Trolley jacks

Types of Trolley Jacks

A trolley jack, also known as a 2-ton floor jack or a hydraulic trolley jack, is a common type of jack that is used to lift heavy loads, particularly vehicles. The trolley jack gets its name from the fact that it is mounted on a trolley, which allows the jack to be moved easily. The trolley jack consists of two large wheels at the front, which enable the jack to be rolled on the floor like a trolley.

The hydraulic trolley jack has a jack handle that is used to pump a piston in the hydraulic system. When the piston is pumped, the pressure in the piston chamber rises, causing the piston to move up. This upward movement of the piston raises the load beam and, in turn, raises the load that is placed on the load beam. One interesting thing about the hydraulic trolley jack is that even a small stroke on the handle results in a large stroke on the jack's lifting arm. This is made possible through the use of a jack handle linkage system that provides a mechanical advantage.

Trolley jacks come in different types, which include:

• Hydraulic Trolley Jack:

  This jack uses hydraulic power to lift vehicles. It consists of a hydraulic pump, hydraulic cylinder, and jack frame. To use this jack, the user pumps the handle up and down. This action drives the hydraulic fluid into the cylinder. As the fluid enters the cylinder, it generates pressure and causes the piston to rise. The rising piston lifts the vehicle. The hydraulic trolley jack is very easy to use and can lift heavy loads with less effort.

• Aluminium Trolley Jack:

  This jack is made from aluminum. The aluminum trolley jack combines the features of the hydraulic jack and the mechanical jack. It uses the hydraulic mechanism to lift loads, but it is also very lightweight, which is the major advantage of this jack. The aluminum jack is ideal for users who need a jack that is quick to lift and easy to carry.

• Low Profile Trolley Jack:

  The low-profile trolley jack is designed to lift vehicles that have a low clearance height. This jack has a low height and large lifting range, making it possible to slide the jack under the vehicle and lift it to a great height.

• Electric Trolley Jack:

  The electric trolley jack is used to lift vehicles quickly and with less effort. It uses an electric motor to drive the hydraulic pump. This eliminates the need for manual pumping. The electric jack is suitable for people who are not able to lift heavy loads physically.

Specifications and Maintenance of Trolley Jacks

• Load capacity

  Every trolley jack has a maximum load capacity. This is the highest weight it can lift and support safely. If the vehicle weighs more than this, the jack could fail. A typical load capacity ranges from 1 to 3 tons.

• Lift height

  The lift height is the distance between the saddle and the ground when the jack is fully raised. This measurement determines how high the jack can lift a vehicle. For most trolley jacks, the maximum lift height is 140 to 500 mm.

• Minimum height

  The minimum height is the distance between the saddle and the ground when the jack is fully lowered. A smaller minimum height allows the jack to fit under vehicles with low ground clearance. The minimum height for most trolley jacks ranges from 80 to 150 mm.

• Weight

  A lighter trolley jack is easy to move and carry. However, the weight also affects the jack's stability and strength. For most jacks, the weight ranges from 15 to 25 kg.

• Stroke

  The stroke is the distance the lifting arm moves when the jack is pumped. A longer stroke means the user has to pump fewer times to lift the vehicle. For most trolley jacks, the stroke ranges from 100 to 300 mm.

• Material

  Trolley jacks are commonly made from steel or aluminum. Steel jacks are more durable, while aluminum jacks are lighter.

Trolley jack maintenance is important for safety and to prolong the jack's lifespan. Some maintenance tasks are:

• Check for wear and damage: Users should inspect the jack for signs of wear or damage before and after each use. They should replace any worn or damaged parts immediately.
• Clean the trolley jack: Dust, dirt, and debris can affect the jack's performance. Users should clean the jack regularly with a damp cloth.
• Lubricate the trolley jack: Lubrication reduces friction between the moving parts of the jack. Users should apply a few drops of oil to the wheels and the lifting arm pivot point every 3 months.
• Check the hydraulic fluid level: The hydraulic fluid is the oil inside the jack. It transfers the force from the pump to the lifting piston. Users should check the fluid level regularly to ensure it is at the recommended level.
• Bleed the jack: Over time, air can enter the hydraulic system of the jack. This reduces the lifting power. Users should bleed the jack every 6 months to remove any air from the hydraulic system.

How to choose trolley jacks

There are many factors to consider when purchasing a trolley jack for business. Here are some of them:

• Weight capacity:

  The number of heavy-duty hydraulic jacks that can be used to lift various types of vehicles varies depending on the model. When choosing a trolley jack, it is important to consider the weight capacity and ensure it can handle the vehicles' weights. For example, a jack with a capacity of 1.5 tons may only be suitable for small cars, while a jack with a capacity of 3 tons or more would be needed for larger SUVs or trucks.

• Lifting height:

  Different models of trolley jacks have different lifting heights. The minimum and maximum heights of a trolley jack should be considered when choosing one. The jack should have a sufficient lifting height to provide enough clearance for the vehicles being serviced.

• Construction material:

  Trolley jacks are usually constructed with steel or aluminum. Steel jacks are more durable and can handle heavier loads, while aluminum jacks are lightweight and portable. The construction material affects the weight and portability of the trolley jack.

• Size and weight:

  The size and weight of the trolley jack should be considered. A lightweight and portable jack is easier to move and stored, but it may not have a large lifting capacity. A larger jack may have a higher lifting capacity but may be heavy and difficult to transport.

• Wheels:

  The wheels of a trolley jack affect its mobility. Jacks with larger wheels are easier to maneuver on uneven surfaces. The material of the wheels is also important; those made of durable materials will last longer.

• Safety features:

  Safety features that prevent accidents when using trolley jacks should be considered. Some common safety features include overload valves that stop the jack from lifting loads greater than its capacity, safety stands that prevent the vehicle from falling if the jack fails, and a locking mechanism that prevents the jack from collapsing accidentally.

How to DIY and Replace Trolley Jacks

Replacing a trolley jack can be a straightforward process. However, before commencing, users should read the manual and understand the jack's components. Here are some steps to replace a trolley jack:

• Select the Right Replacement Jack

  Selecting a replacement trolley jack that meets the requirements of the vehicle is essential. Factors such as weight capacity, lifting height, and dimensions should be considered.

• Prepare the Old Trolley Jack

  Once the new trolley jack is ready, the old one should be removed. Before removing the old jack, users should ensure that the vehicle is parked on a level surface and that the parking brake is engaged. They should loosen the wheel lugs slightly and place wheel chocks on the wheels that won't be lifted. Then, they should raise the vehicle using the new jack and position the jack stands under the recommended support points. After that, they can dislodge the old jack.

• Install the New Trolley Jack

  Before installing the new jack, users should read the manual and understand the installation procedures. After that, they can position the new jack to align with the manufacturer-provided lifting points. Then, they should attach the jack at the recommended locations using the provided hardware or fasteners. Once securely mounted, they should connect the jack to the power source.

• Test the New Trolley Jack

  Once the new trolley jack is installed, users should perform a test lift to ensure everything is working well. They should follow the manufacturer's instructions and lift the vehicle slowly. During the test lift, they should check for any unusual noises, vibrations, or leaks. Once satisfied, they should remove the wheel chocks and ensure the vehicle can move.

Q&A

Q1: How long do trolley jacks last?

A1: There is no specific period a trolley jack can last. Generally, its longevity depends on the maintenance practices, how often it is used, and the quality of the trolley jack.

Q2: Can people put a trolley jack under any vehicle?

A2: No, it's not advisable to put a trolley jack under any vehicle. Every vehicle has recommended lift points where jacks can be safely positioned. Putting a jack under an unapproved spot can damage the vehicle and be unsafe during lifting.

Q3: Can a trolley jack lift a heavy truck?

A3: A trolley jack can lift a truck if it has been specifically designed for that purpose. Trolley jacks have lifting capacity limits, and those for truck use have higher capacities than those for car usage.