Thermal Spray Procedures for OHT and WTS Front Wheel - Bearing Bores {0679, 4006, 4201} Caterpillar


Thermal Spray Procedures for OHT and WTS Front Wheel - Bearing Bores {0679, 4006, 4201}

Usage:

769C 01X
Off-Highway Truck/Tractor
All
Wheel Tractor-Scraper
All

Introduction

Table 1
Revision  Summary of Changes in SEBF2170 
04  Added 5 part numbers. 
03  Added 1 part number. 
02  Changed supplier name from Sulzer Metco to Oerlikon Metco. 

© 2017 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.

For further information on the equipment needed to perform thermal spray processes, refer to the following publications:

  • Special Instruction, SEBF9236, "Fundamentals of High Velocity Oxygen Fuel (HVOF) Spray for Reconditioning Components"

  • Special Instruction, SEBF9238, "Fundamentals of Arc Spray for Reconditioning Components"

  • Special Instruction, SEBF9240, "Fundamentals of Flame Spray for Reconditioning Components"

Canceled Part Numbers and Replaced Part Numbers

This document may not 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 1g02139237

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.

------ WARNING! ------

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 2g03089578

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, or the 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.

Part Description

Table 2
Base Metal  Ductile iron or 1036 Steel casting 
Hardness  28-34 Rc 

Arc Spray Equipment and Procedure

Table 3
Maximum Surface Finish  1.6 Micrometer (63.00 Microinch) 
Reason for Spraying  Wear or grooving 
Mating Part Contact Area & Material  Bearing 
Arc Spray Equipment Type  SmartArc by Oerlikon Metco,TAFA 8830 MHU, or 8835 MHU 
Wire  TAFA 30T Wire Top Coat, TAFA 75B Bond Coat 
Finish Thickness  As Required 
Spray Angle  90° 
Substrate Pre-Heat Temperature  66° C (150° F) Do not direct arc on area to be sprayed 
Substrate Temperature During Spraying Not to Exceed  148° C (300° F) 
Auxiliary Cooling  Filtered shop air 
Rotation/Traverse Device  Lathe 
Rotation Speed  92.0 SMPM (300.00 SFPM) 
Surface Preparation Method  Undercut and Grit blast 
Equipment Required  Turn (Horizontal or Vertical) Lathe 
Recommended Cutting Tool  ISCAR DNMG 432TFIC507 
Blast Media Recommendation  Pressure Type Only (Aluminum Oxide Grit) 

Table 4
Arc Spray  Procedure  Check List 
Clean Part  Degrease in hot caustic solution   
Undercut  To "tru-up" surface   
Chamfer  If required - 1.0 mm (0.039 inch) x 45°   
Remove Oxide  Use fiber flap brush or Clean/strip disc   
Clean Spray Area  Commercial degreaser   
Mask for Grit Blaster  Duct Tape   
Grit Blast Equipment  Pressure type only   
Grit Type and Size  20 mesh aluminum oxide   
Blast Air Pressure  690 kPa (100.0 psi)   
Blast Nozzle to Work Distance  51 mm to 150 mm (2.0 inch to 6.0 inch)   
Remove Blast Mask  Make sure that surface is clean   
Mask for Metal Spray  Antibond or Blue Layout Dye   
Metal Spray Equipment Type  Smart Arc by Oerlikon Metco  TAFA   
  Consumable (Bondcoat)  TAFA 75B  TAFA 75B   
  Clamp Pressure  275 kPa (40 psi)     
  Air Jets/Pressure  415 kPa (60 psi)  415 kPa (60 psi)   
  Arc Load Volts  30V  30V   
  Amps  125 Amps  150 Amps   
  Gun to Work Distance (Standoff)  128 mm (5.0 inch)  128 mm (5.0 inch)   
  Spray Rate/Bond Pass  0.038 mm (0.0015 inch)/pass  0.038 mm (0.0015 inch)/pass   
  Consumable (Topcoat)  TAFA 30T  TAFA 30T   
  Clamp Pressure  275 kPa (40 psi)     
  Air Jets/Pressure  415 kPa (60 psi)  415 kPa (60 psi)   
  Arc Load Volts  31V  31V   
  Amps  150 Amps  175 Amps   
  Gun to Work Distance (Standoff)  166 mm (6.5 inch)  166 mm (6.5 inch)   
  Spray Rate/Build Up  0.058 mm (0.0023 inch)/pass  0.058 mm (0.0023 inch)/pass   
  Rotation Speed of Part (RPM)  RPM varies depending on diameter   
  Rotation Speed of Part  92.0 SMPM (300.00 SFPM)   
  Traverse Rate of Gun  11.0 SMPM (40.00 SFPM)   
Gun Fixturing Method  Machine mount or hand held   
Finishing Equipment  Vertical Lathe or Horizontal Mill   
Part/Cutter Rotation Roughing  50.0 SMPM (150.00 SFPM)   
Part/Cutter Rotation Finishing  75.0 SMPM (250.00 SFPM)   
Coolant  Oil base synthetic - 40:1 ratio   
Traverse Speed  0.30 mm (0.012 inch) per revolution   
Depth of Rough Cut  0.51 mm (0.020 inch) per side max.   
Depth of Finish Cut  0.25 mm (0.010 inch) per side max.   

Flame Spray Equipment and Procedure

Table 5
Maximum Surface Finish  1.6 Micrometer (63.00 Microinch) 
Reason for Spraying  Wear or grooving 
Mating Part Contact Area & Material  Bearing 
Metco Equipment Type  6P-II by Oerlikon Metco 
Metco Material  Metco 453 
Finish Thickness  As Required 
Finishing Allowance  0.51 mm to 0.64 mm (0.020 inch to 0.025 inch) per side 
Spray Angle  90° 
Substrate Pre-Heat Temperature  66° C (150° F) Do not direct flame on area to be sprayed 
Substrate Temperature During Spraying Not to Exceed  148° C (300° F) 
Auxiliary Cooling  Filtered shop air 
Rotation/Traverse Device  Lathe 
Rotation/Traverse Speed  91.4 SMPM (300.00 SFPM) 
Surface Preparation Method  Undercut and Grit Blast 
Finishing Method  Machine 
Machining Equipment Type  Lathe or Turntable 
Recommended Cutter Grade  C-2, 883 Carboloy or equivalent 

Table 6
Flame Spray Process (6P)  Procedure  Check List 
Clean Part  Degrease in hot caustic solution   
Undercut  To "tru-up" surface   
Chamfer  If required - 1.0 mm (0.039 inch) x 45°   
Remove Oxide  Use fiber flap brush or Clean/strip disc   
Clean Spray Area  Metco cleaning solvent or equivalent   
Mask for Blast  Duct Tape   
Blast Equipment  Pressure type only   
Grit Type and Size  Aluminum Oxide 24 mesh   
Blast Air Pressure  690 kPa (100.0 psi)   
Blast Nozzle to Work Distance  51 mm to 150 mm (2.0 inch to 6.0 inch)   
Remove Blast Mask  Remove mask, make sure that surface is clean   
Mask for Spray  Metco Antibond or Blue Layout Dye   
Spray Equipment Type  6P-II Hand Held Thermo Spray System by Oerlikon Metco   
Auxiliary Cooling  If desired   
Nozzle  6P-C7A-K "K" Nozzle   
Air Capacity/Pressure  6P-3/Cooling Air 140 - 170 kPa (20.0 - 25.0 psi)   
Oxygen Pressure  210 kPa (30.0 psi)   
Oxygen Flow  1190 L/h (42.0 cfh)   
Fuel Gas Pressure  100 kPa (15.0 psi)   
Fuel Gas Flow  1415 L/h (50.0 cfh)   
Carrier Gas Pressure  380 kPa (55.0 psi)   
Carrier Gas Flow  1050 L/h (37.0 cfh)   
Spray Rate/Build Up  5.5 kg (12.00 lb) per hour or 90 gram (3.2 ounce) per min   
Gun to Work Distance  230 mm (9.0 inch)   
Rotation Speed Of Part (RPM)  RPM varies depending on diameter   
Rotation Speed Of Part (SFPM)  91.4 SMPM (300.00 SFPM)   
Traverse Rate of Gun (SFPM)  15.24 SMPM (50.000 SFPM)   
Gun Fixturing Method  Machine mount or hand held   
Top Coat/Thickness  0.10 mm to 0.15 mm (0.004 inch to 0.006 inch) per pass   
Finishing Equipment  Lathe   
Part/Cutter Rotation (SFPM)  91.4 SMPM (300.00 SFPM)   
Traverse Speed  0.05 mm to 0.10 mm (0.002 inch to 0.004 inch) per revolution   
Depth of Rough Cut  0.38 mm to 0.51 mm (0.015 inch to 0.020 inch) per side   
Depth of Finish Cut  0.25 mm to 0.38 mm (0.010 inch to 0.015 inch) per side   
Additional Finish Method  Emery cloth for desired finish   

Specifications



Illustration 3g03089600

Table 7
OHT Front Wheel - Bearing Bores 
Part No.  Dimension A  Dimension B 
106-7888  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  380.936 ± 0.038 mm (14.9975 ± 0.0015 inch) 
125-5938  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  447.611 ± 0.038 mm (17.6225 ± 0.0015 inch) 
138-9312  268.237 ± 0.038 mm (10.5605 ± 0.0015 inch)  299.913 ± 0.038 mm (11.8076 ± 0.0015 inch) 
144-0803  507.796 ± 0.038 mm (19.9920 ± 0.0015 inch)  590.322 ± 0.038 mm (23.2410 ± 0.0015 inch) 
265-3191  422.135 ± 0.038 mm (16.6194 ± 0.0015 inch)  507.860 ± 0.038 mm (19.9944 ± 0.0015 inch) 
271-3761  206.324 ± 0.038 mm (8.1230 ± 0.0015 inch)  228.549 ± 0.038 mm (8.9980 ± 0.0015 inch) 
2G-9174  215.849 ± 0.038 mm (8.4980 ± 0.0015 inch)  253.949 ± 0.038 mm (9.9980 ± 0.0015 inch) 
303-9576  215.849 ± 0.038 mm (8.4980 ± 0.002 inch)  253.949 ± 0.038 mm (9.9980 ± 0.002 inch) 
303-9577  268.237 ± 0.038 mm (10.5605 ± 0.002 inch)  299.913 ± 0.038 mm (11.8076 ± 0.002 inch) 
303-9578  268.237 ± 0.038 mm (10.5605 ± 0.002 inch)  299.913 ± 0.038 mm (11.8076 ± 0.002 inch) 
308-3212  268.237 ± 0.038 mm (10.5605 ± 0.002 inch)  299.913 ± 0.038 mm (11.8076 ± 0.002 inch) 
5T-5371  268.237 ± 0.038 mm (10.5605 ± 0.0015 inch)  299.913 ± 0.038 mm (11.8076 ± 0.0015 inch) 
5T-6061  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  380.936 ± 0.038 mm (14.9975 ± 0.0015 inch) 
6D-0194  206.324 ± 0.038 mm (8.1230 ± 0.0015 inch)  228.549 ± 0.038 mm (8.9980 ± 0.0015 inch) 
6D-0408  164.922 ± 0.038 mm (6.4930 ± 0.0015 inch)  234.899 ± 0.038 mm (9.2480 ± 0.0015 inch) 
6D-1459  206.324 ± 0.038 mm (8.1230 ± 0.0015 inch)  228.549 ± 0.038 mm (8.9980 ± 0.0015 inch) 
6G-6438  215.849 ± 0.038 mm (8.4980 ± 0.0015 inch)  253.949 ± 0.038 mm (9.9980 ± 0.0015 inch) 
6G-6439  206.324 ± 0.038 mm (8.1230 ± 0.0015 inch)  228.549 ± 0.038 mm (8.9980 ± 0.0015 inch) 
7D-2833  215.849 ± 0.038 mm (8.4980 ± 0.0015 inch)  253.949 ± 0.038 mm (9.9980 ± 0.0015 inch) 
8W-3700  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  380.936 ± 0.038 mm (14.9975 ± 0.0015 inch) 
8X-1469  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  447.611 ± 0.038 mm (17.6225 ± 0.0015 inch) 
8X-2634  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  380.936 ± 0.038 mm (14.9975 ± 0.0015 inch) 
8X-2637  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  380.936 ± 0.038 mm (14.9975 ± 0.0015 inch) 
8X-8456  358.716 ± 0.033 mm (14.1227 ± 0.0013 inch)  380.936 ± 0.038 mm (14.9975 ± 0.0015 inch) 
9D-1839  253.949 ± 0.038 mm (9.9980 ± 0.0015 inch)  299.913 ± 0.038 mm (11.8076 ± 0.0015 inch) 

Table 8
WTS Front Wheel - Bearing Bores 
Part No.  Dimension A  Dimension B 
110-7923  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch)  317.420 ± 0.050 mm (12.4969 ± 0.0020 inch) 
153-6458  190.423 ± 0.025 mm (7.4970 ± 0.0010 inch)  193.598 ± 0.025 mm (7.6220 ± 0.0010 inch) 
1V-1687  180.912 ± 0.035 mm (7.1225 ± 0.0014 inch)  193.612 ± 0.035 mm (7.6225 ± 0.0014 inch) 
270-0491  161.912 ± 0.013 mm (6.3745 ± 0.0005 inch)  133.312 ± 0.013 mm (5.2485 ± 0.0005 inch) 
2G-9056  259.892 ± 0.051 mm (10.2320 ± 0.0020 inch)  239.903 ± 0.051 mm (9.4450 ± 0.0020 inch) 
2G-9059 
2T-1949  161.912 ± 0.013 mm (6.3745 ± 0.0005 inch)  133.312 ± 0.013 mm (5.2485 ± 0.0005 inch) 
388-1524  292.05 ± 0.04 mm (11.4980 ± 0.002 inch)  292.05 ± 0.04 mm (11.4980 ± 0.002 inch) 
4D-4569  346.000 ± 0.038 mm (13.6221 ± 0.0015 inch)  346.000 ± 0.038 mm (13.6221 ± 0.0015 inch) 
4D-7612  314.274 ± 0.038 mm (12.3730 ± 0.0015 inch)  282.524 ± 0.038 mm (11.1230 ± 0.0015 inch) 
4J-0875 
5D-5456  266.649 ± 0.038 mm (10.4980 ± 0.0015 inch)  247.599 ± 0.038 mm (9.7480 ± 0.0015 inch) 
6G-1315  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch)  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch) 
6G-1317 
6G-1804  292.036 ± 0.038 mm (11.4975 ± 0.0015 inch)  292.036 ± 0.050 mm (11.4975 ± 0.0020 inch) 
6G-4690  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch)  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch) 
8D-2088  259.913 ± 0.038 mm (10.2328 ± 0.0015 inch)  239.918 ± 0.038 mm (9.4456 ± 0.0015 inch) 
8D-2228  314.244 ± 0.050 mm (12.3718 ± 0.0020 inch)  282.494 ± 0.050 mm (11.1218 ± 0.0020 inch) 
8D-2231  314.274 ± 0.038 mm (12.3730 ± 0.0015 inch)  282.524 ± 0.038 mm (11.1230 ± 0.0015 inch) 
8D-2264  292.036 ± 0.038 mm (11.4975 ± 0.0015 inch)  292.036 ± 0.050 mm (11.4975 ± 0.0020 inch) 
8D-8536  259.913 ± 0.038 mm (10.2328 ± 0.0015 inch)  239.918 ± 0.038 mm (9.4456 ± 0.0015 inch) 
8R-4087  190.436 ± 0.035 mm (7.4980 ± 0.0014 inch)  193.612 ± 0.035 mm (7.6225 ± 0.0014 inch) 
8V-6398 
8W-9333  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch)  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch) 
8W-9804  259.890 ± 0.050 mm (10.2319 ± 0.0020 inch)  239.900 ± 0.050 mm (9.4449 ± 0.0020 inch) 
8W-9812 
8W-9955 
8X-0402  346.000 ± 0.050 mm (13.6221 ± 0.0020 inch)  317.420 ± 0.050 mm (12.4969 ± 0.0020 inch) 
9D-0115  314.244 ± 0.050 mm (12.3718 ± 0.0020 inch)  292.019 ± 0.050 mm (11.4968 ± 0.0020 inch) 
337-0795  259.89 ± 0.05 mm (10.2319 ± 0.002 inch)  239.9 ± 0.05 mm (9.4449 ± 0.002 inch) 

Caterpillar Information System:

3516C Generator Set Engines Temperature Sensor (DEF)
3512C and 3516C Marine Auxiliary Engines Data Link - Test
2012/03/26 New Software Is Used on Certain C18 Industrial Engines {1901, 1920}
Thermal Spray Procedures for OHT Front Spindles {0679, 4006, 4205} Thermal Spray Procedures for OHT Front Spindles {0679, 4006, 4205}
Thermal Spray Procedures for OHT and WTS Rear Wheel - Bearing Bores {0679, 4201} Thermal Spray Procedures for OHT and WTS Rear Wheel - Bearing Bores {0679, 4201}
Thermal Spray Procedures for OHT Rear Spindles {0599, 0679, 4006, 4205} Thermal Spray Procedures for OHT Rear Spindles {0599, 0679, 4006, 4205}
Thermal Spray Procedures for Engine Front Cover{0679, 1150, 1151, 1162} Thermal Spray Procedures for Engine Front Cover{0679, 1150, 1151, 1162}
Thermal Spray Procedures for Transmission and Torque Converter Yokes {0599, 0679, 3001, 3030, 3101, 3160} Thermal Spray Procedures for Transmission and Torque Converter Yokes {0599, 0679, 3001, 3030, 3101, 3160}
Thermal Spray Procedures for Wheel Loader Spindle (OD) {3259, 4205, 4215} Thermal Spray Procedures for Wheel Loader Spindle (OD) {3259, 4205, 4215}
Thermal Spray Procedures for Wheel Loader - Wheel Bearing ID Bore {0679, 4201, 4215} Thermal Spray Procedures for Wheel Loader - Wheel Bearing ID Bore {0679, 4201, 4215}
Thermal Spray Procedures for Wheel Loaders, Articulated Trucks, Wheel Tractors, Compactors, and Integrated Toolcarriers Differential Case - Flange End {0679, 3258, 3284} Thermal Spray Procedures for Wheel Loaders, Articulated Trucks, Wheel Tractors, Compactors, and Integrated Toolcarriers Differential Case - Flange End {0679, 3258, 3284}
Thermal Spray Procedures for Differential Case - Housing Face & Pinion Thrust Face {3283} Thermal Spray Procedures for Differential Case - Housing Face & Pinion Thrust Face {3283}
Thermal Spray Procedures for OHT Differential Housing - Housing and Side Thrust {0374, 0599, 0679, 3258, 3281} Thermal Spray Procedures for OHT Differential Housing - Housing and Side Thrust {0374, 0599, 0679, 3258, 3281}
Thermal Spray Procedures for OHT Differential Carrier Assembly {0374, 0599, 0679, 3258, 3281, 3284} Thermal Spray Procedures for OHT Differential Carrier Assembly {0374, 0599, 0679, 3258, 3281, 3284}
Thermal Spray Procedures for 3500 Engine - Flywheel Housing {0679, 1157} Thermal Spray Procedures for 3500 Engine - Flywheel Housing {0679, 1157}
Thermal Spray Procedures for 772 - 797F OHT Brake Anchor {0374, 0599, 0679, 4251, 4267} Thermal Spray Procedures for 772 - 797F OHT Brake Anchor {0374, 0599, 0679, 4251, 4267}
3512C and 3516C Marine Engines Piston and Rings
3512C and 3516C Marine Engines Piston and Rings
336E Excavator Machine System Specifications Final Drive and Motor Fastener (Mounting)
Instruction for Installing 3E-8866 Wire As to Fit Alternate Harness Lengths{1408, 1900, 1901} Instruction for Installing 3E-8866 Wire As to Fit Alternate Harness Lengths{1408, 1900, 1901}
SPF343 and SPF343C Trailer Mounted Pumpers Driven Equipment - Check
2012/09/26 New Exhaust Shields and Seals Are Available for Certain On-Highway Truck Engines {1059, 1067}
CX48-P2300 Petroleum Transmission Transmission Planetary - Assemble
SPF343 and SPF343C Trailer Mounted Pumpers Control Panel - Control Panels for the Pumper
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.