ROLLER 8C2128 - Caterpillar

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 "" 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. 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, 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 Cast Aluminum
Hardness N/A Flame Spray Equipment and Procedure
Table 3
Maximum Surface Finish 3.175 µ meters (125.0000 µ in)
Reason for Spraying Foreign material damage or grooves in contour bore
Mating Part Contact Area & Material Controlled clearance
Metco Equipment Type 6P-II
Metco Material Metco 452 or 453
Finished Thickness As required
Finishing Allowance 0.51 mm (0.020 inch) per side
Spray Angle 90° to contour
Substrate Pre-Heat Temperature None
Substrate Temperature During Spraying Not to Exceed 94° C (200° F)
Auxiliary Cooling Not required
Rotation/Traverse Device Lathe or turntable
Rotation/Traverse Speed 60.96 meters per minute (200.000 SFPM) minimum
Surface Preparation Method Grit Blast
Finishing Method Machine or hand grind
Grinding Equipment Type Die grinder
Recommended Wheel Sanding arbor
Machining Equipment Type Tracer lathe
Recommended Cutter Grade 883 Carboloy or equivalent
Table 4
Flame Spray Process (6P) Procedure
Clean Part Non-oil base solvent wash
Undercut Not required. If damage to contour bore is due to a deposit of compressor wheel material, the deposit must be removed with a hand grinder or scraper prior to oxide removal.
Chamfer Not required
Remove oxide Emery paper or glass beading
Mask for blast Use metal mask
Blast Equipment Suction cabinet
Grit type and size G-25 angular steel
Blast air pressure 0.62 MPa (90.000 psi)
Blast nozzle to work distance 63.5 mm (2.50 inch).
Mask for spray Use metal mask
Spray equipment type 6PII
Auxiliary cooling Not required
Nozzle 6P7A-B - "B"