| Checking steering system for leaks |
| The power steering system must be checked for leaks after assembly operations and in the case of hydraulic fluid losses in the reservoir. |
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| Remove front left wheel (if not already done). |
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| Remove noise insulation → Rep. gr.66 (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 builds up the maximum possible pressure. |
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| Check pressure line and return line for leaks. |
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| Check all line 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 seal/line. |
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| Check motor/pump unit for leaks. Renew motor/pump unit if leaks are found. |
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| Check hydraulic fluid reservoir for leaks. Renew reservoir if leaks are found. |
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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 the following components for leaks with the steering box removed: |
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| Pinion seal on steering box valve housing |
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| All line connections on steering box |
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| Push back boots for next test step: |
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| Open hose clips on boots. |
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| Push back the boot. If hydraulic fluid is visible in steering box housing or in boot, steering box must be renewed. |
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| Install wheel (front left) and tighten bolts → Rep. gr.44. |
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