Installation: Pneumatic lifts (4 units)

Technical drawings

Attention

If the car needs to be statically lifted for a long period of time, it is essential to place the safety wedges to support it.

In order to carry out in situ works it is necessary to lift the vehicle with pneumatic lifts and place the trestles designed for that purpose (“towers”). These trestles support the vehicle more rigidly then the safety props and so prevents it from lateral flexions when the same efforts are demanded.

Do not get under the car without placing the safety elements needed to guarantee your physical integrity.

Cylinder position

Cylinders are placed inside the cockpit, two of them behind each of the front wheels and the other two behind the back wheels, far off middle longitudinal axis the vehicle.

Cylinder anchorage

Each cylinder has two anchorage iron straps which are welded on the vehicle structure. The lower iron strap supports the vehicle weight while the upper iron strap prevents lateral misalignments. Cylinders must be placed in a way that the lift foot is over the lower level of the vehicle floor, to protect the vehicle from different irregularities of the racetrack. Under these conditions, the iron straps must be centered on the lift thread in order to make little corrections to its height. The three units must be placed at an equidistant height from the floor ensuring a correct leveling of the vehicle. It is also important to place the cylinders perpendicularly to the floor in both directions.

Socket Position

The position of the socket must be chosen considering that it remains protected from bumps as well as from impurities which may filter the loading circuit, taking also into account the comfort and speed while lifting the vehicle. In case of a tourist vehicle, it would be preferable to place the socket in the original place for fuel loading since, at this point; it complies with the requirements mentioned above.

Length and features of the piping

The conduits can be plastic (with JIC connections) or lead pipes (with ferrules), resistant to pressures over 500psi. The piping length must be established once the place for the anchorage cylinder and the location of the filling socket are set.

The suggested disposition and dimensional features can be observed in the following figure:

Calibration

Once the whole system is built, the pressure regulator of the nitrogen tube must be calibrated. Calibration must be done following these steps: firstly, the regulator will be calibrated at an approximate pressure of 250psi. Then, this pressure will be given to the system and the regulator pressure will be increased progressively until the vehicle is completely lifted. It is important to point out that this operation must be carried out when the vehicle is in normal conditions of functioning.

Instructions for use

Place the socket into the plug with the spherical valve being closed, and open it progressively to avoid that the lifts hit against the floor. Once the vehicle is lifted, close the valve. Then, open the small key progressively to make the vehicle lower in the same way. Lubricate the lead tube of the pneumatic lift periodically with silicon grease (“white grease”) or vaseline to obtain a longer lifespan of the equipment.

Cautions

• Do not exceed the 400psi of working pressure.
• Do not place the cylinders in high temperatures places.
• Do not pressurize the system with the car already lifted, it means, if the lifts are not on the floor.
• Do not clean the lifts with hydrocarbons or their derivatives.
• After cleaning the lift mobile lead tube, lubricate it properly.
• Do not turn the upper cover of the lift.
• Check that the lift foot rests on a flat floor.
• Do not remove the cap. Airjack is under pressure.