SB-2030348-3

Technical product information 2030348/3
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Technical product information
Topic
New Continental GT and GTC steering shimmy/vibration-21 Inch wheels only
Market area
Russische Federation (5RU) ,China 796 VW Import Comp . Ltd (Vico) , Beijing
(6796),Russian Federation 935 Volkswagen Group RUS (6935) ,United Kingdom E01
Bentley UK (6E01 ),Germany E02 Bentley rest Europe (6E02) ,Japan E03 Bentley
Japan (6E03) ,Australia E04 Bentley rest Asia and Australia (6E04) ,United States E05
Bentley USA and rest America (6E05)
Brand
Bentley
Transaction
2030348/3
No.
Level
EH
Status
Draft
Release
date
New customer code
Object of complaint
Complaint type
Position
Running gear-> Wheels, tyres, tyre pressure monitoring - visual appeal I surface -> >not
> Tyres -> Tyre tread
bump
specified<
Running gear-> Steering, power-assisted steering ->
Steer
Noise, vibrat ion->
vibrate
Running gear-> Steering system
functionality
Running gear-> Steering system
Noise, vibration
Running gear-> Steering , power-assisted steering
functionality
New workshop code
Object of complaint
Complaint type
Position
Running gear-> Wheels, tyres, tyre pressure
monitoring -> Tyres
component I consumables ->
unbalanced
rear right
Running gear-> Wheels, tyres, tyre pressure
monitoring -> Tyres
component I consumables ->
unbalanced
front
right
Running gear-> Wheels, tyres, tyre pressure
monitoring -> Tyres
component I consumables ->
unbalanced
front left
Running gear-> Wheels, tyres , tyre pressure
monitoring -> Tyres
component I consumables ->
unbalanced
rear left
Running gear-> Steering system -> Steering gear
Noise, vibration -> noise
Vehicle data
New Continental GT and GTC
Sales types
Type MY
Brand Designation Engine code Gearbox code Final drive code
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Chassis numbers
Manufacturer Filler Type Filler
MY
Factory From
c
c
SCB
*
3W
*
*
SCB
*
ZA
*
*
To
Prod from Prod to
Documents
Document name
master.xml
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Technical product information
Transaction No. : 2030348/3
New Continental GT and GTC steeri ng shimmy/vibration-21 Inch wheels
only
Customer statement I workshop findings
This TPI is only applicable to New Continental GT and GTC vehicles fitted with 21 Inch wheels. This
TPI is not applicable to vehicles fitted with 20 inch wheels. should 20 inch wheels be fitted please
raise a DISS ticket.
This TPI also applies to all vehicles which are built and registered for use in the following countries
listed below:
EGYPT - INDIA - LEBANON - SYRIA - SOUTH AFRICA
Should a customer complain of steering wheel shimmy/vibration constantly above 80 kph/50 mph and
the condition does not improve when driven please proceed with this TPI, should the vehicle exhibit
different symptoms other than described please raise a DISS ticket.
Should this be the first time the vehicle has been to your Dealership for steering shimmy/vibration
issues please carry out Section 1 only.
In the event the vehicle is returning back to your Dealership with the same steering wheel/shimmy
issue please carry out Sections 1 and 2.
NOTE If conducting Sections 1 and 2 it is not a requirement to carry out the road test in Section 1
procedure4
Technical background
We are aware that under certain conditions of shipment and storage, particularly involving large
changes in ambient temperature , cond ition can occur where the tread surface of the tyre forming the
footprint on the road surface or container floor partly reta ins the relatively flat form when driven and
does not immediately restore to a constant radius. Hence the name of flat spotting which is generally
given to this condition.
It should not be confused with out of balance, out of round or radial force variation. It is very important
that the diagnosis and correction of these different cond itions are not confused with each
other. Attempting to correct flat spotting by rebalancing the assembly will not correct the problem and
worse still, when the flat spots are removed the tyres will then be out of balance.
The Measure section of this TPI describes the procedure wh ich should be followed to determine the
root cause of the steering shimmy/vibration .
ATTENTION: Du ring this TPI the workshop manual is quoted to help in carrying out various tasks , it
is recommended that the procedures referenced are checked by the operative as the process within
the workshop manual may have changed since last viewed .·
Production change
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Improved shipping , transportation and prqduction procedures have been introduced.
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IMPORTANT INFORMATION
Right Hand Drive
the latest level higher friction steering rack and updated
From VIN SCBFE63WXCC
servotronic control units were fitted
Left Hand Drive
From VIN SCBFR7ZA3CC
servotronic control units were fitted
latest level higher friction steering rack and updated
Right and Left Hand Drive
From VIN SCBFN63W8DC
time of production
latest specification wheel bearing housings were fitted at the
Measure
Section 1
IMPORTANT: Do Not initially balance the wheel and tyre assemblies
- Check all wheels and tyres for damage
- Check that Bentley 21 inch approved wheels are fitted and the tyres are to the correct specification
- Check the front and rear suspension for any damage and wear
- Check all steering components for damage and wear
1. Ensure the tyres are set at Normal pressure and adjust if required, drive the car until the flat spots
come out or the flat spotting condition improves, then drive for approximately 10 minutes at the lowest
speed possible to allow cooling
- Within a maximum of two minutes of returning from the road test , raise the vehicle off the ground
2. Remove all four wheel assemblies Refer to Workshop manual Rep.Gr 44
3. Using the Hunter GSP 9712 (VAS 6230) vibration control balancer (or similar) force match and
balance all four assemblies, the assembly Rad ial Force Variation (RFV) should not exceed 85N after
the force matching process has been conducted.
- To seat the tyre beads to the rim inflate to 3.5 Bar, once satisfied that the tyre beads are fully seated
readjust to the correct measuring pressure of 3.0 Bar - Refer to Workshop manual Rep.Gr 44 and
also observe the following key points
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Does the vehicle have accessory valve caps fitted as shown in Figure 1? If Yes please ensure the
force match and balance process is always conducted with the accessory valve caps fitted.
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Figure 1
IMPORTANT: Apply a thin smear of silicon based grease for example Dow Corning high vacuum
grease to the external threads of the valve stem prior to fitting the accessory valve cap. Grease
should be applied any time the cap is removed and the grease is not evident
- For Hunter GSP 9712 (or similar) use the White faced adaptor cone with identification code 154 F+
shown in Figure 2, NOTE: If your Workshop does not have this particular adaptor please contact your
local Hunter representative .
- The cone must be fitted on the spindle as shown in Figure 3 ensuring the White face of the cone is
facing towards the end of the spindle
IMPORTANT NOTE: Should the initial RFV reading be above 85 N this does not necessarily mean
the assembly cannot be adjusted to within the specified tolerance, please ensure that the force
matching process is adhered to as instructed within the workshop manual Rep.Gr 44 - Tyres checking condition and replacement.
All four tyres must not exceed 85N after force matching and balancing should this not be achievable
replace the applicable tyres - Refer to Workshop manual Rep .Gr 44
Figure 2
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Figure 3
IMPORTANT: When conducting the wheel and tyre force matching process or should the tyres
require replacing, a specific tyre fitting lubricant should be used. The lubricant is Rema Tip Top Anti
Gliss Lube with the Bentley Part Number of RH 14530. On drying the Anti Gliss has adhesive
properties that increases friction between the tyre and wheel rim to prevent slippage. Please Refer to
Workshop manual Rep.Gr 44 Tyres - Checking Condition and Replacement - Radial force variation Best fit practice.
- The assembly high spot is identified with a brown dash (Figure 4).
Figure 4
- Rotate the assembly on the spindle until the high point is at 12 o'clock and the Brown dash turns to
Green (Figure 5).
Figure 5
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- Mark the RFV high point with a paint pen or similar (Figure 6) this will be required when refitting the
wheels as detailed within the Workshop manual Rep .Gr 44 Tyres - Checking Condition and
Replacement - Radial force variation - Best fit practice
Figure 6
4. Carry out a road test and reassess. Should the steering shimmy/vibration condition not
improve please complete Section 2.
Section 2
1. Remove and discard the original front left and right hand side wheel bearing housing (Figure
7 point A) and replace with 3WO 407 245A - left hand front and 3WO 407 246A - right hand
front - Refer to workshop manual Rep.Gr 40 Front suspension , Drive shafts
Figure 7
- Fit new front hub bearing assemblies and fixings (Figure 7 point 8) - Refer to workshop
manual Rep.Gr 40
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Have the steering rack and servotronic control unit been previously replaced using the latest
specification parts? Or fitted at the time ofproduction? (See Production change section of this
TPI for VIN information)
Please also look for the Blue paint completion mark as shown in Figure 8 (for steering rack)
and Figure 10 for (servotronic control unit),also check "Repair history" (in Elsa pro) should it be
e vident that the rack and servotronic control unit have not been previously replaced proceed
from procedure 2, should it be evident the rack and servotronic have been replaced go to
procedure 5
2. Replace the steering rack - Refer to Workshop manual Rep.Gr 48
3. Place a small blue paint completion mark on the power steering reservoir as shown in Figure 8 to
confirm the steering rack has been replaced.
Figure 8
4. Ensure the ignition is switched off then remove the UH boot panel and locate the servotronic
control unit (Figure 9)
Figure 9
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- Remove and discard the original control unit
- Fit the replacement servotronic control unit with part number 3WO 907 307L
- Place a Blue paint completion mark on the new servotronic control unit to confirm the unit has been
replaced (Figure 10)
Figure 10
- Place a Yellow paint completion mark on the Right and Left hand wheel bearing housing as shown
in Figure 11 to confirm replacement
Figure 11
5. Refit all four road wheels, Refer to Workshop manual Rep.Gr 44 Tyres - Checking Condition and
Replacement - Radial force variation - Best fit practice
6. Carry out a full geometry check and adjust as required - Refer to workshop manual - Rep.Gr 44
Wheels , tyres. axle align
7. Road test the veh icle and reassess
NOTE: Should the condition still be evident please raise a DISS ticket and wait for further instruction
from TSC before commencing with any other work.
Warranty accounting instructions
Please Note: Normal Warranty policies are applicable.
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Time to carry out the initial flat spot recovery process and force match and balance all four
assemblies
Warranty Type
91Oor110
Labour operation code
44 40 94 00 (Use 44 40 94 99 for New GTC only)
Damage Service Number
44 40
Damage code
00 13
Time
Shop Time
Time to replace steering rack.
Warranty Type
910 or 110
Labour operation code
48 40 19 00
Damage Service Number
48 40
Damage Code
00 13
Time
270 Time units
Time to replace the Left and Right hand wheel bearing housings and Wheel bearings
Warranty Type
910 or 110
Labour operation code
40 50 56 00
Damage Service Number
40 50
Damage Code
00 13
Time
370 Time units
Time to replace servotronic control unit
Warranty Type
910 or 110
Labour operation code
48 69 19 00
Damage Service Number
48 69
Damage Code
00 13
Time
10 Time units
Time to check and set the vehicle geometry without ACC
Warranty Type
910 or 110
Labour operation code
44 95 03 00
Damage Service Number
44 95
Damage Code
00 13
Time
80 Time units
Time to check and set the vehicle geometry with ACC
Warranty Type
910or110
Labour operation code
44 95 03 10
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Damage Service Number
44 95
Damage Code
00 13
Time
150 Time units
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Parts information
Description
Part Number
Quantity
Steering Rack (LHD)
3W1422061D
1
Steering Rack (RHD) 3W2 422 061D
1
Servotronic control
unit
3WO 907 307L
1
Left front wheel
bearing housing
3WO 407 245A
1
Right front wheel
bearing housing
3WO 407 246A
1
Wheel hub bearings
3WO 407 613E 2
Hub bolt
8EO 407 643A
2
Hub carrier fixings
WHT 000 237
8
Bolt
N10 211 202
2
Bolt
N10 625 601
1
Steering column bolt
N10 518 404
1
Bolt
N90 966 002
2
Lock screw
WHT 001 480
2
Nut
N10 272 302
2
Nut
N90 892 302
2
Bolt
N10 491 802
2
Washer
N10 406 105
2
Steering fluid
JNV 862 564F
2 Litres
Seal washer
N01 384 94
2
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Seal washer
N01 384 86
2
Anti Gliss
RH 14530
1 x 500 Gram tin can be used for multiple
applications
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(]]
Should tyres be required, please ensure the new tyres are of the correct specification as detailed
within the Workshop Manual Rep.Gr 44 - Tyres - Checking Condition and Replacement
Customer information
The customer may notice an initial difference in the feel of the steering, however this is normal , the
difference is due to the fitment of the latest level higher friction steering rack.
Bentley branded Tyre Cradles are available as an approved accessory.
The tyre cradles have been designed and manufactured specifically for Bentley providing simple and
effective tyre protection.
Tyre flat spotting can be caused by medium to long term storage or from parking after a long drive,
especially where the tyre experiences large changes in temperature.
To prevent flat spotting , tyres need to be cooled in a controlled manner to enable the tyre to restore to
a constant radius.
Made from a unique polymer that moulds to the shape of the tyre the new Bentley Tyre Cradles
maintain the tyre shape whilst cooling and in storage.
The tyre cradles are easy to use, simply drive the car onto them in the desired parking area.
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