1.2L REVOTRON Bi FUEL CNG ENGINE 121 NOTE Follow the guidelines for NPT threading for assembly. 2. Use a suitable Teflon tape (minimum density of 1.2 g / cc) and wrap three complete turns on the cylinder valve thread in the direction of male tapered thread spiral for complete and join with a slight overlap. 3. Make sure that tape does not overhang the first threads it may block passage / small orifices in the valve. 4. Cut-off excess tape and draw free end of the tape and press firmly at the overlay point. 5. Put the rubber gasket on the valve thread. 6. Insert the valve thread into the cylinder neck manually and screw it in clock-wise direction till the threads do not engage further 7. Hold the cylinder in a suitable fixture. 8. Tighten the valve to a torque value 21-23 Kgm using a torque wrench & tightening tool (Part No: 5402 5890 47 01) as shown below. CAUTION Do not try to screw / unscrew the valve by holding the manual ON /OFF knob. After complete installation of the cylinder valve, check all the connections of cylinder valve and then slowly open the manual ON/OFF knob of the valve until it is fully open. NOTE Never try to remove the cylinder valve on vehicle. Removal of cylinder valve from cylinder shall done by TATA Motors Ltd authorized dealers or government authorized cylinder recertification agencies only.
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