Vehicles after change point in 1982 CHECKING POWER FLOW REGULATOR AND STEERING GEAR Discharge pressure. Install pressure tester between power flow regulator and steering gear. Bleed system. Carry out test as described above. If pressure is less than 8 bar (114 psi), replace power flow regulator 34 33 100. If pressure is more than 8 bar (114 psi), replace steering gear 32 13 060. Recheck flow pressure between pump and power flow regulator.  34 33 100 32 13 060
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2. Checking Pump: Install pressure tester between pump and power flow regulator. Close valve (A). Start engine. Close valve (B) max. 10 seconds and read pressure. Rated pump pressure* ± 10% should be reached. Rated pressure* not reached, check drive belt tightness - 32 41 109. Rated pressure* exceeded, replace pump - 32 41 060. Repeat test. Reted pressure* still not reached, replace pump - 32 41 060. * See Specifications 32 41 109 32 41 060
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3. Checking Reservoir Charging Pressure: Pressure tester between pump and power flow regulator. System bled. Engine not started. Valve (B) open. Valve (A) closed. Start engine and observe pressure tester. Pressure must rise to max. 57 bar (811 psi) and then drop immediately to less than 8 bar (114 psi). If max. permissible pressure of 57 bar (811 psi) is exceeded or there is no immediate pressure drop after reaching max. permissible pressure, replace power flow regulator - see 34 33 100. 34 33 100
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4. Power Steering: Pressure tester between pump and power flow regulator. System bled. Valve (B) open. Valve (A) closed. Engine not started. Lift car. Stop steering from reaching final left lock by 1/2 to 3/4 steering wheel turn with a piece of wood or similar item. |  |
Start engine. Pull steering wheel against final left lock with a force of 100 N (22 lbs.) (force meter) about 5 seconds and read pressure. Limit final right lock and repeat test on right lock. If pressure values are lower than pump pressure determined in point 2, replace steering gear - 32 13 060. 32 13 060
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5. Checking Mechanical Play in Steering: - Pressure point adjusted 32 13 014. - No play in steering column. Pressure tester installed between pump and power flow regulator. System bled. Valve (B) open. Valve (A) closed. Engine not started. Hold steering drop arm in straight ahead position with Special Tool 32 4 030. 32 13 014
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Paste strips of paper on steering wheel hub and casing upper section. Make mark on steering wheel hub (center). |  |
Start engine and open valve (A). Read flow pressure. | |
Turn steering wheel anticlockwise until pressure tester shows 1 bar (14 psi) more than flow pressure. Mark position of steering wheel hub. Repeat step clockwise. If travel exceeds max. value (C) = 7 mm (0.276´´), replace steering gear - 32 13 060. Remove holder and pressure tester. Bleed hydraulic system and, if necessary, add hydraulic fluid**. 32 13 060 ** See Service Information of Gr. 00
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