| Checking steering system for leaks |
| The power steering system must be checked for leaks after assembly operations and in the case of hydraulic fluid loss in the reservoir. |
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| Remove noise insulation (if not already done). |
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| Start engine; run at idling speed. |
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| Turn steering wheel to full lock in both directions and hold for a maximum of 5 ... 10 seconds. This develops the maximum possible pressure. |
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| Check pressure line and return line for leaks. |
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| Check all pipe and hose connections for firm seating and for leaks. In the event of leaks, re-tighten line or hose connection to specified torque or renew gasket/seal/line. |
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| Check vane pump for leaks. Renew vane pump if leakage occurs. |
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| Check hydraulic fluid reservoir for leaks. Renew reservoir if leakage occurs. |
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| Check hydraulic fluid level and top up if necessary → Chapter. |
| If the hydraulic fluid level drops in reservoir even though all hose and/or pressure line connections are absolutely tight, then the power steering box may be the cause of the loss of hydraulic fluid. In this case check the power steering box while removed. |
| Check following components for leaks while steering box is removed: |
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| Pinion seal on steering box valve housing. |
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| All line connections on steering box |
| You will need to slide back the bellows to carry out the next test step: |
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| Open clamps on bellows. |
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| Push boot back. If hydraulic fluid is visible in steering box housing or in bellows then steering box must be replaced. |
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