Transmission Shift Cylinders: Failure, Replacement & Care
On a truck gearbox, gears that grind, refuse to engage or jump out often trace to a leaking pneumatic shift cylinder, not the transmission: diagnosis and repair.
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Articles
Engine Valve Train & Adjustment Shim: Faults, Replacement, Care
Power loss, rough idle or falling compression on a truck diesel often comes down to valve clearance and worn valve-train parts: diagnosis, shims, replacement.
Compressor Valve & Unloader: Fault, Replacement & Care Guide
Low air pressure on a truck, or a compressor that never cuts out, usually means worn intake and discharge reed valves or a stuck unloader: how to fix it.
Compressor Crankshaft & Drive Assembly: Failure & Replacement Guide
Diagnose, replace, and maintain the air compressor crankshaft and drive assembly on heavy commercial vehicles: fault symptoms, torque values, and service tips.
Pressure Limiting Valve: Faults, Replacement & Maintenance
On a truck, a slow-releasing parking brake or overworked suspension bellows often means a drifted pressure limiting valve: set-pressure check and replacement.
Four-Circuit Protection Valve: Faults, Diagnosis & Replacement
A truck losing air with no leak in sight often has a four-circuit protection valve isolating a burst line: how it prioritises brakes, diagnosis, replacement.
ALB Load Sensing Valve: Faults, Replacement & Setting Guide
Rear axles locking when the truck runs empty, or longer stopping distances when loaded, point to the ALB load-sensing valve: diagnosis and setting.
Air Processing Unit (APU/EAC): Faults, Replacement & Care
Air processing unit (APU/EAC) guide for trucks: how it works, fault symptoms, pressure diagnosis, replacement steps, torque values and cartridge maintenance.
Heavy-Duty Truck Gearbox: Faults, Replacement & Maintenance
Heavy-duty truck gearbox guide: fault symptoms, diagnosis, step-by-step replacement, torque values and maintenance intervals from the VADEN technical team.
Oil Cooler: Failure Symptoms, Replacement & Maintenance Guide
Engine and transmission oil cooler guide for heavy trucks: failure symptoms, internal leak diagnosis, pressure test, replacement steps and torque values.
Truck Oil Pan Group: Faults, Replacement & Maintenance Guide
Heavy-duty truck oil pan guide: leak diagnosis, gasket and drain plug faults, step-by-step replacement, torque values, capacities and maintenance tips.
Brake Caliper Overhaul Kit: Guide Pins, Boots & Adjuster
Truck brake caliper overhaul: guide pin seizure, torn boots and locked adjusters — symptoms, diagnosis, fitting steps, torque values and kit selection.
