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Bienvenido: r080es10
Producto: TRUCK ENGINE
Modelo: C13 TRUCK ENGINE KCB14803
Configuración: C13 On-highway Engine KCB00001-UP
Pautas de reutilización y recuperaciónVisual Inspection of Valves, Valve Springs, and Valve Bridges{1102, 1108, 1109, 1121, 1123}
Número de medio -SEBF8002-22 Fecha de publicación -30/05/2014 Fecha de actualización -02/06/2014
Caterpillar: Confidential Yellow
i05814055
Visual Inspection of Valves, Valve Springs, and Valve Bridges{1102, 1108, 1109, 1121, 1123}
SMCS - 1102; 1108; 1109; 1121; 1123
Engine: 3400 All, 3300 All, 3200 All, 3100 All, 3000 All, and D-series All C-10 All C-9 and C9 All C11 All C12 and C-12 All C13 and C-13 All C15 and C-15 All C16 and C-16 All C175
Engines C18 and C-18 All C27 All C32 All C7 All
Introduction
Table 1
RevisionSummary of Changes in SEBF8002
22 Updated the spring tester in the ""Test Procedure for Valve Springs" " section.
21 Added new serial number prefixes.
20 Included notice in ""Floating Valve Bridges" " section to cease using the 6I-1458
Valve Bridge .
19 Updated Effectivity
18
17 Updated Effectivity
Added ""Important Safety Section" " section.
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16 Cleaned up grammar / sentence structure
15 Updated Effectivity
14
© 2014 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 in order 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 in order 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 questions or additional information concerning this guideline, submit a form for feedback in the Service Information System. In order to address an urgent issue, use the following resources in order to communicate your request to Caterpillar Repair Process Engineering:
• Caterpillar Dealer Technical Communicator
• Dealer Solution Network
• Caterpillar Technical Representative
• Knowledge Network
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
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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 in order 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 specifically recommended by Caterpillar is used, you must ensure that it is safe for you and for other people to use. You should 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.
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.
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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. You must determine that the tools, procedures, work methods, and operating techniques are safe. You must 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 the correct tooling and procedures to measure, clean, and reuse Caterpillar valves, valve springs, and bridges. This guideline references the procedures in Reuse and Salvage Guideline, SEBF8162, "Measuring Procedures and Salvage Procedures for Cylinder Head Assemblies and Related Components".
By following this guideline, reused components can be expected to give normal performance until the next overhaul if the components are used in the same application. Do not install the component if the component is not reusable. During salvage operations, correct any conditions that might have caused the original failure.
Safety
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Personal injury or death can occur from not following the proper
procedure or the recommended tooling.
To prevent the possibility of injury or death, follow the established procedure using the recommended tooling.
References
Reference Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications"
Reference Reuse and Salvage Guideline, SEBF8162, "Measuring Procedures and Salvage Procedures for Cylinder Head Assemblies and Related Components"
Reference Special Instruction, SMHS6998, "Instructions for the Use of 5P-6518 Dial Indicator Fixture Gp -Parts Reusability"
Reference Catalog, NENG2500, "Dealer Service Tool Catalog"
Reference Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on C-Series Engines"
ReferenceTruck Engine News, SEBD6847
Required Tooling
Table 2
Part Number Description
6V-2010 Polishing Stone
FT-1753 Valve Stem Protector
6V-0087 Valve Stem Gauge Gp
6V-7059 Micrometer
6V-2034 Micrometer Adapter
441-0714 Spring Tester
9U-5360 (1)
Valve Face Grinder 9U-5374 (2)
6V-2033 Brush
6V-2032 Adapter
5P-6518 Dial Indicator Fixture Gp r080es10Caterpillar: Confidential Yellow
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( 1 ) 115 Voltage
( 2 ) 230 Voltage
Valves
Nomenclature of the Valve
Illustration 3 g01334820
Valve with a single keeper
(1) Retaining groove for the valve spring
(2) Valve stem
(3) Area of the fillet
(4) Valve head
(5) Valve face
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Illustration 4 g01334821
Valve with a double keeper
(1) Retaining grooves for the valve spring
(2) Valve stem
(3) Area of the fillet
(4) Valve head
(5) Valve face
Procedure to Clean Valves
Illustration 5 g01334822
The valve on the left has not been cleaned. The valve on the right has been cleaned with the sodium bicarbonate method.
Solvents
If there is only a small amount of carbon residue on the valves, use a good cleaning solvent to clean the valves. Use one or more of the following methods to clean hard carbon deposits.
Sodium Bicarbonate
Use the sodium bicarbonate method to remove oil, grease, and carbon deposits from the area of the fillet, the valve face, and the valve head. For the sodium bicarbonate cleaning method, use a blasting crystal size of 70 microns (0.0028 inch). For best results, use 163-3951 Blast Media which is specially formulated to remove deeply embedded carbon deposits. Use a number four nozzle with a pressure of 483.0 to 550.0 kPa (70.00 to 80.00 psi). Use a flow rate of 2100.0 L/min (554.76 US gpm) of compressed air. Set the differential pressure at 4.45 N (1.000 lb) in order to control the flow of the media for blasting in the range of 3.34 N (0.750 lb) per minute. r080es10
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There are many benefits to using sodium bicarbonate as the media for blasting. Unlike other types of blasting media, grease and oil does not need to be cleaned from the valves before blasting. Sodium bicarbonate is soluble in water which provides options for waste disposal. Used sodium bicarbonate can be used as a neutralizer for treatment of waste. Sodium bicarbonate is an environmentally friendly chemical for workers, parts, and the environment.
Glass Beads
Use glass beads to remove heavy carbon deposits from the area of the fillet, the valve face, and the valve head. Use glass beads that are 88 to 150 microns (0.0035 to 0.0059 inch) with 550.0 to 620.0 kPa (80.00 to 90.00 psi) of air pressure for best results. Glass beads that are 125 to 177 microns (0.0049 to 0.0070 inch) through size 74 to 125 microns (0.0029 to 0.0049 inch) are acceptable.
NOTICE
Never use glass beads that are larger than 230 microns (0.0091 inch).
Protection of valve stems from glass beads and steel shot is necessary at all times. Do not mix aluminum oxide or any other material with glass
beads.
Note: Do not use glass beads or steel shot in a cabinet that is configured for sodium bicarbonate cleaning. Glass beads and steel shot will not tolerate the grease or oils on the valves and the valves will require a cycle of wash prior to blasting.
NOTICE
Do not use the glass bead method to clean the valve stem. The results
will be rapid wear of the valve guide. Protection of the stem area from glass beads is important.
Steel Shot
Use steel shot in order to remove very heavy carbon deposits from the area of the fillet, the valve face, and the valve head. Use size S170 steel shot for best results. Larger sizes of shot can damage the valve.
NOTICE
The steel shot will not give an acceptable finish on the valve stem. Use
the FT-1753 Valve Stem Protector or similar type of hose on the valve
stem in order to protect the valve stem.
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6V-2033 Brush and 6V-2032 Adapter
Illustration 6 g01335052
6V-2033 Brush and 6V-2032 Adapter
One way to clean valve stems is to use tooling 6V-2033 Brush and 6V-2032 Adapter . Refer to Illustration 6. Tooling (H) is a flap brush with a diameter of 203 mm (8.0 inch). The width is 51 mm (2.0 inch) and the center hole has a diameter of 76 mm (3.0 inch). Tooling 6V-2032 Adapter fits 6V-
2033 Brush and 6V-2032 Adapter has a center hole of 13 mm (0.5 inch). If necessary, the center hole can be made larger.
The best speed for the 6V-2033 Brush is 2100 rpm. Do not use a 3450 rpm motor. A motor that runs at 1725 rpm is acceptable only if the motor does not slow down during cleaning of the valves.
NOTICE
The 6V-2033 Brush could come apart if it is run faster than 2100 rpm
and could result in injury to the operator.
If 6V-2033 Brush is not available, use a Scotch-Brite Type 5A brush. This brush is a fine grade that is used for finishing. Other grades or other brushes from another supplier may result in an incorrect surface finish.
Vibratory Cleaning
A vibratory cleaner can also be used to clean the valves if the cleaner gives the correct final surface finish to the valve stem.
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Illustration 7 g03151879
Typical vibratory cleaner
The size and the type of pellet that is used in a vibratory cleaner controls the surface finish of the valves being cleaned. If necessary, polish the valve stem with Scotch-Brite material to get the correct surface finish. If you do not use Scotch-Brite material, check the surface finish on the valves frequently.
NOTICE
Do not use a wire brush or wire wheel in order to remove carbon
deposits from valves. Wire brushes or wheels will make scratches on the valves, which can cause a valve failure.
Note: Inspect the area of the retaining grooves of the valves for discoloration before using a vibratory cleaner. After cleaning, apply a light coat of oil on the valves to prevent rust.
Note: Do not clean the valves with a grinder that has a Scotch-Brite abrasive disc. Grinding with Scotch-Brite discs creates airborne particles that will contaminate areas of the shop.
NOTICEr080es10
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Be sure to install new exhaust valves during normal cylinder head
salvage of 158.75 mm (6.250 inch) bore engines that are used in high
output applications, such as locomotive or marine main propulsion applications. In other applications, all exhaust valves can be used again
if the exhaust valves are acceptable according to the specifications in
this guideline.
Inspection of the Valves
To save time, check the condition of the valves before the valves are cleaned, ground, or measured.
Area of the Retaining Grooves
Illustration 8 g03151216
Remove any raised edges with the Scotch-Brite method or use a stone for polishing of a fine grade such as the 6V-2010 Polishing Stone .
Use the valve again.
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Illustration 9 g03151237
Severely damaged valve that cannot be reused.
Do not use the valve again.
Illustration 10 g03151297
The valve has surface wear, but no damage to the sides or the bottom of the grooves. Use Scotch-Brite to polish the area.r080es10
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Use the valve again.
Valve Stem
Illustration 11 g01335635
This valve has discoloration on the valve stem and build-up on the fillet area and the valve face. This valve can be reused after cleaning. Never reuse valves that have discoloration in the area of the retaining grooves.
Clean and then reuse the valve
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Illustration 12 g01335640
The valve in Illustration 11 after the valve has been cleaned.
Use the valve again.
Illustration 13 g01335641
Erosion on the valve stemr080es10
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Do not use the valve again.
Illustration 14 g01335642
Rust can be removed by cleaning.
Use the valve again.
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Illustration 15 g03151356
The valve stem contains a small mark or a scratch but the stem does not have any raised or sharp edges. The valve is not reusable if the mark is deeper than the stamp of the part number.
Use the valve again.
Illustration 16 g03151378
The valve stem has a mark or a scratch with a raised or sharp edge after cleaning with the Scotch-Brite or the vibratory method.
Do not use the valve again.
NOTICE
Do not use a valve if normal cleaning methods will not remove a raised
edge on the part of the valve stem that moves inside the valve guide.
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Illustration 17 g03151418
Grooves cannot be felt with a fingernail.
Use the valve again.
Illustration 18 g03151437
Deep grooves that can be felt with a fingernail.r080es10
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Do not use the valve again.
Illustration 19 g03151440
The arrow shows the location of the weld on the valve stem. The weld line cannot be felt with a fingernail.
Use the valve again.
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Illustration 20 g03151459
The valve stem shows severe scuffing and/or seizure.
Do not use the valve again.
Illustration 21 g03151578
The valve stem shows moved metal as a result of scuffing damage.
Do not use the valve again.
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Illustration 22 g01335679
The chromium coating on the valve is heavily worn. Only a few Caterpillar valves have a chromium coating on the stems.
Do not use the valve again.
Illustration 23 g03151716
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Some of the valves have a change in diameter above the area of the fillet. The valves that are used in engines with a 158.8 mm (6.25 inch) bore have a change in diameter above the area of the fillet. This change in diameter is acceptable only if the other valves from the same engine have the same change in diameter.
Use the valve again.
Illustration 24 g03151776
Some of the valves are smaller at the indicated points so the area of the fillet makes a smooth transition with the surface of the stem.
Use the valve again.
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Illustration 25 g03151818
Valve stem with a severe change in diameter.
Do not use the valve again.
Illustration 26 g03151856
Valve stem with severe changes in diameter.r080es10
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Do not use the valve again.
Illustration 27 g03151962
The valve stem is enlarged from engine operation.
Do not use the valve again.
Measurements of the Valve Stem
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Illustration 28 g03152438
Always measure wear on valve stems.
Use a 6V-0087 Valve Stem Gauge Gp or a 6V-7059 Micrometer to measure the diameter of the valve stem. Measure the top and the bottom area that moves inside the valve guide.
If a 6V-7059 Micrometer is used to check the diameter of the valve stem, adjust the 6V-7059
Micrometer to the correct dimension for reusability and locked at the minimum diameter. Refer to Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications" or Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on Engines with ACERT Technology" for the correct dimensions for reusability. The valve is worn and the valve must be replaced if the micrometer or the correct gauge slides easily over the stem at any position on the stem.
Note: Some valves have a tapered valve stem.
NOTICE
Do not use force or roll the valve stem into the gauge or micrometer. Forcing the valve stem can cause early wear on the gauge and incorrect
valve stem measurements.
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Illustration 29 g01336038
The micrometer slides over the valve stem.
Do not use the valve again.
Illustration 30 g01336039
Use a 6V-0087 Valve Stem Gauge Gp to check the diameter of the valve stem. A 6V-0087 Valve Stem Gauge Gp will not slide easily over the valve stem. r080es10
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Use the valve again.
Area of the Fillet
Illustration 31 g03152457
The fillet area has significant cracks.
Do not use the valve again.
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Illustration 32 g03153017
Normal bonding between the valve head and the material of the valve face.
Use the valve again.
Illustration 33 g03153023
Do not use any valve that has been damaged in the fillet area.r080es10
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Do not use the valve again.
NOTICE
Be careful to prevent damage to the fillet area when the valve is
installed, ground, or handled. Valves with damaged fillet areas can cause engine damage.
Illustration 34 g01336048
The area of the fillet contains erosion.
Do not use the valve again.
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Illustration 35 g01336051
The area of the fillet contains foreign material.
Do not use the valve again.
Illustration 36 g03153036
The area of the fillet contains pits of rust, scale, and erosion.r080es10
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Do not use the valve again.
Illustration 37 g01336067
Rust is removed when the valve is cleaned and there are no pits, deposits, scale, or erosion under the rust.
Use the valve again.
Valve Head
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Illustration 38 g03153076
Large or deep marks exist on the valve head. Some of the marks are near the edge of the valve head.
Do not use the valve again.
Illustration 39 g03153157
All of the marks are light and are not near the edge of the valve head.r080es10
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Use the valve again.
Illustration 40 g01337701
The valve head is severely damaged.
Do not use the valve again.
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Illustration 41 g03154536
The valve head is damaged and cannot be reused.
Do not use the valve again.
Illustration 42 g03154599
The valve head contains a small amount of erosion. Do not use a valve if the valve has more erosion than the valve in this illustration.
Use the valve again.
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Illustration 43 g03154637
The valve head contains too much erosion and cannot be reused.
Do not use the valve again.
Illustration 44 g03154660
The valve head has a cup more than 0.25 mm (0.001 inch) deep.r080es10
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Do not use the valve again.
Illustration 45 g03154663
A small cup is normal even on new valves. Use a straight edge and a feeler gauge in order to check the valve head for a cup.
Use the valve again.
Valve Face
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Illustration 46 g01337710
Normal wear on the fillet area of the valve.
Use the valve again.
Illustration 47 g01337713
Too much wear on the valve face.r080es10
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Do not use the valve again.
Procedure to Grind Valves
Note: C175 valves are NOT to be ground. The valves are precision machined and the valves do not have enough material to grind successfully. Any attempt to do so will cause the valve to lose durability.
All specifications for grinding valves are given in Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications" or Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on Engines with ACERT Technology".
Note: After a valve has been ground, inspect the face and measure the thickness of the lip. Refer to the ""Procedure to Measure Valve Lip Thickness" " section of this guideline.
Valve Face
Illustration 48 g03154737
1. Adjust the carriage on the grinder to the correct valve face angle.
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Illustration 49 g03154916
2. Follow the manufacturer's instructions for installation of the valve into the chuck.
Illustration 50 g03154956
3. Adjust the stop on the carriage for maximum movement to the left.
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Illustration 51 g03154997
4. Always dress the grinding wheel so the grinding wheel does not have any nicks, grooves, or foreign material.
Illustration 52 g03155021
Valve face that has been unevenly ground
5. Examine the rotating valve in the grinder in order to determine if the valve is warped or bent. Valves that are warped or bent can cause uneven grinding. Bad maintenance of the grinder will
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also cause uneven grinding. Valves that are warped must be replaced unless the thickness of the lip is correct after grinding.
Do not use the valve again.
6. Adjust the flow of cooling liquid so the flow is directly on the point of contact between the grinding wheel and the valve face. Always wet-grind valves.
7. Follow the manufacturer's instructions to properly grind the valve.
Illustration 53 g01337941
8. After the valve is ground, inspect the valve face. There must be no grooves, pits, marks, or burns on the face.
NOTICE
If the maintenance on the valve grinding machine is not correct, valve failure is possible. To check the valve grinder chuck, install a new valve
in the chuck and use a dial indicator to check the runout on the face of
the valve. The runout must not be more than 0.025 mm (0.0010 inch).
If the dial indicator reads too much runout, the chuck is damaged and needs to be repaired or the bearings are bad or loose.
Check the channels that the valve grinding machine slides in. If any
movement can be felt, then the channels must be adjusted or a repair must be made. When the valve grinding equipment is in good
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Repair of the Valve Stem End
Illustration 54 g01337963
The end of the valve stem has not been ground.
Illustration 55 g01337993
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The end of the valve stem has been ground.
Use the valve again.
The end of the valve stem must be smooth and level. The end of the valve stem should have a maximum surface finish of 0.81 micrometer (32.000 microinch). Remove only 0.025 mm (0.0010 inch) with each grind. Then inspect the end of the valve stem.
Note: All the valves do not need to be the same length.
Illustration 56 g03155038
Grind the end of the valve stem to create a smooth surface.
Use the valve again if any of the original chamfer can be seen. Remove sharp edges with Scotch-Brite or with an Arkansas stone.
Procedure to Measure Valve Lip Thickness
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Illustration 57 g01337997
This illustration shows the thickness of the lip on the valve. Use either of the following two methods in order to check thickness of the lip.
Illustration 58 g01338011
Use a 5P-6518 Dial Indicator Fixture Gp in order to measure the thickness of the lip on the valve.
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Illustration 59 g01338013
Use a 6V-7059 Micrometer with a 6V-2034 Micrometer Adapter to measure the thickness of the lip on the valve.
Measure the thickness of the lip with either a 5P-6518 Dial Indicator Fixture Gp or a 6V-7059
Micrometer with a 6V-2034 Micrometer Adapter . Refer to the Catalog, NENG2500, "Dealer Service Tool Catalog" and Special Instruction, SMHS6998, "Instructions for the Use of 5P-6518 Dial Indicator Fixture Gp -Parts Reusability" for more information.
Note: Remove any burrs from the vee blocks on the fixture with a small 6V-2010 Polishing Stone . Burrs can damage the valve stem.
Refer to Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications" or Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on Engines with ACERT Technology" for the correct thickness of the lip.
Note: Some difference in thickness of the lip is permissible. If the thickness of the lip is less than the minimum specification at any point, do not use that valve again.
Valve Springs
Inspection and Reuse
This section contains graphics of springs that can and cannot be reused. Do not reuse valve springs that this guide recommends not to use again.
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Illustration 60 g01338022
Nicks and deep scratching on the valve spring.
Do not use the spring again.
Illustration 61 g03155598
Light wear in the first 180 degrees of turn is acceptable.r080es10
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Use the spring again.
Illustration 62 g01338028
Rust deposits on the spring.
Do not use the spring again.
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Illustration 63 g03155618
Notches at the end of the spring are not acceptable.
Do not use the spring again.
Illustration 64 g01338033
Wear on the valve spring between the coils and on the end of the spring.
Do not use the spring again.
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Illustration 65 g03155696
Spring has wear on the sides and cannot be reused.
Do not use the spring again.
Illustration 66 g01338038
Use a square or use a straight edge and a feeler gauge in order to check each valve spring for distortion.r080es10
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Use the spring again if it passes distortion checks.
The spring can be used again if the spring meets the specifications in Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications" or Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on Engines with ACERT Technology".
Note: Do not use a spring again if the spring has more distortion than the dimensions given in Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications" or Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on Engines with ACERT Technology".
Test Procedure for Valve Springs
Note: The specifications in Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications" or Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on Engines with ACERT Technology" must be used for the following procedures.
1. Adjust the stop at the top of the valve spring tester in order to compress the spring only to the Minimum Operating Length.
2. Put the spring under compression until the spring is at the Assembled Length. Make a record of the force that is needed to hold the spring at this length.
3. Continue to compress the spring until the spring is at the Minimum Operating Length. Make a record of the force that is needed to hold the spring at this length.
4. Make a comparison of the results to the specifications given in Reuse and Salvage Guideline, SEBF8034, "Valve and Valve Spring Specifications" or Reuse and Salvage Guideline, SEBF9006, "Specifications for Cylinder Head Assemblies on Engines with ACERT Technology".
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Illustration 67 g03680564
Use 441-0714 Spring Tester to test the springs.
Valve Rotocoils and Locks
NOTICE
Never reuse valve rotocoils or locks.
Floating Valve Bridges
NOTICE
Do not attempt to reuse the 6I-1458 Valve Bridge .
The 6I-1458 Valve Bridge can cause valve lash adjustment problems on cylinder heads that have been salvaged. Therefore, the 6I-1458 Valve
Bridge has been canceled and replaced with the 348-7743 Valve
Bridge . If there is trouble setting valve lash after the 348-7743 Valve
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Bridges are installed, then the 363-3731 Valve Bridges must be used.
The 363-3731 Valve Bridges are thinner than the 348-7743 Valve
Bridges . Refer to Truck Engine News, SEBD6847 for more information on the application of the 363-3731 Valve Bridges .
3406E and C15 Bridges
Illustration 68 g01338184
No pitting, raised material, waving, or wear steps on top of the bridge or in the holes on the valve stem.
Use the bridge again.
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Illustration 69 g01338297
Pitting, raised material, waving, or a wear step on top of the bridge or in the holes on the valve stem.
Do not use the bridge again.
Illustration 70 g01338288
The depth of the pocket on the valve stem is less than 6.7 mm (0.26 inch). No pitting, raised material, waving, or wear steps. r080es10
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Use the bridge again.
Illustration 71 g01338291
The depth of the pocket on the valve stem is greater than 6.7 mm (0.26 inch) or the pocket of the valve is worn and damaged.
Do not use the bridge again.
3126B Bridges
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Illustration 72 g01352432
No pitting, raised material, waving, or wear steps on top of the bridge.
Use the bridge again.
Illustration 73 g01352475
Pitting, raised material, waving, or a wear step on top of the bridge.r080es10
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Do not use the bridge again.
Illustration 74 g01352479
No pitting, raised material, waving, or wear steps in the pocket for the valve stem.
Use the bridge again.
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Illustration 75 g01352485
Pitting, raised material, waving, or a wear step in the pocket for the valve stem.
Do not use the bridge again.
3176, C10, and C12 Bridges
Illustration 76 g01352489
No pitting, raised material, waving, or wear steps on top of the bridge.
Use the bridge again.
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Illustration 77 g01352491
Pitting, raised material, waving, or a wear step on top of the bridge.
Do not use the bridge again.
Illustration 78 g01352492
No pitting, raised material, waving, or wear steps in the pocket of the valve stem.r080es10
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Use the bridge again.
Illustration 79 g01352493
Pitting, raised material, waving, or a wear step in the pocket for the valve stem.
Do not use the bridge again.
3500 Bridges
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Illustration 80 g01352495
No pitting, raised material, waving, or wear steps on top of the bridge.
Use the bridge again.
Illustration 81 g01352497
Pitting, raised material, waving, or a wear step on top of the bridge.r080es10
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Do not use the bridge again.
Illustration 82 g01352498
No pitting, raised material, waving, or wear steps in the pocket for the valve stem.
Use the bridge again.
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Illustration 83 g01352501
Pitting, raised material, waving, or a wear step exist in the pocket for the valve stem.
Do not use the bridge again.
Dowel Valve Bridges
3406, 3408, and 3412 Bridges
Illustration 84 g01352505
No pitting, raised material, waving, or wear steps on top of the bridge.
Use the bridge again.
Copyright 1993 - 2014 Caterpillar Inc.
Todos los derechos reservados.
Red privada para licenciados del SIS.
Fri Sep 5 12:19:36 EST 2014
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