SOP for Planned Preventive Maintenance

Objective

To ensure yearly preventive maintenance of all machines/equipments.

Scope

This SOP applies to all activities involving the yearly preventive maintenance of machine /equipments.

Responsibility

Sr. Controller (Engr & Maintenance )

Procedure

Bucket Elevators

• Lubricate all bearings
• Change oil in the drive system.
• KS Rotary Screen Cleaner: Replace the grease packing in the bearings of the eccentric load motor.

Micronizer

• Lubricate 2 x 38mm pivot pins on the vibratory bed support frame.
• Lubricate the unbalanced vibrators.

Winnower

• Lubricate the unbalanced vibrator.
• Change the grease packing in the bearings of the impact crusher motor.
• Replace the grease in the worm gear screw jack with the hoisting system.
• Check the screw unit for wear, and replace it if the wear on the thread is about 50% and above.
• Lubricate all the bearings.
• Replace the lubricant in the gear units.

Nibrotom 3000

• Change the circulating lubrication oil.
• Change the oil filter.

Pre Grinder

• Lubricate all bearings.

Mid Grinder

• Replace the oil in the coupling of the drive (Shell Tellus oil R10) and the variation of the discharge pump (Omala 220).
• Check wear of the agitator arms, balls and bottom screen, replace if worn.
• Check the packing of the pump units.

Fine Mills

• Check the condition and tension of the belt, and re-tension if necessary.
• Check balls and agitator's arms for wear, replace if worn.

Liquor / Butter Tank

• Inspect agitator blade for wear.
• Clean the tank.
• Replace lubricant in the gearboxes.
• Replace grease packing in the bearings of motors.

ALSO READ: SOP for Calibration of Thermohygrometer

Duyvis Press A & B

• Replace O-rings of GS valves of the hydraulic unit.
• Replace O-rings and backup rings of the MVE and SVE valves of the hydraulic unit.
• Change oil in the hydraulic unit.
• Replace guard rings, O-rings, and seals of the filling system.
• Apply fresh grease to the system.
• Clean the pressure gauge, pressure switch and dump valve of the liquor pump.
• Clean the liquor-conditioning tank.
• Replace defective support strips of cake trough.
• Change the grease packing in the bearings of all motors.

Boiler

• Drain the boiler completely.
• Open all manholes and hand holes. Remove all packing rests sticking to the contact surfaces without damaging the latter.
• Clean the boiler interior, rinse thoroughly using strong jets of water; in case of boiler scale deposit, remove it and rinse out.
• Provide all monthly maintenance work.
• Clean fire tubes and rear reversing chamber as well as the flue tubes, as well as remove soot deposits.
• Check combustion chamber brick lining.
• Re-grease all bearings.
• Close manhole and hand holes; and insert new packing.
• Refill boiler.
• After starting, strongly retighten all man- and hand holes repeatedly during first working hours.
• Remove flange of the electrode low-water safety device, test electrodes in respect to scale deposits, clean them and test.

Annexure

Nil

Revision History

Nil

ALSO READ: SOP for Preventive Maintenance of Equipments