CX38 Transmission Case Inspection Guideline {0374, 0599, 0700, 0717, 0720, 3030, 3064} Caterpillar

Articulated Truck

735C (S/N: LFJ1-UP; TFJ1-UP)

740 EJECTOR (S/N: 3F71-UP; 3T71-UP)

740C EJECTOR (S/N: LFN1-UP; TFN1-UP)

745 (S/N: 3F61-UP; 3T61-UP)

745C (S/N: LFK1-UP; TFK1-UP)

Introduction

© 2018 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.

Summary

Illustration 1	g06081820
(1) 374-4774 Transmission Case

This guideline provides the procedures that are necessary to inspect and determine the reusability of the CX38 Transmission Case. This guideline explains the procedure for inspecting and measuring spline beat in. Never install a part that is shown in this guideline as a part that cannot be used again.

This guideline contains the latest standards of engineering, which will help minimize owning and operating costs.

Important Safety Information

Illustration 2	g02139237

Work 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.

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Improper operation, lubrication, maintenance or repair of this product can be dangerous and could result in injury or death. Do not operate or perform any lubrication, maintenance or repair on this product, until you have read and understood the operation, lubrication, maintenance and repair information.

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 “WARNING” safety alert symbol is shown below.

Illustration 3	g00008666

This 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 "NOTICE" 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 power end 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 power end. Also, determine that the operation, lubrication, maintenance, and repair procedures will not make the power end 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.

Service Letters and Technical Information Bulletins

References

Tooling and Equipment

Table 3 contains the items that are needed to complete the repair procedures in this guideline.

Prepare the Area for Inspection

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Personal injury can result from improper handling of chemicals. Make sure you use all the necessary protective equipment required to do the job. Make sure that you read and understand all directions and hazards described on the labels and material safety data sheet of any chemical that is used. Observe all safety precautions recommended by the chemical manufacturer for handling, storage, and disposal of chemicals.

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Personal injury can result from air pressure. Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing. Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.

Note: Steam clean exterior of well pump prior to disassembly to minimize cross-contamination

• Before you inspect a part, clean the part thoroughly to ensure that all components are free from rust, oil, burrs, and debris prior to inspection. A surface irregularity can hide the indication of an unacceptable defect.

• Use a proper lifting device to provide safety to the operator. Also, use a proper lifting device to prevent damage to the part when you lift the part.

• During cleaning, do not damage machined surfaces.

• Use pressurized air to dry parts.

• If the component cannot be inspected immediately after cleaning, put gear oil on all machined surfaces to prevent rust or corrosion. Carefully store the parts in a clean container.

Standardized Parts Marking

Reference: Refer to Reuse And Salvage Guideline, SEBF8187, "Standardized Parts Marking Procedures" for additional information regarding marking procedures.

Note: Mark the case on a surface that does not wear. This surface should be near the part number. Use metal marking pen for all marking.

The procedure for marking includes a code that will identify the number of rebuilds and the number of hours on each rebuild.

Illustration 4	g06081843
Illustration 4 shows code (1-15). The first number (1) indicates that the component had been rebuilt once. The second number (15) indicates that there were 15,000 hours on the component at the time of rebuild.

Illustration 5	g06081862
Illustration 5 shows code (1-15) and code (2-10). Code (2-10) represents the information from the second rebuild. The first number (2) indicates that the component had been rebuilt twice. The second number (10) indicates that there were 10,000 hours on the component at the time of rebuild.

This coding can be used by all dealers and will help with identification at time of rebuild. Identification can be especially helpful if units that have been rebuilt are sold into different territories. As new overhauls are completed, the previous markings should be left on the part. To obtain the total number of hours for the component in Illustration, 5 add first and second rebuild hours. In this example the component has a total of 22,000 hours.

Spline Wear

Illustration 6	g06081990
Example of spline wear.

Illustration 7	g06081996
Example of spline wear.

Illustration 8	g06082000
Example of spline wear.

Illustration 9	g06082009
Example of spline wear.

Illustration 10	g06082014
Example of spline wear.

Illustration 11	g06082021
Example of spline wear.

Spline Beat In Procedure

Use depth gage on 367-9109 Caliper.

Document according to location guide (BR4 if needed).

Illustration 12	g06081981
Example of spline depth measurement.

Illustration 13	g06082037
Example of spline depth measurement.

Illustration 14	g06082110
Spline locations

DO NOT REUSE CASE if wear is present all around into the inside diameter (ID) of the splines and spline measurements average 0.5 mm (0.02 inch) or greater. Also any case that has any spline with 1.0 mm (0.04 inch) or more of beat in.