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If you are in need of removing an air tank to gain clearance for the purpose of installing a frame component, the new fittings require an air line fitting release tool. The release tools are available to order from your Volvo dealer and are available in plastic (kit part number 85152447) or metal (kit part number 88800414). To assist you with the new air line fittings, attached is a Design and Function document of the new air tubing and fittings.
The air tube is made up of polyamide material, commonly known as nylon.
To carry the compressed air between components with no or relatively less movement, nylon pipes or
rubber hoses are used. To carry the compressed air between components with relatively more
movement, only rubber hoses are used.
Nylon pipe, construction
The nylon pipe is a solid core with single ply extrusion. The nylon pipe with outer diameter (D) greater
than 6.35 mm, is a solid core covered with protective colored layers with fiber reinforcement between the layers. The cover is resistant to heat and sunlight.
Air tube, material
The hose is about three layers of rubber and reinforcement. The rubber hose is cut to a specific
length and fittings are crimped on both ends.
Types of pneumatic quick fittings
Push in fitting system, construction
Push in fitting system, overview
The fitting (5) consists of a dust seal (3) to prevent the entry of dust and other contaminants.
The fitting (5) also consists of a check valve (6) which allows the air to escape when the fitting is
under pressure. The check valve (6) also ensures that the tube is properly inserted into the fitting.
Note: the tube is not properly fitted, there will be leakage of air.
The fitting has a plastic arm (7) which breaks when the tube is installed properly.
Note: A clicking sound will be heard when the tube is installed properly for first time.
Note: The fitting can be used a maximum 5 times either for removal or installation.
The building block (9) has plastic clips (10) on either side which locks the swivel (8).
Air leakage between swivel and building block
Leakage of air at (A) indicates that the assembly is not fitted properly.
To remove the tube, a release tool (11) is used.
Position the tool on to the tube.
Push the tube into the fitting.
Rotate and push the tool to secure it fully into the fitting.
The tool will open the grip ring (2) and prevents the locking of the tube.
Note: The tool should be pressed against the fitting during the tube removal process.
Standard snap ring pliers (12) are used to disassemble the swivel (14) and building block (13) .
While replacing the components like valves, air reservoirs or air bellows, the fittings can be removed along with tube.
Check the condition of O-rings on the fittings.
Note: Ensure that the O-rings are seated properly on the fittings before installing.
Note: If necessary, replace the O-rings.
Install the fitting on to the component.
Note: Ensure that the component is fixed firmly.
Note: Ensure that the tube is free from dust and other contaminants.
Note: Ensure that there is no visual damages to the tube.
Note: Ensure that the tube ends are straight.
Note: Ensure that the tubes are fitted straight into the fittings.
Torque tighten the fittings.
Push the tube into the fitting until it stops.
Note: Ensure that the tube is fitted properly into the fitting by pulling the tube.
Check for leakage.