How to Use Truck Axle Locks Correctly?
2 Answers
Truck axle locks correct usage methods: 1. Insufficient power: When the truck feels underpowered while climbing a slope with heavy load, press the inter-axle differential lock switch to engage the inter-axle differential lock. At this point, the truck's two drive axles are connected as a single unit operating simultaneously, providing driving force to all four wheels and enhancing the truck's driving capability. 2. Wheel slippage: If a single wheel slips in mud, press the inter-wheel differential lock switch to engage the inter-wheel differential lock. This connects the left and right wheels of the truck as a single unit operating together, distributing power to the non-slipping wheels, allowing the truck to continue moving. 3. Heavy load: In extremely poor road conditions with heavy loads, to avoid sudden loss of driving power and potential danger, it is generally necessary to engage both the inter-axle and inter-wheel differential locks simultaneously. This combines all four drive wheels of the truck into a single synchronized unit, ensuring the truck maintains driving power even if one wheel loses traction.
I've been driving long-haul trucks for many years, and the differential lock is a lifesaver in off-road situations, but misuse can lead to big trouble. For safe operation, only engage it on terrain where it's truly needed, like deep mud, slippery snow piles, or when wheels spin in sand. Before engaging, come to a complete stop, apply the parking brake, and shift into low gear—I usually use first gear. Once the differential lock is on, drive gently, keeping speed under 20 km/h; avoid sharp turns to prevent damage to drivetrain components. Always stop to disengage after use—never leave it on dry pavement, or the differential will overheat and fail, leading to costly repairs. Once during a mountain delivery in a rainstorm, my wheels got stuck, and using the lock properly got me out. But a friend forgot to disengage before accelerating and seized the system, costing over 5,000 in repairs. Make it a habit: regularly check fluid levels, apply grease to prevent rust, ensure switches work, and prioritize safe driving. The differential lock is for emergencies, not casual use—mastering proper operation ensures safety and saves money.
