Fuel Line Coupler: Service and Repair
PRECAUTIONS^ Lighting of Fires Prohibited.
^ Keep flames away from your work area to prevent the inflammable from catching fire.
^ Disconnect the battery negative cable to prevent shorting during work.
^ When welding or conducting other heat-generating work on other parts, be sure to provide pretreatment to protect the piping system from thermal damage or spattering.
CAUTIONS DURING WORK
Do not expose the assembly to battery electrolyte or do not wipe the assembly with a cloth used to wipe off spilt battery electrolyte.
Piping wet with battery electrolyte cannot be used. Be careful not to give a bending or twisting force to the piping during the work. If deformed, replace with new piping.
REMOVAL
1. Open the fuel cap to relieve the fuel pressure in the tank.
^ If the fuel quick-connect fittings are dusty, clean with an air blower, etc. and then remove it.
^ As some pressure may remain in the piping, cover the connector with a cloth, etc. to prevent the splashing of fuel in the first disconnection of the piping.
2. For removal of the delivery pipe (feeding fuel to the engine), hold the connector in one hand, and hold the retainer tab with the other hand and pull out the connector, as illustrated. The pipe can be removed with the retainer attached.
3. For removal of the return pipe (returning fuel to the tank), hold the pipe in one hand, and pull out the connector with the other hand while pressing the square relieve button of the retainer, as illustrated.
NOTE: This work should be done by hands. Do not use any tools. Should the pipe be hard to remove from the connector, use a lubricant (light oil) and/or push and pull the connector longitudinally until the pipe is removed.
^ When reusing the delivery pipe retainer, reuse without removing the retainer from the pipe. If the retainer is damaged or deformed, however, replace with a new retainer.
^ Cover the connectors removed with a plastic bag, etc. to prevent the entry of dust or rain water.
REUSE OF QUICK-CONNECTOR
(Delivery Pipe)
^ Replace the pipe and connector if scratch, dent or crack is found.
^ Remove mud and dust from the pipe and make sure that the end including spool is tree of defects, such as scratch, rust, and dent, which may cause poor sealability. If defective, replace with a new pipe.
^ If the retainer removed according to the removal step above is attached to the pipe, clean and insert it straight into the quick-connector till it clicks. After it clicks, try pulling it out to make sure that it is not drawn and is securely locked.
NOTE: The retainer, once removed from the pipe, cannot be reused. Just replace with a new retainer. Insert the new retainer into the connector side until it clicks, and connect the pipe as inserting it into the retainer until it clicks.
(Return Pipe)
^ Replace the pipe and connector if scratch, dent or crack is found.
^ Remove mud or dust from the pipe and make sure that the end including spool is free from defects, such as scratch, rust, and dent, which may cause poor sealability. If defective, replace with a new pipe.
^ After cleaning the pipe, insert it straight into the connector until it clicks. After it clicks, try pulling it out to make sure that it is not drawn and is securely locked.
ASSEMBLING ADVICE
Application of engine oil or light oil to the pipe facilitates connecting work. The work should be started immediately after lubrication, since dust may stick to the pipe surface to cause poor sealability if a long time passes after lubrication.
TEST/INSPECTION AFTER ASSEMBLING
1. Reconnect the battery negative cable.
2. Turn the ignition key to the "ON" position and check pump start-up sound. As the pump is actuated to raise fuel pressure, check and see if fuel leaks from the piping system.
3. Make sure of no fuel leakage by conducting the above fuel leak check a few times.
4. Start the engine and make sure of stable idling speed and normal vehicle operation. The entry of dust during the work may sometimes affect the fuel injection system.