HARNESS AS-AXLE 3534612 - Caterpillar

Crocus cloth can be used to remove burrs, but the corners (9), (10), and (11) on the valve spool must not be made round.
2. Check for leakage of boost pressure. Connect a controlled air supply with a shut-off valve to the boost port (opening) and put 70 kPa (10 psi) of air pressure in the control, then close the valve. If the control does not hold the pressure, find the leakage: A) Check the gasket at (1). B) Check the surface (12) of the 2P8226 Cover to be sure it is flat. C) Inspect diaphragm (2) for damage or wrong assembly.
Location of points to check in fuel ratio control.3. Inspect the surface (5) of the bore in the 2P8225 Housing (4) to be sure it is smooth and even. A rough bore will not permit a good seal or smooth operation.4. Inspect the 2P8225 Housing (4) for cracks or porous (has very small holes) metal which can permit leakage.
Inspection of fuel ratio control parts.