GEAR-DIFFERENTIAL 3311394 - Caterpillar

Flame Spray Equipment and Procedure
Table 5
Maximum Surface Finish     2.5 Micrometers (100.00 Microinches)    
Reason for Spraying     Bore out of round    
Mating Part Contact Area & Material     Bearing sleeve    
Oerlikon Metco Equipment Type     6P-II by Oerlikon Metco    
Metco Material     Metco 452 or 453 Grind    
Finish Thickness    
0 to 0.25 mm (0 to .010 inch)    
Finishing Allowance    
0.38 mm (0.015 inch) per side    
Spray Angle     81° to center line    
Substrate Pre-Heat Temperature    
85° C (185° F) Do not direct flame on area to be sprayed    
Substrate Temperature During Spraying Not to Exceed    
148° C (300° F)    
Auxiliary Cooling     If desired    
Rotation/Traverse Device     Turntable or lathe    
Rotation/Traverse Speed    
61 SMPM (200.00 SFPM)    
Surface Preparation Method     Grit Blast    
Finishing Method     Machine    
Machining Equipment Type     Rod bore machine or mill    
Recommended Cutter Grade     C-2 carbide
0.38 mm (0.015 inch) radius    
Other Equipment Type     Hone    
Media Recommendation     120 to 180 grit stone    
Table 6
Flame Spray Process (6P-II)     Procedure     Check List    
Clean Part     Wash in non-oil base solvent        
Note: Install rod cap and tighten bolts to proper torque (On
133.35 mm (5.250 inch) rods ONLY, torque to
54.2 N m (40.00 lb ft) plus 120°). Put SP960 Multi-Purpose Grease on the bolt threads and the contact surfaces of the bolt and cap anytime the rods are assembled and torque. Keep grease out of bore to be sprayed.
Undercut     Not required        
Chamfer     All edges - 45° x
0.76 mm (0.030 inch)        
Remove Oxide     Emery paper or Scotch Brite        
Mask for Grit Blast     Use metal mask        
Grit Blast Equipment     Pressure or suction cabinet        
Grit Type and Size     Metcolite "C" or equivalent        
Blast Air Pressure    
550kPa (80.0 psi)        
Blast Nozzle to Work Distance    
50 mm (2.0 inch)        
Remove Blast Mask     No        
Mask for Metal Spray     Use blasting mask        
Metal Spray Equipment Type     6P-II Hand Held Thermo Spray System by Oerlikon Metco        
Auxiliary Cooling     If desired        
Nozzle     6P7C-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 gr (3.2 oz) /min