VALVE AS-RELIEF 4154991 - Caterpillar

Flushing (Cleaning) Equipment
1 Complete removal of all debris or residue is generally not possible when only a high pressure wash or a high pressure nozzle is used. Therefore the use of a a nozzle with high aerated flow or with high pulsating flow is recommended. One aerated nozzle that can be used is the "Jumbo Jiffy Gun" with "Air Boost" from the Elliott Company. The following chart lists all necessary parts for use with this tool. For more information about these cleaning tools, contact:The Elliott Company
1809 Sheridan Ave.
Springfield, OH 45505 USA
TWS: 810/452-2865
Tel: (513) 324-4191
2 Install a 20 micron filter for filtration of the cleaning solution. [An 8J8850 Filter Group (with 8J1600 Filter Assembly) can be installed as a filter for the cleaning solution.]Operation
1 Use an alkaline cleaning solution (detergent) in a 2 to 3% concentration (by volume) with the Jumbo Jiffy cleaning gun. The cleaning solution should be at a temperature between 43° and 66°C (110° to 150°F). The closer the temperature of the cleaning solution is to the top of the temperature range, the better will be its cleaning action. The air pressure to the cleaning gun should be about 860 kPa (125 psi), and should be supplied at a flow rate of approximately 114 liters (30 U.S. gallons) per minute. Adjust the cleaning gun pressure to 620 kPa (90 psi).2 All oil passages must also be thoroughly cleaned with a brush to make certain that all sludge, carbon deposits and debris are removed. A list of brushes is provided on page 2. The use of these brushes for correct cleaning of the cylinder block is also explained on pages 5 and 6. Do not use brushes together with a Jumbo Jiffy cleaning gun. If a Jumbo Jiffy cleaning gun is available, clean with brushes first, then flush the cylinder block with the cleaning gun.3 All cleaning must be complete and thorough, because incomplete cleaning will only loosen debris or sludge, allowing it to break free after the engine is put into service. This will damage bearings and other components. 4 When the main oil passage in the cylinder block is cleaned, a 3 mm (.125") mild steel rod must be welded to the end of the brush handle, as shown in the illustration. Make sure the rod is long enough to let the brush go all the way through the cylinder block.Cleaning Procedure
Use the following procedure to make sure that all oil passages in the cylinder block are free of debris, sludge and carbon deposits.1 Remove as much external debris and deposits as possible before the engine is disassembled. This will help to avoid contamination of the final cleaning solution and wash tanks.2 While the engine is disassembled, protect the block from dirt and debris accumulations by installing covers and plugs in all oil passage openings, until the block is ready for cleaning.3 When the cylinder block is ready for final cleaning, remove all oil passage plugs. These plugs can usually be removed with a screwdriver