VALVE GP-RELIEF 4402710 - Caterpillar

Do not use the part again.
Illustration 101 g01493685
Impact damage to the edge of the spacer plate affects the thickness of the spacer plate and the sealing capability of oil.
Do not use the part again.
Illustration 102 g01493686
Deep cut (8) between large bolt hole (4) and the hole for the clearance of the cylinder liner.
Do not use the part again.
Illustration 103 g01493687
The illustration shows a deep cut (9) around the large water port (2).
Do not use the part again.Cleaning Aluminum Spacer Plates
The aluminum spacer plate requires more care during handling and cleaning. Extra care will prevent damage to the spacer plates, and extra care will also retain reusability. Recommended materials for cleaning are brake cleaner solvent and/or blasting with glass beads.Steps for cleaning aluminum spacer plates
Use only glass beads. Do not use aluminum oxide or an abrasive material. Do not mix any material with glass beads.
Do not use wire brush or wire wheel.
Do not sand or grind the spacer plate.
Do not use Scotch Brite pads to clean spacer plates.Brake fluid can be used to clean PtFE Teflon residue from spacer plates. Glass beads should be used with certain precautions to clean aluminum plates. Glass beads tend to alter plate dimensions. Glass beads can hide cracks that are normally seen during visual inspection.Note: Do not use glass beads that are larger than 0.2311 mm (0.0091 inch) in size to clean the spacer plate.For the best results, use glass beads that are size 10. The size of the glass beads must be 0.0889 mm (0.0035 inch) to 0.1499 mm (0.0059 inch). The air pressure must be from 550 kPa (79.8 psi) to 620 kPa (89.9248 psi). Change the glass beads and check the nozzle regularly for best results.Cleaning Steel Spacer Plates
The following methods are also acceptable for cleaning the steel spacer plate:
Aluminum oxide
Wire brush or wire wheel
Scraping or sandingGlass beads can be used to clean the spacer plates. Change the glass beads and check the nozzle regularly for best results. Use the following specifications for glass beads:
Size 10 glass beads.
0.088 mm to 0.149 mm (0.0035 inch to 0.0059 inch)
550 kPa to 620 kPa (80.0 psi to 90.0 psi) air pressureNote: Do not use glass beads that are larger than 0.23 mm (0.009 inch) to clean the spacer plate. Large glass beads may damage the spacer plate.Visual Inspection for Unacceptable Cracks and Depressions
After cleaning, check both sides of the plate for cracks and connecting depressions on the surface due to corrosion, erosion, and handling damage in the following areas.
Check within 6.0 mm (0.24 inch) along the edge of the plate and the opening for the valve mechanism.
Check within 6.5 mm (0.26 inch) along the edge of the gasket. This area is the conjunction of the gasket and the plate.
Inside and 6.0 mm (0.24 inch) around oil supply hole (5).
Check within 6.0 mm (0.24 inch) around small water ports and large water ports (2 and 3).
Illustration 104 g01493688
Deep scratch (10) and damage (11) around oil supply hole (5).
Do not use the part again.Do not use the spacer plate