P.V. Ramdev explains the general checkpoints for monsoon season

 Tower cranes are the critical equipment in the construction industry and face abnormal breakdown during the monsoon. Hence, preventive maintenance for monsoon is essential to reduce the down time.  Majority of the technicians or engineers are not aware of this important aspect. Also, extended production pressure due to approaching monsoon forces
them to skip preventive maintenance. A brief check up schedule is discussed here:
• To prevent water entry in to motors, cover only the motor terminal boxes with plastic. Do not cover the fan or motor body which may restrict cooling air flow and may burn the motor.
• Ensure all electrical panels are closed property if the panels are to be covered with plastic do not cover the cooling fans.  Because the VFD (variable frequency drives) have their own protective cooling system. This hot air must be flown out from the panel.
• Check all the limit switch (hoist slew and trolley) covers are fixed properly.  Check the cable glands are intact. If not, cover the cable entry points with plastic.
• Check the cable entry of overload and over moment limit switches and protect it from water.
• Check all gear box oil filling caps and breather caps to avoid water entry into gear box oil. If water mix with oil will damage the seals as well as corrode the internal parts.
• Check the hoisting brake drum and liners have proper rain cover. Water entry to the braking system not only corrodes the parts but may slip the lifting loads.