Reusability Inspection of Seal Ring and Stator Carrier Assemblies for Certain Models {0760, 0761, 3101, 3129, 3160, 7555} Caterpillar

Articulated Truck

735 (S/N: WWC1-UP; B1N1-UP)

735B (S/N: L4D1-UP; T4P1-UP; E4R1-UP)

740 (S/N: WWD1-UP; AXM1-UP; B1P1-UP; DTX1-UP)

740 EJECTOR (S/N: B1R1-UP)

740B (S/N: L4E1-UP; GLH1-UP; T4R1-UP; E4S1-UP)

740B EJECTOR (S/N: L4F1-UP; T4S1-UP)

D20D (S/N: 9MG1-UP)

D250D (S/N: 6NG1-UP)

D250E (S/N: 5TN1-UP)

D250E Series II (S/N: 4PS1-UP)

D300E (S/N: 7FN1-UP)

D300E Series II (S/N: 5KS1-UP)

D35-HP (S/N: 3FD1-UP)

D350E (S/N: 9LR1-UP)

D350E Series II (S/N: 2XW1-UP)

D400 (S/N: 1MD1-UP)

D400D (S/N: 8TF1-UP)

D400E (S/N: 2YR1-UP)

D400E Series II (S/N: APF1-UP; 8PS1-UP)

D40D (S/N: 2JJ1-UP)

D44 (S/N: 2LD1-UP)

D44B (S/N: 8SD1-UP)

D550 (S/N: 4RD1-UP)

D550B (S/N: 5ND1-UP)

Industrial Engine

C11 INDUSTRIAL (S/N: P891-UP)

C18 INDUSTRIAL (S/N: MMB1-UP)

D342C IND (S/N: 05A1-UP)

Landfill Compactor

826C (S/N: 87X1-UP)

826G (S/N: 7LN1-UP)

826G Series II (S/N: AYH1-UP)

826H (S/N: AWF1-UP)

826K (S/N: 2321-UP; 2L31-UP; 2T61-UP; SET1-UP)

836 (S/N: 3RL1-UP; 7FR1-UP)

836G (S/N: BRL1-UP; 7MZ1-UP)

836H (S/N: BXD1-UP)

836K (S/N: T6X1-UP; L6Z1-UP; LWZ1-UP; TWZ1-UP)

Load Haul Dump

R2900 (S/N: 5TW1-UP)

R2900G (S/N: GLK1-UP; JLK1-UP; NLK1-UP)

R3000H (S/N: RCM1-UP; RCY1-UP)

R3200G (S/N: MAZ1-UP)

Motor Grader

24H (S/N: 7KK1-UP)

24M (S/N: B931-UP; B9K1-UP)

Off-Highway Truck/Tractor

69D (S/N: 9SS1-UP; 9XS1-UP)

73D (S/N: 1GW1-UP)

768C (S/N: 02X1-UP)

769C (S/N: 01X1-UP)

769D (S/N: BBB1-UP; 5TR1-UP; 5SS1-UP)

770 (S/N: M7W1-UP)

770G (S/N: RMA1-UP; TWA1-UP; RMD1-UP; KDH1-UP; ECM1-UP; ECX1-UP)

772 (S/N: J2M1-UP; 10S1-UP)

772B (S/N: 64W1-UP)

772G (S/N: TWB1-UP; RME1-UP; RMH1-UP; LTS1-UP; KEX1-UP; LTX1-UP)

773B (S/N: 5SC1-UP; 63W1-UP)

773D (S/N: NBJ1-UP; BGL1-UP; 7ER1-UP; 7CS1-UP)

773E (S/N: BDA1-UP; PRB1-UP; KEG1-UP; ASK1-UP; DJS1-UP)

773F (S/N: EXD1-UP)

776 (S/N: 14H1-UP; 14W1-UP)

776B (S/N: 6JC1-UP)

776C (S/N: 2TK1-UP)

776D (S/N: 5ER1-UP; AFS1-UP)

777 (S/N: 84A1-UP)

777B (S/N: 4YC1-UP; 3NF1-UP)

777C (S/N: 4XJ1-UP)

777D (S/N: AGC1-UP; FKR1-UP; 3PR1-UP; 2YW1-UP; AGY1-UP)

777E (S/N: KDP1-UP; KDZ1-UP)

777F (S/N: WTK1-UP)

777G (S/N: GT71-UP; T5A1-UP; TNM1-UP; RDR1-UP; T4Y1-UP)

784B (S/N: 5RK1-UP)

784C (S/N: 2PZ1-UP)

785 (S/N: 8GB1-UP)

785B (S/N: 6HK1-UP)

785C (S/N: 1HW1-UP; APX1-UP; 5AZ1-UP)

785D (S/N: DMC1-UP; MSY1-UP)

785G (S/N: SH21-UP)

786 (S/N: 80A1-UP; 81A1-UP)

789 (S/N: 9ZC1-UP)

789B (S/N: 7EK1-UP)

789C (S/N: 2BW1-UP)

789D (S/N: SP21-UP; SPD1-UP; SHH1-UP; TWP1-UP)

789G (S/N: TR21-UP)

793 (S/N: 3SJ1-UP)

793B (S/N: 1HL1-UP)

793C (S/N: CBR1-UP; ATY1-UP; 4GZ1-UP)

793D (S/N: FDB1-UP)

793F (S/N: SND1-UP; SSP1-UP; SXP1-UP; RBT1-UP)

OEM POWERTRAIN (S/N: DTE1-UP)

Petroleum Power Train Package

CX48-P2300-3512 (S/N: PFX1-UP)

TH48-E70-C27I (S/N: PKZ1-UP)

TH48-E70-C32I (S/N: PKY1-UP)

TH48-E70-C32P (S/N: PKG1-UP)

TH48-E80-3512BP (S/N: PLL1-UP)

TH48-E80-3512CP (S/N: PLY1-UP; PLZ1-UP)

TH55-E70-3512CP (S/N: PNY1-UP; PNZ1-UP)

Petroleum Transmission

CX48-P2300 (S/N: GDH1-UP)

TH48-E70 (S/N: JGC1-UP; KSH1-UP)

TH48-E80 (S/N: FRT1-UP)

Power Train

C18 TR43M44 OEM PKG (S/N: HTX1-UP)

Pumper

SPF343 (S/N: 6RZ1-UP)

Quarry Truck

771C (S/N: 3BJ1-UP)

771D (S/N: BCA1-UP; 6JR1-UP; 6YS1-UP)

773G (S/N: G731-UP; G771-UP; MWH1-UP; JWS1-UP; T5S1-UP; T5T1-UP)

775B (S/N: 7XJ1-UP)

775D (S/N: 6KR1-UP; 8AS1-UP)

775E (S/N: BEC1-UP)

775F (S/N: EYG1-UP)

775G (S/N: T5F1-UP; RFM1-UP; MJS1-UP; T5W1-UP)

Soil Compactor

825C (S/N: 86X1-UP)

825G (S/N: 6RN1-UP)

825G Series II (S/N: AXB1-UP)

825H (S/N: AZW1-UP)

825K (S/N: 2331-UP; 2L91-UP; 2T91-UP; SEE1-UP)

Track-Type Loader

983B (S/N: 58X1-UP)

Track-Type Tractor

D11N (S/N: 4HK1-UP; 74Z1-UP)

D11R (S/N: AAF1-UP; 8ZR1-UP; 9TR1-UP; 9XR1-UP)

D11T (S/N: TPB1-UP)

D5H (S/N: 7NC1-UP; 1YD1-UP; 2SD1-UP)

D6D (S/N: 04X1-UP)

D6R (S/N: 2HM1-UP; 4FM1-UP; 8TM1-UP; 9BM1-UP; 2YN1-UP; 4HN1-UP; 5LN1-UP; 6JN1-UP; 7KN1-UP; 8LN1-UP; 8XN1-UP; 9MN1-UP; 9PN1-UP; DMP1-UP; 4JR1-UP; 4TR1-UP; 4WR1-UP; 5PR1-UP; 5RR1-UP; 6FR1-UP; 6GR1-UP; 6HR1-UP; 6MR1-UP; 7AR1-UP; 7DR1-UP; 7GR1-UP; 9ZS1-UP)

Transmission

TH55 - KRESS (S/N: KCH1-UP)

TH55FT-E70 (S/N: PCJ1-UP)

TH55FT-E90 (S/N: THE1-UP)

Underground Articulated Truck

AD30 (S/N: CXR1-UP; DXR1-UP; GXR1-UP)

AD40 Series II (S/N: 1YZ1-UP)

AD45 (S/N: BKZ1-UP)

AD45B (S/N: CXM1-UP; GXM1-UP)

AD55 (S/N: ANW1-UP; DNW1-UP; GNW1-UP)

AD55B (S/N: JNW1-UP)

AD60 (S/N: KNW1-UP; NNW1-UP)

AE40 Series II (S/N: BLW1-UP; 1ZZ1-UP)

Wheel Dozer

824C (S/N: 85X1-UP)

824G (S/N: 4SN1-UP)

824G Series II (S/N: AWW1-UP)

824H (S/N: ASX1-UP)

824K (S/N: 2T21-UP; 2L41-UP; 2341-UP; RWB1-UP)

834B (S/N: 7BR1-UP; 92Z1-UP)

834G (S/N: BPC1-UP; 6GZ1-UP)

834H (S/N: BTX1-UP)

834K (S/N: TW41-UP; L4Y1-UP; LWY1-UP; TWY1-UP)

Wheel Loader

980C (S/N: 13B1-UP; 2XD1-UP; 63X1-UP)

980F (S/N: 8CJ1-UP; 3HK1-UP)

980F Series II (S/N: 5XJ1-UP; 4RN1-UP; 8JN1-UP)

980G (S/N: 9CM1-UP; 2KR1-UP; 2SR1-UP)

980G Series II (S/N: AXG1-UP; AWH1-UP; AYT1-UP)

980H (S/N: PF81-UP; P8B1-UP; MHG1-UP; A8J1-UP; KZL1-UP; JMS1-UP)

980H Series 2 (S/N: MKP1-UP)

980K (S/N: W7K1-UP; NEP1-UP; GTZ1-UP)

980L (S/N: D8Z1-UP)

980M (S/N: MK21-UP; WW31-UP; MGD1-UP; XDJ1-UP; KRS1-UP; N8T1-UP)

982M (S/N: MK61-UP; F9A1-UP; WMD1-UP; XDL1-UP; LRS1-UP; K1Y1-UP)

986H (S/N: 9861-UP; L8S1-UP)

986K (S/N: MH81-UP; NL81-UP; SWH1-UP)

988 (S/N: 87A1-UP)

988B (S/N: 50W1-UP; 62Y1-UP)

988F (S/N: 8YG1-UP)

988F Series II (S/N: 2ZR1-UP)

988G (S/N: BNH1-UP; 2TW1-UP)

988G Series RTCH (S/N: 1NZ1-UP)

988H (S/N: A7A1-UP; BXY1-UP)

988K (S/N: T8E1-UP; L8X1-UP; LWX1-UP; TWX1-UP)

992C (S/N: 42X1-UP; 49Z1-UP)

992D (S/N: 7MJ1-UP)

994 (S/N: 9YF1-UP)

994D (S/N: 3TZ1-UP)

994F (S/N: 4421-UP)

994G (S/N: 8FR1-UP)

994H (S/N: DWC1-UP)

994K (S/N: MM91-UP; MRK1-UP; SMX1-UP)

Wheel Tractor-Scraper

621 (S/N: 2DB1-UP; 37G1-UP; 23H1-UP)

621B (S/N: 2GB1-UP; 6XB1-UP; 7KC1-UP; 8HC1-UP; 9AC1-UP; 45P1-UP; 35V1-UP)

621E (S/N: 6AB1-UP; 6BB1-UP; 2PD1-UP; 2TF1-UP)

621F (S/N: 4SK1-UP; 8PL1-UP)

621G (S/N: DBB1-UP; DXB1-UP; MSE1-UP; KLK1-UP; NEL1-UP; CEN1-UP; ALP1-UP; CEP1-UP; KJW1-UP; DBX1-UP; MEX1-UP)

621H (S/N: DBK1-UP; HKK1-UP; NYY1-UP; EAZ1-UP)

621K (S/N: WTA1-UP; WTE1-UP; WTL1-UP; WTP1-UP)

621R (S/N: 12Y1-UP)

621S (S/N: 8KD1-UP)

623 (S/N: 26U1-UP; 52U1-UP)

623B (S/N: 46P1-UP)

623E (S/N: 6CB1-UP; 6DB1-UP; 6YF1-UP)

623F (S/N: 6BK1-UP; 5EW1-UP)

623G (S/N: CES1-UP; ARW1-UP; CEW1-UP)

623H (S/N: EJD1-UP; DBF1-UP)

623K (S/N: WTB1-UP; WTM1-UP)

627 (S/N: 50K1-UP; 54K1-UP; 68M1-UP; 69M1-UP)

627B (S/N: 2WC1-UP; 14S1-UP; 15S1-UP; 37V1-UP; 38V1-UP)

627E (S/N: 6EB1-UP; 6FB1-UP; 6GB1-UP; 6HB1-UP; 7CG1-UP; 3WJ1-UP)

627F (S/N: 4YK1-UP; 1DL1-UP)

627G (S/N: DBD1-UP; AXF1-UP; AYK1-UP; CEX1-UP; CEZ1-UP; DBZ1-UP)

627H (S/N: LCT1-UP; DBW1-UP)

627K (S/N: WTC1-UP; WTN1-UP)

631C (S/N: 67M1-UP)

631D (S/N: 24W1-UP)

631E Series II (S/N: 1NB1-UP)

631G (S/N: DFA1-UP; AWK1-UP; CLR1-UP; CMT1-UP; M1W1-UP)

631K (S/N: WT41-UP; WT61-UP; WTR1-UP; WTW1-UP)

633C (S/N: 66M1-UP)

633D (S/N: 25W1-UP)

633E Series II (S/N: 2PS1-UP)

637 (S/N: 64M1-UP; 65M1-1; 91N1-UP; 92N1-UP; 79P1-UP)

637B (S/N: 26R1-UP)

637D (S/N: 4JB1-UP; 20W1-UP; 21W1-UP; 22W1-UP; 23W1-UP; 26W1-UP; 27W1-UP)

637E (S/N: 1JB1-UP; 1LB1-UP)

637G (S/N: AWE1-UP; CEH1-UP; CEJ1-UP; DFJ1-UP; CEM1-UP; AYN1-UP; AXT1-UP; DEX1-UP; DEY1-UP)

637K (S/N: WTS1-UP; WTT1-UP; WTX1-UP; WTY1-UP)

639D (S/N: 88X1-UP; 99X1-UP)

641 (S/N: 80F1-UP; 42M1-UP; 43M1-UP)

641B (S/N: 65K1-UP)

651 (S/N: 23G1-UP)

651B (S/N: 67K1-UP; 45M1-UP)

651E (S/N: 4YR1-UP; 5XR1-UP; 89Z1-UP)

657 (S/N: 19G1-UP)

657B (S/N: 47M1-UP)

657E (S/N: 6MB1-UP; 5YR1-UP; 6PR1-UP; 6TR1-UP; 7KR1-UP; 86Z1-UP; 87Z1-UP; 90Z1-UP; 91Z1-UP)

657G (S/N: W1B1-UP; W1C1-UP; W1E1-UP; W1F1-UP; A4G1-UP; DXG1-UP; GER1-UP; GRS1-UP)

666B (S/N: 66K1-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 the Numerical Part Record (NPR) on the Service Information System Website (SIS Web) for information about canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.

Note: This document can be used for reusability inspection procedures of the ring and stator carrier assemblies, refer to Table 4 for applicable part number.

Important Safety Information

Illustration 1	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”. Refer to Illustration 2 for an example of a “WARNING” Safety Alert Symbol.

Illustration 2	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 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

The ring and stator carrier assemblies used with rotating clutches in the transmissions may be damaged by debris, excessive pressures, high temperatures, or lack of lubrication. These conditions cause excessive heat build-up and wear of the Vespel seal and seal groove, resulting in leakage. The wear is normally on the pressure side of the groove of the number two clutch seal ring.

This guideline provides the procedures necessary to determine the reusability of the ring and stator carrier assemblies. Life will vary depending on application, load, lubrication, and environment.

This guideline contains the latest standards of engineering, which will help minimize owning and operating costs. A part is expected to reach the next Planned Component Rebuild (PCR) if the part meets the specifications within this guideline and the part is intended for a similar application. Use this guideline to determine whether a part should be reused. Do not install a part that is not reusable. During reconditioning, correct any condition that might have caused the original failure.

The dimensions and tolerances provided are to return a part / component to specification. The dimensional information alone is not solely used to condemn a part from reuse. Follow visual inspections and the "Visual Inspection" section for further guidance.

References

Service Advisories, Service Letters, and Technical Service Bulletins

Tooling and Equipment

Note: The Tooling and Equipment in Table 3 is not an all inclusive list of Tooling required to perform every task within this document. Tooling needs may vary for scope of work to be performed for each specific rebuild.

Preparation Recommendations

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Personal injury can result when using cleaner solvents. To help prevent personal injury, follow the instructions and warnings on the cleaner solvent container before using.

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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: Clean exterior of the ring and stator carrier assemblies 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.

• Wash each carrier assembly separately. When several parts are washed together, machined surfaces can be damaged.

• During cleaning, do not damage machined surfaces.

• Use pressurized air to dry the carrier assemblies.

• Put hydraulic oil on all machined surfaces to prevent rust or corrosion if inspection is not done immediately after cleaning. Carefully store the parts in a clean container.

• Note: Application of hydraulic oil to machined surfaces is a good option for short-term storage, if long-term storage is necessary then follow long-term storage guidelines. Refer to SEHS9031Special Instruction, "Storage Procedure for Caterpillar Products".

• Inspect all flange mating surfaces for fretting. Ensure that flange mating surfaces are true and free from raised material resulting from rust, nicks, and dents.

Standardized Parts Marking Procedure

Reference: , SEBF8187Reuse and Salvage Guidelines, "Standardized Parts Marking Procedures".

The code is a Cat standard and is used to record the history of a component. The code will identify the number of rebuilds and hours at the time of each rebuild. This information is important and should be considered for any decision to reuse a component.

Ensure that the mark is not covered by a mating part or on any critical location. Use a metal marking pen to mark the code onto the component.

Illustration 3	g06124077
DO NOT use numbering stamp punches to mark internal components.

The procedure for marking components is a Cat standard. This code is helpful when the machine is sold into a different territory after the first rebuild. During an overhaul, the previous code of a part should never be removed.

Example 1

Illustration 4	g06274624
Example of 1T-1832 stator carrier.

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

Example 2

Illustration 5	g06274630
Example of 140-7075 ring carrier.

Illustration 5 shows code (1-12) and code (2-10). Code (2-10) represents the information from the second rebuild. The first number (2) indicates that the gear had been rebuilt twice. The second number (10) indicates that 10,000 hours accumulated on the gear between the first and second rebuild.

Note: Add the first and second rebuild hours to obtain the total number of hours for the gear in Illustration 5. In this example, the gear has a total of 22,000 hours.

Inspections

Visual Inspection

Illustration 6	g06274541
Example of 140-7075 ring carrier critical inspection areas. (A) Sealing Surface in Bore (B) Flange (C) Ring and Seal Grooves

Illustration 7	g06274553
Example of 1T-1832 stator carrier critical inspection areas. (C) Ring and Seal Grooves (D) Spline

Note: Some ring or stator carrier assembly designs have bearing and seal journals that are critical areas that require inspection.

Inspect the ring or stator carrier assembly for defects such as cracking, abrasive wear, adhesive wear, wear steps that are able to be felt with a seal pick, or extreme heat distortion. If the ring or stator carrier assembly is free from defects, OK TO USE PART AGAIN.

Illustration 8	g06308745
Example of 8E-6316 ring carrier. Illustration of the pressure sides (G) and (H) of the grooves on #2 clutch (E) and #3 clutch (F) of a transmission ring carrier. Wear will typically occur on the pressure side of the groove. (E) #2 Clutch (F) #3 Clutch (G) Pressure Side (H) Pressure Side

Illustration 9	g06331376
Example of 8E-6316 ring carrier. Oil supply (K) enters the seal carrier and forces the outer seal rings out against outer seal lands (J) and is where steps will develop. (J) Outer Seal Lands (K) Oil Supply (L) Lube Passage

Illustration 10	g06331346
Example of 8E-6316 ring carrier. Preferred Step Detection Method Example of using a small gauge MIG (Metal Inert Gas) wire to detect a wear step in the pressure side of groove. Typical example of a wear step found on the edge of a seal groove caused by the Vespel seal. If a wear step is found, DO NOT USE PART AGAIN.

Illustration 11	g06331397
Typical example of a ring carrier that has gotten hot, DO NOT USE PART AGAIN. Note: Close-up illustration of heat marks (M) is after rings were removed. (M) Heat Marks

Illustration 12	g06331257
Example of 8E-9296 carrier assembly. Alternative Step Detection Method Check lands for dings, dents, scoring, or any other damage with a seal pick. Run a seal pick across all defects lightly and if a defect stops the seal pick, then DO NOT USE PART AGAIN.

Illustration 13	g06331258
Example of 8E-9296 carrier assembly. Check grooves for steps, scoring, or any other damage with a seal pick. Run a seal pick across all defects and if a surface discontinuity stops the seal pick, then DO NOT USE PART AGAIN.

Illustration 14	g06331463
Example of 116-5812 stator carrier. Use a surface reconditioning pad to remove oil residue (N). (N) Oil Residue (P) After application of a surface reconditioning pad

Visual Surface Inspection Method Information

Visual Surface Inspection (VT) is a method for testing components for cracks without damaging the component. Refer to Table 5 for advantages and disadvantages and Table 6 for standards and requirements for these NDT methods.

Visual Surface Inspection (VT)

Illustration 15	g06338363
Example of Visual Surface Inspection (VT) Tooling (A) Flashlight (or adequate light source) (B) Magnifying Glass (C) Tape Measure (or other measuring device) (D) Inspection Mirror (E) Seal Pick

Illustration 16	g06085442
Illustration of view through eye piece of a pocket microscope.

If necessary use a microscope with light for enhanced view and to measure the defects. Refer to Tooling Table 3 for the part numbers.

Visual Surface Inspection (VT). VT is often the most cost-effective inspection method and requires little equipment as seen in Illustration 15 or optional 16. Personnel performing VT shall either be trained to a company standard or have sufficient experience and knowledge regarding the components being inspected. Personnel performing VT shall take routine eye exams.