HOUSING AS-DRIVE 4P0665 - Caterpillar

Precautions and care must be taken to properly mask and remove all grit from block surface and cavities.Time between surface preparation and thermal spray application should be minimal. Allowing excessive time between preparation and thermal spray will result in unacceptable coating performance.
Table 5
Flame Spray Process (6P-II) Procedure Check List
Clean Part Pre-machine block and degrease block deck surface.
See Notice¹ Below
Undercut Must not exceed 1.5 mm (0.06 inch) spray thickness
Chamfer All edges must have at least 0.25 mm (0.010 inch) to 0.50 mm (0.020 inch) chamfer.
Remove Oxide Use fiber flap brush or Clean/strip disc
See Notice¹ Below
Clean Spray Area Metco cleaning solvent or equivalent
Mask for Grit Blast Grit blast - If the entire mating surface is to be flame sprayed, some shops prefer to pre-machine the surface. This process removes any major damage, allows for a recommended minimum 0.25 mm (0.010 inch) coating, reduces technique dependency in producing an even coating, and can reduce material cost and finish machining time.
See Notice2 Below
See Notice3 Below
Grit Blast Equipment Pressure type only
Grit Type and Size 24 mesh aluminum oxide
Blast Air Pressure 690 kPa (100.0 psi)
Blast Nozzle to Work Distance 50 mm (2.0 inch) to 150 mm (6.0 inch)
Remove Blast Mask Remove mask, make sure that surface is clean
See Notice¹ Below
Mask for Metal Spray Tape, Metal Shield, Rubber, Metco Antibond, etc.
Metal Spray Equipment Type 6P-II Hand Held Thermo Spray System by Oerlikon Metco
Nozzle 6P-C7A-K "K" Nozzle
Air Capacity/Pressure 6P-3/Cooling Air 140 kPa (20.0 psi) to 170 kPa (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
0.10 mm (0.004 inch) to 0.15 mm (0.006 inch) per pass
Gun to Work Distance 178 mm (7.0 inch)
Traverse Rate of Gun 36 SMPM (120.0 SFPM)
Gun Fixturing Method Machine mount or hand held
Per Pass Thickness 0.10 mm (0.004 inch) to 0.15 mm (0.006 inch) per pass
Finishing Equipment Standard head and block grinder, Milling machine
Part/Cutter Rotation 92.0 SMPM (300.00 SFPM)
Traverse Speed Rough 203 mm (8.0 inch) per minute finish
38.1 mm (1.5 inch) to 51.0 mm (2.01 inch) per minute
Depth of Rough Cut 0.03 mm (0.001 inch) to 0.05 mm (0.002 inch)
0.25 mm (0.010 inch) to 0.38 mm (0.015 inch)
Depth of Finish Cut 0.03 mm (0.001 inch)
0.13 mm (0.005 inch) to 0.25 mm (0.010 inch)
¹ Visual Inspection for imbedded oils or other contaminants should be conducted during preheat.2 Precautions and care must be taken to properly mask and remove all grit from block surface and cavities.3 Time between surface preparation and thermal spray application should be minimal. Allowing excessive time between preparation and thermal spray will result in unacceptable coating performance.
Specifications
Refer to the following Engine Reuse and Salvage guides for specifications.
Table 6
SEBF8076 Specifications to Salvage Contact Surfaces of Cylinder Blocks
SEBF8101 Specifications