Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Steering Pump - SAGINAW & ZF: Description
Two kinds of power steering pumps are used, Saginaw and ZF. The ZF pump is non-serviceable. If the pump, reservoir or cap fails or leaks, it should be replaced.
All Saginaw pumps are similar and are overhauled in the same manner. The Saginaw vane power steering pump is a constant displacement, vane type pump with either an integral or remote fluid reservoir. Shaft-driven pumping vanes move the fluid. When pressure exceeds set limits, the flow control pressure relief valve opens and allows fluid to return to the inlet side of the pump. Under normal conditions the pressure relief valve is closed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.