Vehicles after change point in 1982
REPLACING RADIAL OIL SEAL
FOR SECTOR SHAFT AND
STEERING WORM AND SEALING
INTERMEDIATE COVER
- POWER STEERING GEAR
REMOVED -
Absolute cleanliness is essential for work on
steering gears!
Power steering gear code no.: 8052 955 206.

Bend open lockplate and unscrew nut.
Installation:
Replace lock plate.
Tightening torque*.
Lock nut.


* See Specifications

Pull off steering drop arm with Special Tool
32 2 000.

Installation:
Check installed position (marks on steering
drop arm and shaft).

Mark position of cover to case.
Unscrew nut (1).
Unscrew bolts (2) and lift off cover by turning
adjusting screw (3).

Pull sector shaft out of case.

Pull off cap (1).
Unscrew bolts (2).

Mark position of valve housing (1) and
intermediate cover (2) to case.
Take off valve housing (1).

Remove angular ball bearing (1).
Pull out worm with piston.

Set up piston and remove worm by turning
clockwise.
Caution!
23 loose balls.

Lift out circlip.
Press out outer radial oil seal (1) and inner
radial oil seal (2).

Lubricate lips of radial oil seals with grease.
Insert support ring (3) and press in radial oil
seal (2) with Special Tool 32 1 060 that lip
of seal faces inside of case.
Press in radial oil seal (1) with Special Tool
32 1 070 (lip of seal facing inside of case) and
insert circlip (4).

Replace seals (1 ... 4) and O-rings located
behind.
Coat seals with hydraulic fluid*.


* See Service Information of Gr. 00

Replace seal (1) and O-ring (2) located behind.
Coat seal with hydraulic fluid*.


* See Service Information of Gr. 00

Replace O-rings (1 ... 3) on both sides and
O-ring (4).

Place bearing ring (1) and axle bearing (2) in
intermediate cover (with a little grease to hold).

Place intermediate cover on worm head, being
careful not to damage seal of worm.

Pull off cap (1) and remove circulating pipe
(2).

Replace seal (1) and O-ring located behind.
Coat seal with hydraulic fluid*.


* See Service Information of Gr. 00

Slide worm head into piston.
A = approx. 6 cm (2.362´´).
Insert 16 balls into thread grooves of worm
through bore (1) while turning the worm,
until balls have been forwarded to bore (2).

Place 7 balls in circulating pipe (both outside
balls with a little grease) and insert circulating
pipe in piston.

Insert O-ring (1) and seal (2) in cap.
Press cap into piston.

Place O-ring (1) in steering case.

Push piston into steering case, being carful
not to damage seal of piston.

Install new radial oil seal (lip lubricated with
grease) in valve housing with Special Tool
32 1 080 (lip faces inside of case).

Insert ball bearing (1) and Special Tool
32 3 054.

Push valve housing over seals of worm head
carfully and tighten bolts.
Tightening torque*.
Remove Special Tool 32 3 054.


* See Specifications

Turn steering to one of the end positions.
Turn back about 2 turns until marks on spindle
and case are aligned = straight ahead position.

Pack cap with grease and press on to spindle -
marks on spindle, cap and case must be aligned.

Slide in sector shaft (mark on face at right angle
to piston axis) carefully that radial oil seals are
not damaged.

Replace O-ring in cover.
Position cover on case by turning the adjusting
screw anticlockwise.

Bolt cover.
Tightening torque*.
Screw on lock nut finger tight (because of
sealing surface on cover).


* See Specifications

Adjusting Pressure Point:
Mount Special Tool 32 1 000 on spindle and
apply torque meter 00 2 000.
Measure friction torque about 1/2 turn before
end stop.
Move steering gear to straight ahead position.
Turn adjusting screw until friction torque is
40 to 50 Ncm (3.5 to 4.3 in.lbs.) higher than
the previously measured friction torque value
while "passing" the pressure point.
Total friction torque must not exceed 160
Ncm (14 in.lbs.).
Tighten lock nut to 25 Nm (18 ft.lbs.).
Recheck friction torque.
Attach steering drop arm.
Check operation of steering gear after installation