BUSHING 2909181 - Caterpillar

Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons.The hazards are identified by the “Safety Alert Symbol” which is followed by a “Signal Word” such as “DANGER”, “” or “CAUTION”. The “” Safety Alert Symbol is shown below.
Illustration 2 g00008666This safety alert symbol means:Pay Attention!Become Alert!Your Safety is Involved.The message that appears under the safety alert symbol explains the hazard.Operations that may cause product damage are identified by "" labels on the product and in this publication.Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The safety information in this document and the safety information on the machine are not all inclusive. Determine that the tools, procedures, work methods, and operating techniques are safe. Determine that the operation, lubrication, maintenance, and repair procedures will not damage the machine. Also, determine that the operation, lubrication, maintenance, and repair procedures will not make the machine unsafe.The information, the specifications, and the illustrations that exist in this guideline are based on information which was available at the time of publication. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete, most current information before you start any job. Caterpillar dealers can supply the most current information.Summary
This guideline provides photos to help reduce the scrap rate of reworked cylinder heads and to increase profitability without decreasing quality. The photos in this guideline show cylinder heads that were damaged by broken injector tips.This new procedure for evaluating head damage from injector tip breakage only applies to C9 and C-9 engines at this time. When used in the same application, cylinder heads that meet the specifications in this guideline can be expected to give normal performance.Never install a cylinder head that this guideline shows cannot be used again. During reconditioning, correct any conditions that might have caused the original failure.References
Reference: Reuse And Salvage Guidelines, SEBF8162, "Measuring Procedures and Salvage Procedures for Cylinder Head Assemblies and Related Components"Reference: Reuse And Salvage Guidelines, SEBF9006, "Specifications for Cylinder Head Assemblies on C-Series Engines"Inspection
All of the heads shown that in the photos have been milled to near minimum thickness to remove as much damage as possible. The damage that remains is inside the gasket sealing area. This area is shown by the black circle drawn on the head.Heads with damage in the fire ring seat area after machining should not be used again.Identification Stamp and Nomenclature
Cylinder heads that are reworked by the criteria in this guideline should be stamped with a dealer-selected stamp in area (1) shown in Illustration 3. This stamp will identify the cylinder heads as having injector tip damage and not casting porosity. Caterpillar Reman heads will be stamped with a 6 mm (0.24 in) upper case "M".
Illustration 3 g02350554
(1) Reworked C9 cylinder heads have identification stamp in this area.
Illustration 4 g02350580
(2)