tender for overhauling of 2nos. circuit breaker at 132 kv sub-station agra cantt agra - 2 nos. 132 kv cgl make (air compressor type) overhauling of complete mechanism assembly including opening of control valve assembly holding latch, anti-pumping pin assembly, opening of pnematic system, cylinder, shock absorber etc. cleaning and greasing of resesvoir, checking of electrical connection and tightening of all connection and tightening of all connection including rectification of air leakage from nrv, safety valve, replacement of consumables like roller-d, o ring and other required rings and seals (if necessary), servicing of air compressor satisfactorily operation of circuit breaker electrically and opening of breaker manually