30903-1470 Tohatsu NEEDLE VALVE

Introduction
Table 1
Revision Summary of Changes in SEBF8422
16–17 Added new serial number prefixes for New Product Introduction (NPI). © 2020 Caterpillar® All Rights Reserved. This guideline is for the use of Cat dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law.Information contained in this document is considered Caterpillar: Confidential Yellow.This Reuse and Salvage Guideline contains the necessary information to allow a dealer to establish a parts reusability program. Reuse and salvage information enables Caterpillar dealers and customers to benefit from cost reductions. Every effort has been made to provide the most current information that is known to Caterpillar. Continuing improvement and advancement of product design might have caused changes to your product which are not included in this publication. This Reuse and Salvage Guideline must be used with the latest technical information that is available from Caterpillar.For technical questions when using this document, work with your Dealer Technical Communicator (TC).To report suspected errors, inaccuracies, or suggestions regarding the document, submit a form for feedback in the Service Information System (SIS Web) interface.Canceled Part Numbers and Replaced Part Numbers
This document may include canceled part numbers and replaced part numbers. Use NPR on SIS for information about canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.Important Safety Information
Illustration 1 g02139237Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly. Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If a tool, a procedure, a work method, or operating technique that is not recommended by Caterpillar is used, ensure that it is safe for you and for other people to use. Ensure that the product will not be damaged or the product will not be made unsafe by the operation, lubrication, maintenance, or the repair procedures that are used.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, warning, 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, you must 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 contains information which helps to determine the reusability of aftercoolers. The guideline also contains suggestions to salvage aftercoolers that have minimal damage and also gives suggestions to help to prevent future failure.Never install an aftercooler that this guideline shows should not be used again. When the parts are used in the same application, parts that meet the "Use Again" specifications in this guideline can be expected to give normal operations until the next overhaul of the engine. During reconditioning, correct any conditions that might have caused the original failure.Service Letters and Technical Information Bulletins
The most recent Service Letters and Technical Information Bulletins that are related to this component shall be reviewed before beginning work. Often Service Letters and Technical Information Bulletins contain upgrades in repair procedures, parts, and safety information that pertain to the parts or components being repaired.
Replacement Parts
Consult the applicable Parts Identification manual for your engine.Nomenclature
Illustration 3 g02001123
Side View of Aftercooler
(1) Inlet and Outlet Connectors
(2) O-Ring Grooves
(3) Drain Connector
Illustration 4 g02001235
Top View of Aftercooler
(4) Flange
(5) FinsVisual Inspection
You should clean all inlet, outlet, and drain connectors thoroughly before inspection.When the severity of pitting cannot be determined, perform a pressure test on the connectors. Install the seals and connect the aftercooler so that 345 kPa (50 psi) pressure can be