NANO

74 ENGINE 273 MPFI PRECAUTION Do not overtighten or under tight the compressor belt. (Ensure that compressor belt tension at tight side using belt tension meter / clevis gauge. It should be between 175 – 185 Hz on lower span for new belt & 145 – 155 Hz for the used belt.) • Tighten upper sliding bolt. • Tighten lower mounting bolt of compressor. • Connect battery terminals. • Start the engine & confirm the proper alignment & functioning of belt. Belt Tension : Check the conditions of belts on the engine. Examine the edge of the belt for cracks or fraying. Check the tension of the belt by pushing on it with your thumb for Alternator belt and AC compressor belt at location indicated. It should be 5 to 6 mm. If the belt tension is not proper, get it attended at the nearest authorised service outlet. Correct tension of the belt is very critical from belt life and belt noise point of view. It is recommended that belt tension should be measured with clavis gauge to ensure recommended values as given below Alternator belt Frequency should be checked in middle of lower span of belt. New belt to be re-tensioned to 150 ~ 155 Hz (125 ~ 130 Hz for used belt) on vehicle after running for 15 min. AC compressor belt Frequency should be checked in middle of lower span of belt. New belt to be re-tensioned to 180 ~ 185 Hz (150 ~ 155 Hz for used belt) on vehicle after running for 15 min.