What is the difference between telescopic and hinged-type dock levelers?

The key difference lies in how the lip moves. With hinged-type dock levelers, the lip flips upward and then drops down to rest on the edge of the truck’s tailgate; whereas with telescopic dock levelers, the lip is driven by a hydraulic cylinder to extend horizontally forward, reaching directly into the truck’s cargo area floor (typically extending 500–800 mm). For refrigerated trucks with bottom guide rails or fully loaded box trucks, the telescopic type is the only safe option, effectively preventing the risk of forklifts derailing.

What are the site requirements for installation?

The most critical factor is the civil engineering foundation pit. The fixed leveling plate must be embedded within the concrete structure of the loading dock, so you need to reserve a pit in advance. The standard pit depth is generally 550–650 mm, and the pit width should be approximately 100 mm wider than the width of the equipment. Additionally, high-strength steel must be embedded at the front edge of the foundation pit, and the concrete strength grade must be no less than C30. We recommend requesting accurate foundation pit construction drawings (Pit Drawing) from the manufacturer before purchasing so that the civil engineering team can prepare the pit accordingly.

What safety features prevent accidents if the truck drives away after the telescopic tongue plate is extended?

The product comes standard with a Truck Restraint / Safety Hook mechanism. The hydraulic system is equipped with a safety relief valve; if a hose ruptures, the platform will lower slowly rather than plummet. Additionally, during daily use, physical locking must be achieved using the Maintenance Strut; entering the pit for maintenance without mechanical locking is strictly prohibited.

Why does my forklift vibrate heavily when driving on the leveler?

There are typically two reasons: First, the overlap gap is too large, so the telescoping tongue does not fully contact the truck bed after extension, leaving a section suspended in the air; second, the height difference between the loading dock and the truck bed exceeds the adjustment range (standard: ±300 mm). We recommend checking the hydraulic oil level and confirming that the vehicle’s height—whether empty or fully loaded—falls within the equipment’s adjustment range. Operating outside this range will significantly shorten the equipment’s service life.

Can the telescopic lip get stuck on the truck floor when extended? How can this be prevented? A:

Yes, it can. This is the most common operational issue encountered with telescopic lip plates. When the truck floor is severely deformed (dented or warped), covered with heavily worn rubber mats, or has protruding weld scars or rivets, the lip plate may get stuck or scratched as it extends. Prevention strategies: ① Choose a high-end model equipped with a floating sensor system, which automatically retracts the lip and triggers an alarm when it encounters resistance; ② Visually inspect the truck bed floor for levelness before operation and remove any obvious obstacles; ③ Confirm the lip’s ground clearance in the technical specifications (typically 30–50 mm); a larger clearance improves passability but reduces stability when the lip is extended—a trade-off must be considered.

Why does the platform warp or sink after several years of use?

This is typically caused by fatigue deformation or settlement of the foundation pit. Troubleshooting steps: First, inspect the foundation pit: Check whether the concrete edges are cracked or have sunk. If so, this is a civil engineering issue requiring re-pouring and reinforcement, which is outside the scope of the equipment warranty. Next, check the deformation of the main plate: Use a level to measure the platform’s diagonals. If the deformation exceeds 0.5% of the platform’s width (e.g., >10 mm for a 2000 mm wide platform), the main plate must be replaced. Welding repairs are not recommended, as welding heat-treated steel plates carries a risk of brittle fracture. Daily Prevention: Avoid overloading by more than 20%. In particular, the lateral shear forces generated when forklifts brake or turn abruptly cause the most damage to the main deck.

How to verify the steel plate thickness is genuine?

This is a major area where the industry cuts corners; many small manufacturers label their products as “8 mm” when they are actually only 6 mm thick. You can perform a self-inspection using the following methods: Visual Inspection and Weighing Method: Standard 8mm-thick checkered plate weighs approximately 62.8 kg per square meter. Alternatively, use a caliper to measure; we strictly adhere to industry standards. Risk of Bending: When a platform with insufficient thickness is subjected to sudden braking by a fully loaded forklift, the front edge may experience permanent downward bending. Once this occurs, the entire section must be replaced; it cannot be repaired.

What Else Do We Offer?

Do you provide CAD drawings? Yes, we can provide 2D/3D CAD files containing detailed dimensions and cutout locations for direct import by your design firm. How long is the warranty period? What does after-sales service cover? The standard warranty is 12 months; structural components (main plates/tongue plates) can be extended to 24 months. We have overseas service partners who can provide remote video guidance and air freight delivery of spare parts. What is the lead time? For standard specifications, 15–20 business days after receiving the prepayment; for custom cryogenic units, please allow an additional 7–10 days. Is the packaging suitable for ocean freight? We use fumigation-free wooden crates wrapped in stretch film and bubble wrap. A standard 20-foot container can hold 4–6 units (depending on dimensions).