BEARING 3187355 - Caterpillar

Pickling
Note: The piping must be flushed with water before pickling. The Engine and the auxiliary equipment MUST be isolated from the pickling process. Only the piping that was fabricated in the field should be pickled.
Add acid to the water at normal room temperature. Do not add water to the acid. Add neutralizing agents to the water. Do not add water to the neutralizing agents. There are many safety precautions when handling acid. Therefore, this should only be done by qualified personnel.
Fill the tank with the hydrochloric acid pickling solution. See the ""Instructions For Pickling"" section of this Special Instruction.
Open the isolation valves.
Start the pump and begin heating the pickling medium. After the pickling solution reaches a temperature of 40 to 50 °C (104 to 122 °F), begin timing the pickling process.
Monitor the dissolved iron content. The level of the dissolved iron content should not exceed 10% in the hydrochloric acid pickling solution or 6% in the sulfuric acid pickling solution.
The piping should be pickled for 5 hours. Check the piping after every hour. Ensure that iron is not excessively removed from the piping.
Stop the pump. Isolate the flushing tank.
Drain the flushing tank.
Clean the flushing tank.
Open the vents and the drains in the piping.
Drain the piping.Note: The pickling solution must be disposed of in accordance with the local laws and regulations.
Close the vents and drains.Neutralizing
Add acid to the water at normal room temperature. Do not add water to the acid. Add neutralizing agents to the water. Do not add water to the neutralizing agents. There are many safety precautions when handling acid. Therefore, this should only be done by qualified personnel.
Fill the flushing tank with the neutralizing solution. See the ""Instructions For Pickling"" section of this Special Instruction.
Open the isolation valves on the flushing tank.
Start the pump. Monitor the neutralizing solution. Keep the pH ≥ 6.5 by adding the neutralizing solution. If checking the pH is not possible, fill the tank, and circulate the solution through the piping. Drain the piping three times. Pass the total volume of the system through the piping five times or pass the volume for 30 minutes. Perform this operation for the greater amount of time, before you change the solution.
Circulate the neutralizing solution until the pH ≥ 6.5 for a 30 minute period without adding more solution.
Stop the pump. Isolate the flushing tank.
Drain the flushing tank.
Clean the flushing tank.
Open the vents and drains in the piping.
Drain the piping.
Blow out the piping with compressed air.
Close the vents and drains. Begin at the pressure air source.
Disconnect the compressed air.
Visually inspect the pipe at several different locations in order to ensure that the mill scale has been removed. If the mill scale has not been removed, the pickling procedure must be repeated.Final Flushing
Note: All of the piping with the mill scale must be pickled before flushing.
Bypass the Engine and the auxiliary equipment. All of the piping that was fabricated in the field must be flushed.
Flushing can be performed with water or flushing oil.
Fill the system with