VOLKSWAGEN PASSAT 1997 B3, B4 / 3.G Service Workshop Manual

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27 - Pipe Do not disconnect Not supplied as
replacement part Sealing ring cannot be
replaced
28 - O-ring
29 - Sealing ring Replace if there is
scoring that can be
seen or felt Already pre-mounted
on new toothed rods
that are supplied as
replacement parts
30 - Sealing ring Not supplied as a
replacement part
31 - Sealing ring Always replace Page 31 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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Power steering gear, disassembling

- Tie rods, removing - see tie rod, removing and
installing (TRW and ZF power steering), Page 48-77
- Close hose connections on power steering gear
if not already done

1 - Plastic locking screw
2 - Plastic locking screw Note:
Use jaw covers and check jaw covers for
contamination; e.g. metal chips or the like - Clean outside of power steering gear - Open hose clamp and push back boot - Clamp steering gear with toothed rod in vise and
remove tie rod - Remove tie rod - Take steering gear out of vise, screw on bracket
3315/1 and tighten bracket in vise Page 32 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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- Mark position of adjusting screw and lock nut to
the housing (arrow) Note: - Screw lock nut together with adjusting screw Do not change position of adjusting screw to lock
nut when removing If necessary, remove adjusting screw together
with lock nut using tool 3115/6 Pressure piece/adjusting screw are slightly
stressed with slight spring pressure
1 - Ratchet (standard commercial) 2 - Adjusting screw Page 33 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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- Mark installation position of pressure piece and
remove
1 - Spreading pliers (standard commercial) 2 - Pressure piece - Remove circlip for valve body 1 - Needle nose pliers (standard commercial) Page 34 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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If very tightly seated, loosen locking screw with a
hammer and driver - Remove lower locking screw for valve body 1 - Ratchet (standard commercial) - Remove hex nut below valve body 1 - Ratchet (standard commercial) 2 - Open-end wrench (standard commercial) - Drive valve body upward from below with driver - Remove grease from teeth of valve body Page 35 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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- Pull adhesive tape out of the housing Valve body sealing ring, removing - Pull toothed rod all the way to the left - Turn lock washer so that the opening of the circlip
(arrow) is in the groove of the housing
- Continue to turn the lock washer (direction of
rotation left or right) so that the circlip turns out of
the housing
- Pull toothed rod with toothed rod guide out of the
housing, pull off toothed rod guide and place
toothed rod so that toothed rod piston sealing ring
will not be damaged
1 - Needle nose pliers (standard commercial) - Lubricate toothed rod - Drive sealing ring upward A - Puller, e.g. Kukko 21/4 B - Driver When installing the puller -A- make sure that the
claws (arrow on illustration page 13) engage
properly under the sealing ring. The puller must not
be spread too wide because otherwise the seat for
the sealing ring and housing will be damaged or the
sealing ring can jam in the housing. Page 36 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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For easier installation of the puller, it is recommended
that a rubber band be placed around the claws.
Illustration shows the housing in cross section for
better view
1 - Puller, e.g. Kukko 21/4 2 - Rubber band 3 - Sealing ring 4 - Glide bearing do not remove Page 37 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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Inner sealing ring for toothed rod,
pulling out

- Install puller for sealing ring far enough so that
the marking on the tool (arrow) matches the
housing edge (only then will the claws engage
behind the support ring)

- Spread claws -2- of the tool by turning the
spindle forcefully

Note: When introducing the tool, make sure that the
cylinder race is not damaged
1 - Support ring 2 - Claws 3 - Sealing ring 4 - Tool 3315/11 Page 38 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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Parts, cleaning and checking - Install tool VW 771 in the puller - Pull out sealing ring - Before assembly, the housing must be checked for contamination (paint residue, chips, dirt) and
thoroughly cleaned with compressed air and
alcohol
- Clean adhesive surface for adhesive tape in area
of the slot with solvent (e.g. L160 or alcohol)
- Check cylinder race for scoring or other damage. If scoring can be felt, replace entire steering gear
- Clean toothed rod (remove old grease in the tooth
pockets) Page 39 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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Checking toothed rod for scoring If corroded areas or deep scratches are not
noticeable on the toothed rod, the toothed rod must
be replaced
An evaluation of whether the toothed rod was
damaged by force, e.g. by an accident, is not possible
with this visual inspection
If slight scoring (arrows) can be seen/felt on the
toothed rod that are only deep enough that they can
be ground off with sand paper (grain 350-600) the
toothed rod can still be used After sanding, lubricate toothed rod lightly
If the old toothed rod is used again, check the sealing
ring for scoring (visual inspection). If there is scoring
that can be seen or felt, the sealing ring and the O-
ring under it must be replaced. - Sand toothed rod with sandpaper in radial direction (this is only possible with slight scoring)
- Check chamfer on the front sides of the toothed
rod for damage, if necessary remove with a fine
grinding stone and/or sandpaper
1 - Toothed rod 2 - Sand paper (grain 350-600) 3 - Jaw covers Page 40 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1