TUBE AS 6N9747 - Caterpillar

Engine: 3606 (S/N: 8RB) G3606 (S/N: 3XF) 3608 (S/N: 6MC; 8LL; 7WR) G3608 (S/N: 4WF) 3612 (S/N: 9RC; 9FR; 2NZ) G3612 (S/N: 1YG) 3616 (S/N: 1PD; 1FN) G3616 (S/N: 4CG) 3618 (S/N: 2MW)Introduction
The following procedure details the flushing and pickling process. This instruction will also show the requirements for cleanliness that are related to the engine piping that is external to the engine and the auxiliary equipment. This procedure should be used as a guideline.This entire Special Instruction should be read and understood before beginning any work on the engine.Flushing Information And Guidelines
General
The quality of the medium that is used for flushing is essential. The medium's quality ensures the performance and the long life of the Caterpillar Engine and the auxiliary equipment. The following items are needed in order to get proper performance from the equipment:
a well designed system
a flushing medium of good qualityThese prerequisites are useless unless the engine piping is initially cleaned in order to prevent equipment damage during the initial start-up. The piping must also be cleaned in order to remove any debris that may have been dislodged in the piping.Cleaning and flushing the new engine piping and the existing engine piping is accomplished by using essentially the same procedure. Contaminants that are introduced during the manufacturing, storage, and installation of the new engine piping must be removed. The flushing of the existing piping removes contaminants that are generated during normal operation, failures, and debris that is introduced during an overhaul. Do not flush the valves, the instrumentation, or the other critical components. If necessary, use temporary bypasses.All of the cleaning and flushing procedures must be done with the agreement from the equipment manufacturer, the installer, the operator, and the flushing medium supplier. No portion of these procedures should be done without a thorough understanding of the possible effects of improper preparation of the system. The installation, cleaning and flushing of the engine piping must not be done by someone without experience.Flushing Program For The Engine Piping
For a system that is assembled in the field, the ability to keep the piping sufficiently clean so that flushing is not necessary is not economical or practical. The flushing must take place after the installation of the system is complete. This must be done prior to the start-up of the system. The success of the flushing depends on the following items:
the success of the initial efforts to keep the particles out
the proper attention to flushing
the design of the systemIf the flushing is successful, a clean pipe and system components are obtained without damage to the equipment from debris.Keeping the particles out of the engine piping from the beginning will make cleaning the piping easier. This is achieved through the work of many people. The following items are examples of these efforts:
The design of the system should allow the system to be cleaned successfully.
The piping and equipment should be properly cleaned and maintained prior to installation.
Contaminants should be prevented from entering the piping during modifications.This list is not nearly