1997 VOLKSWAGEN PASSAT AIR

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- Remove circlip for valve body with needle nose
pliers 1
- Drive valve body out from below with driver - Slide toothed rod all the way in the direction of the
valve body
- Turn circlip so that the pointed end of the circlip is
in the groove (arrow) of the housing Page 64 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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Center roller bearing for valve body, removing - First lift circlip with slotted screwdriver then pull out with pliers
- Before removing toothed rod, clean housing
opening with compressed air
- Remove dirt and any chips that may be present - Pull toothed rod out of the housing to the right with
toothed rod guide
A - Screwdriver B - Pliers (standard commercial) - Lubricate toothed rod When installing the puller A, make sure that the claws
(arrows on fig. N48-0058, page 45) engage
correctly under the sealing ring. The puller must not
be spread too wide because otherwise the seat for
the sealing ring and the housing will be damaged or
the sealing ring can jam in the housing. - Drive center roller bearing out toward the top A - Puller, e,g, Kukko 21/4 B - Driver Page 65 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 jaws.
Illustration shows the housing in cross section for
better view.
Sealing ring for valve body, removing 1 - Puller e.g. Kukko 21/4 2 - Rubber band 3 - Sealing ring 4 - Housing When installing the puller A, make sure that the claws
(arrows on fig. N48-0058, page 46) engage
correctly under the sealing ring. The puller must not
be spread too wide because otherwise the seat for
the sealing ring and the housing will be damaged or
the sealing ring can jam in the housing. - Drive sealing ring out toward the top A - Puller, e.g. Kukko 21/4 B - Driver - Drive out lower ball bearing with VW 439 Page 66 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 jaws.
Illustration shows the housing in cross section for
better view.
Inner sealing ring for toothed rod, removing 1 - Puller, e.g. Kukko 21/4 2 - Rubber band 3 - Roller bearing 4 - Housing - Remove sealing ring for toothed rod from the
housing
- Disconnect hose line from valve body housing to
cylinder line
- Clean hose line, housing. Check threaded
connection for contamination (rubber residue,
chips) Page 67 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 - Before assembly, the housing must be checked for contamination (paint residue, chips, dirt) and clean
thoroughly with compressed air and alcohol if
necessary
- Check cylinder race for scoring or other damage. If scoring can be felt, replace the complete steering
gear
- Clean toothed rod (remove old grease in tooth
pockets) Page 68 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
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
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 sand paper 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 fine
grinding stone and/or sandpaper
1 - Toothed rod 2 - Sand paper (grain 350-600) Page 69 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1

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Sealing ring on toothed rod, replacing When the sealing rod is replaced it must be replaced
with a new one of the same color
Note the matching of the O-ring to the sealing ring - Press pliers together with slight pressure on the
sealing ring
- Pry out sealing ring and O-ring A - Needle nose pliers (standard commercial) O-ring 30.0 x 1.78/ white sealing ring O-ring 31.0 x 1.5/black sealing ring - Slide mounting sleeve 3315/19 onto toothed rod - Pull O-ring over the tool and insert in the groove of
the piston Page 70 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, assembling

Note: The sealing lip (arrow) of the sealing ring points
upward toward the teeth 1 on the valve body
For better viewing, the illustration shows the body
housing in cross section with installed valve body.
The valve body is shown slightly raised for better
viewing
Inner sealing rod for toothed rod, installing Lubricate the sealing rings with hydraulic oil
before installing
- Note correct installation position of the sealing ring - Place sealing ring for valve body on the tool and
drive in to stop. For installation position, see next
illustration
- Drive center roller bearing for valve body into stop The sealing lip (arrow) of sealing ring -3- points
toward cylinder -4-.
For better illustration, the drawing shows the housing
in cross section. 1 - Valve body 2 - Support ring 3 - Sealing ring 4 - Cylinder Page 71 of 99Steering12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.48.1