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Pentalift Blog - Hydraulic levellers

What is Auto Return on a Hydraulic Dock Leveler?

In the majority of applications the dock attendant positions the dock leveler on the truck. When the truck is loaded the dock attendant typically operates and returns the dock leveler to the stored closed position. If there is no dock attendant and the truck departs with the dock leveler in position the dock leveler lowers and the lip slowly retracts. If equipped with an optional auto return when the lip reaches the fully retracted position a limit switch is activated. This starts the lift motor. The deck raises and the lip clears the lip keepers. The timer shuts off the motor and the deck lowers to the properly stored closed position.

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What are the benefits of a PentaFlow Cylinder?

Most manufactures hydraulic lift cylinders design dead end at maximum extension which can cause internal damage to the cylinder. Pentalift developed the PentaFlow hydraulic lift cylinder that removes dead ending. An internal mechanical valve opens at full extension and oil is routed back to the reservoir without pressure build up. Another advantage of the PentaFlow cylinder is the ability to purge/bleed air from the hydraulic system automatically. When the lift cylinder reaches full extension keep the up button depressed this purges the hydraulic system, any trapped air is routed to the reservoir out of the hydraulic lines.

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Why would a company decide to go with an edge of dock?

An edge of dock is an effective alternative to a manual dock plate. The equipment can easily be removed or transferred to another site. The down side of an edge of dock application is that it is only primarily designed for light duty applications involving pallet trucks or carts. The leading reason for a company to purchase an edge of dock would be because of its price and application. Edge of docks are available in both can be manual or hydraulic both being very easy to operate.

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Why are projected or cantilevered dock leveler pits required?

The majority of loading dock areas has a level approach as the truck backs into the loading dock bay and contacts the dock bumpers. In some applications the truck backs down a declined approach to get to the loading dock bay. Without making special pit considerations the top of the truck’s trailer could impact the building wall or the closed overhead door causing severe damage before the bottom of the trailer contacts the dock bumpers. In this application it is recommended to extend or project the pit and the dock bumpers forward to ensure the truck contacts the dock bumpers first. As a guideline project the pit 1” forward per every percent of declined approach.

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How to decide between a dock lift and a dock leveler?

To decide between a dock lift and a dock leveler you must first look at the application. Applications that do not have a conventional 48” high dock area would require ground level loading. Dock lifts are the best way to handle ground level loading applications. Dock levelers are best suited for applications that do have a fixed 48” dock height and are best for applications that require frequent use. Both pieces of equipment are safe and offer efficient ways of loading or unloading items from a truck.

Contact a Pentalift Sales Representative for more information.

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