Car steering BMW 5 Series E12

Steering Specifications
Mechanical steering Up to model year 1982 on BMW "518", "520", "520i", "525" mechanical steering with a globoid cylindrical worm - double-ridge roller...

Steering linkage parts
Steering linkage parts: 1 - pendulum lever; 7 — bipod; 13 - rotary lever; 15 - medium thrust.

Steering shaft parts
Steering shaft parts: 1 — coupling; 3 - elastic coupling; 7 — elastic coupling flange; 9 — steering shaft.

Mechanical steering gear parts
Mechanical steering gear parts: 1 — worm shaft; 4 — steering gear housing; 5 - needle bearings of the knuckle shaft; 10 - disc thrust washer.

Power steering details
Power steering gear parts: 1 — knuckle shaft assembly with toothed sector; A - steering gear housing; B - worm plunger; B - ball and ball circulation guide...

Hydraulic power steering system
Hydraulic power steering system: B - steering mechanism; P - pump; R — tank; 4 — pump pulley.

Sectional view of power steering mechanism
Sectional view of power steering mechanism: 1 — steering gear housing; 2 — piston; 3 - ball circulation guide tube; 4 - balls; 5 — worm shaft; 6 - toothed...

Power steering pump
Power steering pump: 4 - drive roller; 15 — rotor-stator unit; 25 — excess pressure valve.

Removal the steering gear
Set the steering wheel to the straight-ahead position. Remove the cotter pin and unscrew the nut securing the middle tie rod ball joint to the pitman arm. Use...

Disassembling the steering mechanism
Drain the oil from the steering gear housing. Make sure there are marks indicating the relative position of the bipod relative to the bipod shaft. If...

Steering gear assembly
Clean the parts and check their condition. Press new needle bearings, worm shaft upper bearing outer race and new seals into the steering gear housing....

Installing the steering gear
The steering gear is installed in the reverse order of removal, taking into account the following: tighten the steering gear housing mounting bolt to the front...

Removal the steering gear (with power steering)
Turn the steering wheel all the way to the left so that the steering gear piston reaches the top position, then drain the oil from the steering gear housing....

Disassembling the steering mechanism (with power steering)
After making sure that there are alignment marks on the bipod and on the end of the bipod shaft, remove the bipod using puller 7027. After loosening the lock...

Assembly and installation of the steering mechanism (with power steering)
Note: It is recommended to replace the O-rings every time the steering gear is disassembled, even if they appear to be in good condition. Before installing the...

Bleeding the brake hydraulic system
Remove the power steering reservoir cap and fill it with oil up to the normal level mark. Start the engine and add oil to the reservoir as the level drops...

Checking the steering wheel effort
Remove the steering wheel trim (installed with latches). Disconnect the steering knuckle ball joint from the steering link center rod. Install the drive sleeve...

Power steering pump repair
If the discharge pressure is insufficient, first check the tension of the pump drive belt (the normal deflection of the belt when pressing on the middle of the...

Features of disassembly and assembly of a pump with performance regulation depending on the rotation frequency
After removing the rotor, remove the drive side plate. Remove the drive belt pulley, seal and snap ring. Press the shaft and ball bearing out of the pump...

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