Pump Overhaul: Inspection
- Check the flow control valve for wear, burrs, and other damage to the edges of the grooves in the valve.
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- Inspect the bore of the flow control valve on the pump housing for scratches and wear.
- Slip the flow control valve back in the pump housing, and check that it moves in and out smoothly. If OK, go to next step; if not, replace the pump as an assembly. The flow control valve is not available separately.
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- Attach a hose (A) to the end of the flow control valve (B) as shown. Then submerge the flow control valve in a container of power steering fluid or solvent (C), and blow in the hose.
- If air bubbles leak through the valve at less than 98 kPa (1.0 kgf/cm2
, 14.2 psi), replace the pump as an assembly. The flow control valve is not available separately.
- If the flow control valve tests OK, set it aside for reassembly later.
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- Inspect the ball bearing by rotating the outer race slowly. If you feel any play (axial or radial) or roughness remove the faulty ball bearing (A), and install a new one (B).
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- Inspect each part shown with an asterisk in the Exploded View; if any of them are worn or damaged, replace the pump as an assembly.