Answer / cs reddy

Bolts are getting loose due to Vibration.
Vibrations may be due to :
a) Misallignment.
b) Improper foundation.
c) Improper Mass Balancing.

Answer / manoj saah

Coupling Misalligment may be major reason.

So do allignment by using Dial Gauge and clearance should
0.05 mm.

Answer / girish

Vibration is a main reason
1. Reduce vibration using vibration isolating mounts
2. use flexble coupling with lock nuts

Answer / rakshit

dumb people .... they have specified 1010 KVA ... which is
very high capacity.... high shear force exists if proper
rated engine is not coupled to generator ,,,, due to high
shear force.. wear in coupling.. wear in coupling... loose
studs... .. also greater vibrations is the cause

Answer / faisalabad

you may use self locking nut as well as suitable grate lock tight according bolts specfication

Answer / pavan

Use lock nuts. Because vibrations are unavoidable (but can
only be minimized), using lock nuts is always safe.

Answer / nagarajan

I Think u can make use of pins in the nuts at specified
tight point of bolt.

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