Standard Operating Procedure for Cooling Tower Fan Maintenance

SOP Number: Hotel Engineering SOP  – 13

Department: Engineering and Maintenance

Date Issued: 24–Feb-2018

Time to Train: 30 Minutes

Cooling Tower Fan Maintenance Checklist and Procedure:

Required Tools:

  • Screwdriver.
  • Clamp meter.
  • Crimping Tool.
  • Megger.
  • Oil Can.
  • Grease Gun.
  • Plier.
  • Spanner Set.
  • Brush.
  • Bush.
  • Line Tester.

Consumable Parts:

  • PVC tape.
  • WD- 40.
  • Lubricating Oil.
  • Grease.
  • Carbon removing compound.
  • Old cleaning clothes.

Cooling Tower Fan Maintenance Activity:

Cooling Tower Fan :

  • Check the shaft position, in case if the shaft is loose tighten it.
  • Check the shaft alignment and fix it if required.
  • Check the key position and any loose key to be replaced or tightened.
  • Check the fan blade positions, any loose blades to be tightened.
  • Change or replace any broken fan or fan leaf.
  • Check the ball bearing and if required do oiling/greasing.
  • Change the bearing if it is noisy.
  • Check the oil level of the gear.
  • Check and verify the gear assembly, any broken teeth to be replaced.
  • Check the foundation and verify if it is broken/loose.


  • Motor Should be of minimum 30 HP.
  • Electrical control should be proper.
  • Check for any burnt contact, loose electrical connection and overall operation to be checked.
  • Overload relay should be checked.
  • Check the operation of the relay, setting and loose electrical connections.
  • Check the timer operation and time settings.
  • Check for any loose electrical connection.
  • Check for any loose & burnt electrical connection.
  • Check the MCB rating and verify with the recommended Amp.
  • Check Terminal Plate, Any burnt and broken plate need to be replaced.
  • Check the motor bearing.
  • Perform oiling, greasing or change the bearing if required.
  • Check the internal Resistance Value.

Other points to check:

  • Check at the full Load motor capacity should be 42 Amp.
  • Check and verify the overload relay setting should be 22 Amp.
  • Overload relay range should be between 14Amp to 23Amp.
  • Check and verify the control fuse rating at 4 Amp.
  • Check and verify the MCB rating should be at 250 Amp.
  • Check and verify the timer settings should be set at 10 sec.

Remarks by the Technician: