive wheels. It includes the driveshaft, U-joints, and differential components.
Driveshaft
The driveshaft is a rotating shaft that connects the transmission to the differential, transferring torque to the wheels. Proper maintenance prevents vibration and failure.
Diesel Engine Overhaul
A diesel engine overhaul is a complete rebuilding of the engine, including replacement or machining of worn components. It restores engine performance and extends its lifespan.
Diesel Engine Diagnostics
Diesel engine diagnostics is the process of identifying engine problems using specialized tools, sensors, and error codes. Accurate diagnostics prevent costly repairs and downtime.
Diesel Engine Rebuild
A diesel engine rebuild involves repairing or replacing major engine components to restore it to like-new condition. It is often more cost-effective than a full engine replacement.
Diesel Engine Cooling System
The diesel engine cooling system circulates coolant through the engine and radiator to prevent overheating. It protects engine components and ensures consistent performance.
Diesel Repair Shop
A diesel repair shop specializes in servicing, repairing, and maintaining diesel engines and heavy-duty trucks. Technicians handle mechanical, electrical, and diagnostic issues.
Diesel Engine Repair
Diesel engine repair covers fixing specific engine issues, such as injector problems, turbocharger faults, or cylinder damage, to restore performance.
Driveline Vibration
Driveline vibration occurs when components like the driveshaft, U-joints, or differential are misaligned or worn. It can cause noise, discomfort, and further mechanical damage.
Diesel Turbo Failure
Diesel turbo failure occurs when the turbocharger stops providing proper boost due to worn bearings, damaged blades, or oil starvation. Symptoms include loss of power, smoke, and unusual noises.
E
EGR System
The EGR (Exhaust Gas Recirculation) system recirculates a portion of exhaust gases back into the engine to reduce nitrogen oxide emissions. It is a key component of modern emission control systems.
EGR Valve
The EGR valve regulates the flow of exhaust gases into the intake manifold. A clogged or faulty valve can cause rough idling, reduced fuel efficiency, and increased emissions.
ECM (Engine Control Module)
The ECM is the electronic brain of the engine, controlling fuel injection, timing, and emission systems. It monitors sensors and adjusts engine performance for efficiency and compliance.
ECM Tuning
ECM tuning modifies the engine control module’s settings to improve fuel efficiency, power output, or emission performance. It must be done carefully to avoid engine damage.
Exhaust System
The exhaust system carries engine gases out of the truck while reducing noise and harmful emissions. It includes components like pipes, mufflers, and catalytic converters.
Exhaust Manifold
The exhaust manifold collects exhaust gases from the engine cylinders and directs them into the exhaust system. Cracks or leaks can reduce performance and increase emissions.
Exhaust Gas Temperature Sensor
This sensor measures the temperature of exhaust gases to help manage emissions and protect components like the DPF and turbocharger.
Engine Block
The engine block is the main structure of the engine, housing cylinders, pistons, and other key components. It forms the foundation for the entire engine assembly.
Engine Bearings
Engine bearings support rotating components like the crankshaft and camshaft, reducing friction and wear. Worn bearings can lead to engine failure.
Engine Oil Analysis
Engine oil analysis tests oil for contaminants, wear metals, and chemical properties. It helps predict engine problems before they become serious.
Engine Cooling System
The engine cooling system circulates coolant to prevent overheating. It includes the radiator, water pump, hoses, and fans to maintain stable engine temperatures.
Engine Overhaul
An engine overhaul is a comprehensive rebuild of the engine, including replacement of worn parts, machining of components, and restoring full engine performance.
F
Fleet Maintenance
Fleet maintenance involves the regular servicing, inspection, and repair of a group of commercial vehicles. Keeping fleet trucks in good condition reduces breakdowns, improves safety, and extends vehicle life.
Fleet Diagnostics
Fleet diagnostics is the process of using specialized tools and software to monitor multiple trucks for engine, transmission, or electrical issues. This helps fleet managers schedule repairs proactively and prevent costly downtime.
Fuel Injection System
The fuel injection system delivers precise amounts of diesel fuel into the engine’s combustion chambers. Proper functioning is critical for engine performance, efficiency, and emissions control.
Fuel Pump
The fuel pump moves diesel from the tank to the engine at the correct pressure. A failing pump can cause starting problems, misfires, or power loss.
Fuel Contamination
Fuel contamination occurs when dirt, water, or debris enters the diesel fuel system. Contaminated fuel can damage injectors, pumps, and engines if not filtered or treated.
Fuel Filter
A fuel filter removes impurities from diesel before it reaches the engine. Replacing clogged filters helps maintain engine performance and prevents damage.
Fuel Rail Pressure
Fuel rail pressure is the force of diesel in the fuel rail supplying injectors. Maintaining proper pressure ensures smooth engine operation and prevents misfires.
Fuel System Leak
A fuel system leak is any unintended escape of diesel from tanks, lines, or injectors. Leaks reduce efficiency, increase fire risk, and should be repaired immediately.
Frozen Truck Brakes
Frozen truck brakes occur when moisture in air lines or brake components freezes in cold weather. This can prevent proper braking and requires thawing or repair.
Frame Damage
Frame damage refers to bends, cracks, or stress on the truck chassis. Damaged frames compromise safety and vehicle stability, requiring professional repair.
G
Glad Hands
Gladhands are connectors used on trucks and trailers to attach air brake lines. They allow compressed air to flow between vehicles safely and quickly.
Gear Ratio
Gear ratio is the ratio between the rotations of two gears in the drivetrain. It affects acceleration, torque, and fuel efficiency.
Gearbox
The gearbox, or transmission, changes the engine’s output to control vehicle speed and torque. Proper maintenance ensures smooth shifting and long life.
Gasket Failure
Gasket failure happens when seals between engine or transmission components leak fluids or gases. This can lead to overheating, loss of pressure, or engine damage.
Glow Plug
A glow plug is a heating device used in diesel engines to help ignite fuel in cold conditions. Malfunctioning glow plugs can cause hard starts and rough idling.
Ground Wire
A ground wire completes the electrical circuit by connecting components to the truck chassis or battery negative terminal. Poor grounding can cause electrical faults or sensor errors.
Governor Pressure
Governor pressure controls engine speed and power output in diesel engines. Incorrect pressure can affect acceleration, fuel efficiency, and performance.
Grease Fittings
Grease fittings are small ports on mechanical parts where lubricants are applied. Regular greasing keeps moving components like U-joints and suspension parts operating smoothly.
H
Heavy Duty Truck Repair
Heavy duty truck repair covers the maintenance and fixing of large commercial trucks. Services include engine work, brake repair, suspension, drivetrain, and electrical troubleshooting.
Heavy Duty Trailer Repair
Heavy duty trailer repair involves fixing structural, braking, suspension, or electrical systems on commercial trailers. Regular maintenance ensures safety and prevents costly downtime.
Hydraulic Clutch
A hydraulic clutch uses fluid pressure instead of a cable to engage and disengage the transmission. It allows smoother shifting and requires less pedal effort.
Hub Bearing
The hub bearing supports the wheel and allows it to rotate freely while carrying the vehicle’s load. Worn bearings can cause noise, vibration, or wheel failure.
Hub Assembly
The hub assembly houses the wheel bearing and provides the mounting point for the wheel. Proper maintenance ensures smooth wheel rotation and safety.
Heater Core
The heater core is a small radiator inside the cab that provides heat from the engine’s coolant. A leaking or blocked heater core can cause poor cabin heating or coolant loss.
High Pressure Fuel Pump
A high pressure fuel pump delivers diesel to the engine injectors at precise pressure. It is essential for proper combustion and engine performance.
Horsepower Rating
Horsepower rating measures the engine’s power output. Higher ratings indicate more towing capability, acceleration, and overall performance.
I
Idle Control System
The idle control system regulates engine speed when the truck is not moving. It maintains smooth operation and prevents stalling.
Injector Pump
The injector pump delivers fuel to the engine injectors at the required timing and pressure. A faulty pump can cause misfires, rough running, or starting issues.
Intake Manifold
The intake manifold distributes air evenly to each cylinder for combustion. Proper airflow improves engine efficiency and reduces emissions.
Intercooler
An intercooler cools the air compressed by a turbocharger before it enters the engine. Cooler air improves combustion efficiency and power output.
Ignition Delay (Diesel Combustion)
Ignition delay is the time between fuel injection and combustion in a diesel engine. Excessive delay can cause knocking, reduced efficiency, and increased emissions.
Injection Timing
Injection timing refers to the exact moment diesel is injected into the combustion chamber. Proper timing ensures efficient combustion, power, and low emissions.
J
Jake Brake
A Jake Brake is an engine braking system that slows a truck by releasing compressed air from the cylinders. It helps reduce wear on service brakes, especially on long descents.
Journal Bearing
A journal bearing supports rotating engine or driveline components and reduces friction. Worn bearings can cause vibration, heat buildup, or component failure.
Jounce Bumper
A jounce bumper is a suspension component that cushions the truck when the suspension fully compresses. It prevents metal-on-metal contact and protects the frame.
Junction Box (Electrical)
A junction box houses and organizes electrical connections. It protects wires from damage and makes troubleshooting or repairs easier.
K
Kingpin
The kingpin is a heavy-duty pin that connects the trailer to the truck’s fifth wheel. It allows the trailer to pivot safely during turns.
Kingpin Bushing
The kingpin bushing supports the kingpin within the fifth wheel. It reduces wear and ensures smooth pivoting of the trailer.
Knock Sensor
A knock sensor detects abnormal engine vibrations caused by pre-ignition or detonation. It helps the ECM adjust timing and prevent engine damage.
Key Switch (Ignition System)
The key switch starts the truck’s electrical system and engine. It controls power to accessories and ignition circuits.
L
Leaf Spring
Leaf springs are stacked metal strips that support the truck’s weight and absorb road shocks. They are a common suspension component on heavy-duty trucks.
Lift Axle
A lift axle is an additional axle that can be raised or lowered to support varying loads. Raising the axle reduces tire wear when the truck is lightly loaded.
Lubrication System
The lubrication system circulates oil to moving engine parts to reduce friction and wear. Proper maintenance ensures longevity of engine components.
Liner Wear
Liner wear refers to the erosion or damage inside the cylinder liners where pistons move. Excessive wear reduces compression and engine performance.
Load Distribution
Load distribution ensures the truck’s weight is balanced across axles. Proper distribution improves handling, tire life, and safety.
Low Air Pressure Warning
A low air pressure warning alerts the driver when the truck’s air brake system drops below safe levels. Immediate attention is required to prevent brake failure.
M
Mobile Truck Repair
Mobile truck repair brings qualified mechanics and tools directly to the truck’s location for roadside or on-site service. It reduces downtime and avoids costly towing.
Mobile Heavy Duty Mechanic
A mobile heavy duty mechanic is a professional who travels to trucks for repairs and maintenance. They handle engine issues, brake repairs, electrical faults, and more.
Mobile Service Truck
A mobile service truck is a fully equipped vehicle that carries tools, spare parts, and diagnostic equipment to perform on-site repairs.
Mobile Welding
Mobile welding allows repairs of metal components, frames, or trailers on-site without moving the truck to a shop. It is especially useful for emergencies.
Mechanical Fuel Pump
A mechanical fuel pump moves fuel from the tank to the engine using a mechanically driven lever. Proper operation is essential for steady engine performance.
Maintenance Schedule
A maintenance schedule outlines regular servicing intervals for oil changes, inspections, and component replacements. Following it helps prevent breakdowns and extend vehicle life.
Misfire (Diesel Engine)
A misfire occurs when a cylinder fails to ignite properly. Causes can include faulty injectors, compression loss, or timing issues.
Master Cylinder
The master cylinder converts pedal force into hydraulic pressure for the brake system. It is critical for proper brake operation.
Metal Fatigue
Metal fatigue is the weakening of structural components due to repeated stress and load cycles. It can lead to cracks or failure if not monitored.
Muffler System
The muffler system reduces engine noise and directs exhaust gases safely away from the truck. It also plays a minor role in emission control.
N
Nitrogen Oxides (NOx)
Nitrogen oxides are harmful gases produced during diesel combustion. Modern trucks use emission control systems like SCR and EGR to reduce NOx and meet environmental regulations.
Neutral Safety Switch
The neutral safety switch prevents the truck from starting unless the transmission is in neutral or park. This safety feature helps avoid accidental movement during startup.
No-Start Condition
A no-start condition occurs when the engine fails to start despite turning the ignition. Causes can include battery issues, faulty starter, fuel problems, or engine malfunctions.
Noise Vibration Harshness (NVH)
NVH refers to unwanted noise, vibration, and harshness experienced in the truck. It can result from engine, suspension, or drivetrain issues and affects driver comfort.
O
Oil Change
An oil change is the process of draining old engine oil and replacing it with fresh oil. Regular oil changes keep the engine lubricated, reduce wear, and improve performance.
Oil Filter
The oil filter removes contaminants from engine oil to prevent damage to internal engine components. Replacing the filter regularly ensures clean oil circulation.
Oil Pressure Sensor
The oil pressure sensor monitors engine oil pressure and sends data to the dashboard or ECM. Low oil pressure warnings can indicate leaks or failing pumps.
Oil Pump
The oil pump circulates engine oil through bearings, camshafts, and other components. Proper pump operation is critical for lubrication and engine longevity.
Overheating Engine
An overheating engine occurs when the cooling system fails to regulate temperature. Causes include low coolant, radiator issues, or thermostat failure. Immediate attention is required to prevent engine damage.
Oxygen Sensor
An oxygen sensor measures the oxygen content in exhaust gases. It helps the ECM adjust fuel injection for optimal combustion and lower emissions.
Overdrive Transmission
Overdrive is a gear in the transmission that allows the truck to cruise at lower engine RPM for improved fuel efficiency and reduced engine wear.
Oil Contamination
Oil contamination occurs when dirt, water, or metal particles enter engine oil. Contaminated oil reduces lubrication, accelerates wear, and may cause engine damage.
P
Piston Rings
Piston rings seal the gap between the piston and cylinder wall, controlling oil consumption and maintaining compression. Worn rings can reduce engine power and increase oil use.
Piston Cylinder
The piston cylinder houses the piston and guides its movement during combustion. Proper maintenance ensures smooth operation and prevents engine wear.
Preventive Maintenance
Preventive maintenance is routine servicing performed to prevent breakdowns and extend vehicle life. It includes inspections, oil changes, and component replacements.
Preventive Maintenance Schedule
A preventive maintenance schedule outlines when to perform routine checks and services. Following it reduces downtime and costly repairs.
Powertrain
The powertrain includes the engine, transmission, driveshaft, and axles that deliver power to the wheels. Proper maintenance ensures smooth performance and longevity.
PTO (Power Take-Off)
A PTO transfers engine power to auxiliary equipment such as pumps or hydraulic systems. It is commonly used in construction or service trucks.
Pressure Regulator Valve
A pressure regulator valve controls fluid or air pressure within a system, ensuring safe and consistent operation. Malfunction can cause performance issues.
Pump Timing
Pump timing refers to the synchronization of fuel or hydraulic pumps with engine cycles. Correct timing ensures efficient operation and prevents damage.
Particulate Matter
Particulate matter consists of tiny soot particles emitted from diesel engines. DPF systems capture these particles to reduce pollution.
Power Steering Pump
The power steering pump provides hydraulic pressure to assist steering. A failing pump can make steering heavy and difficult, especially at low speeds.
Q
Quick Release Valve
A quick release valve allows rapid venting of air pressure in the brake system to improve responsiveness.
Quality Control Inspection
Quality control inspection ensures repairs, maintenance, or manufacturing meet safety and performance standards.
Quill Shaft
A quill shaft transmits torque in transmissions or drivelines while allowing for slight misalignment. It helps reduce vibration and stress on components.
R
Regeneration Cycle
A regeneration cycle burns off soot collected in the DPF to maintain engine efficiency and reduce emissions.
Radiator System
The radiator system cools engine coolant and prevents overheating. It includes the radiator, hoses, fan, and thermostat.
Retarder Brake
A retarder brake slows the truck using engine or driveline resistance instead of wheel brakes, reducing wear and improving control on descents.
Rocker Arm
The rocker arm transfers motion from the camshaft to the valves, allowing them to open and close for combustion.
Rod Bearing
Rod bearings support the connecting rods and crankshaft, reducing friction during piston movement. Worn bearings can cause engine knocking.
Repair Diagnostics
Repair diagnostics involve analyzing symptoms and error codes to identify truck problems. Accurate diagnostics prevents unnecessary repairs.
Roadside Breakdown
A roadside breakdown occurs when a truck fails while on the road. Mobile repair services can often fix these issues quickly to minimize downtime.
Refrigerant System
The refrigerant system cools the truck cab and HVAC components. Leaks or failures reduce air conditioning performance.
S
Suspension System
The suspension system supports the truck’s weight, absorbs shocks, and keeps tires in contact with the road. Proper maintenance ensures ride comfort and safety.
Suspension Air Bags
Air bags in the suspension replace or supplement springs to provide a smoother ride and better load handling.
Steering Linkage
The steering linkage connects the steering wheel to the wheels, translating driver input into movement. Worn components can cause play or misalignment.
Steering Gearbox
The steering gearbox converts rotational motion from the steering wheel into linear motion for the wheels. Proper function ensures precise control.
Shock Absorber
Shock absorbers dampen the motion of springs, reducing bouncing and improving ride stability and handling.
Starter Motor
The starter motor spins the engine to initiate combustion. A faulty starter prevents the truck from starting.
SCR System
Selective Catalytic Reduction (SCR) injects DEF into the exhaust to reduce nitrogen oxide emissions in diesel engines.
Sensor Calibration
Sensor calibration ensures that engine, brake, and transmission sensors provide accurate readings for optimal performance.
Service Interval
Service intervals define how often maintenance tasks like oil changes or inspections should be performed to keep trucks safe and reliable.
Speed Sensor
A speed sensor monitors wheel or driveshaft speed for the ECM, ABS, and transmission systems. Faulty sensors can affect performance and safety systems.
Slack Adjuster
A slack adjuster maintains proper brake shoe-to-drum clearance in air brake systems. Proper adjustment ensures consistent braking.
Seal Failure
Seal failure occurs when gaskets or O-rings leak fluids or air, leading to reduced system performance or component damage.
Steering Instability
Steering instability refers to wandering, pulling, or vibrations in the steering. Causes can include alignment issues, worn suspension, or tire problems.
Suspension Alignment
Suspension alignment ensures all wheels are properly positioned relative to each other. Correct alignment reduces tire wear and improves handling.
System Diagnostics
System diagnostics involve using electronic tools to read fault codes and assess truck systems like engine, brakes, and transmission.
T
Turbocharger
A turbocharger uses exhaust gases to spin a turbine that compresses air entering the engine. This increases power and efficiency without increasing engine size.
Turbo Lag
Turbo lag is the delay between pressing the accelerator and feeling the engine respond due to the time needed for the turbo to spool. Proper tuning can reduce lag.
Turbo Boost Pressure
Turbo boost pressure measures the extra air pressure delivered by the turbocharger to the engine. Correct boost improves power, fuel efficiency, and combustion.
Transmission System
The transmission system transfers engine power to the wheels and allows speed and torque adjustment. Maintaining the transmission ensures smooth operation and longevity.
Transmission Fluid
Transmission fluid lubricates gears and bearings, cools components, and transmits hydraulic pressure. Regular checks prevent slippage or failure.
Transmission Slippage
Transmission slippage occurs when gears fail to fully engage, causing power loss or unusual engine revving. Causes include worn clutches or low fluid.
Trailer Repair
Trailer repair addresses structural, braking, suspension, or electrical issues on trailers to keep them safe and roadworthy.
Trailer Service
Trailer service includes routine inspections, lubrication, brake adjustments, and minor repairs to prevent breakdowns.
Trailer Maintenance
Trailer maintenance covers regular servicing of brakes, lights, suspension, tires, and frame components. Consistent maintenance extends trailer life.
Tire Repair
Tire repair fixes punctures, cuts, or sidewall damage. Proper repair prevents blowouts and ensures safety.
Tire Rotation
Tire rotation moves tires to different positions on the truck to promote even wear and extend lifespan.
Tire Pressure Monitoring
Tire pressure monitoring systems alert drivers to low or high tire pressure, helping prevent tire damage and improve fuel efficiency.
Truck & Trailer Alignment
Truck and trailer alignment ensures wheels are correctly positioned relative to the frame and road. Proper alignment improves handling and reduces tire wear.
Torque Converter
A torque converter transfers power from the engine to the automatic transmission, allowing smooth acceleration and load handling.
Throttle Position Sensor
The throttle position sensor monitors the throttle valve and sends data to the ECM to control fuel injection and engine response.
Truck Electrical Diagnostics
Truck electrical diagnostics uses specialized tools to identify faults in the battery, alternator, wiring, sensors, or ECM. Accurate diagnostics help prevent downtime and costly repairs.
U
U-Joint (Universal Joint)
A U-joint allows the driveshaft to flex and transmit power at angles between the transmission and axle. Worn U-joints can cause vibration or drivetrain damage.
Underbody Inspection
Underbody inspection checks the truck’s frame, suspension, brakes, and drivetrain for damage, corrosion, or wear. It is essential for preventive maintenance and safety.
Unit Injector
A unit injector combines the injector and pump into one component, controlling fuel delivery and timing in diesel engines. Proper function ensures efficient combustion.
V
Valve Train
The valve train includes components that open and close engine valves, such as camshafts, lifters, and rocker arms. Proper maintenance ensures efficient engine performance.
Vacuum Leak
A vacuum leak occurs when air enters the engine through unintended paths. It can cause rough idling, poor fuel economy, and emission issues.
Voltage Regulator
The voltage regulator controls the alternator output to maintain consistent electrical voltage for the truck’s systems and battery charging.
W
Wheel Alignment
Wheel alignment adjusts the angles of tires to ensure proper contact with the road. Correct alignment improves handling, tire life, and fuel efficiency.
Wheel Hub
The wheel hub connects the wheel to the axle and houses the bearing, allowing smooth rotation. Maintaining hubs prevents noise, vibration, and wheel failure.
Wiring Harness
A wiring harness organizes and protects electrical wires throughout the truck. Damaged harnesses can cause shorts, sensor errors, or system failures.
X
Xenon Headlight System
Xenon headlights use high-intensity discharge bulbs to provide brighter, longer-range illumination than standard halogen lights. They improve visibility and safety.
Y
Yoke (Driveshaft Yoke)
The driveshaft yoke connects the driveshaft to the transmission or differential. Proper lubrication and inspection prevent vibration and drivetrain wear.
Z
Zero Lash Adjustment
Zero lash adjustment ensures there is no gap between steering or valve components. Proper adjustment reduces wear, noise, and improves performance.