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Home >>Guidelines >>Safety Code Of Practice For CNG Buses >>Preventive Maintenance

  • Following additional points need to be complied for carrying out preventive maintenance every month, unless and otherwise specified.
    • Replace spark plugs and high tension cables as per manufacturer's recommendations.
    • Check ignition timing by using timing light at engine idle speed (and other speeds as specified) and correct, if required.
    • Check function of 0 2 sensor output (milli-volt variation using multimeter) as per manufacturer's recommendations.
    • Check for any exhaust gas leak before the catalytic converter and correct, if necessary.
    • Replace catalytic converter as per manufacturer's recommendations.
    • One number each type of dry powder type fire extinguisher (2 kg) shall be provided in driver and passenger compartments.
    • Buses should be properly maintained and checked every day before starting and bringing on road.
    • Check for First-Aid kit as per CMVR.
    • Minimum two copies of safety instructions shall be displayed in the passenger compartment.
    • After any accident/ repairs (minor or major) all points as per the checklist to be checked.
    • Any other preventive safety recommendations provided or advised by chassis manufacturers/ retrofitters to be complied with.
Note: The instructions issued by OE manufacturer l retrofitter for preventive maintenance, in their instruction manual, shall contain all the necessary details on the methodology & the procedure for carrying out these checks.

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