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2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI46-20_P-0517672 Date: 111129

2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI46-20_P-0517672 Date: 111129



2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 57



Steering - Leak In Input Shaft Area Of Steering Gear



Steering leaking in area of input shaft, below protective cap



Topic number LI46.20-P-051767



Version 2



Design group 46.20 Steering gear



Date 11-29-2011



Validity Model 164 except CODE (213) Speed-sensitive power steering



Model 251 except CODE (213) Speed-sensitive power steering



Reason for change Exception for toe checking / adjusting



Complaint:



Steering leaking in area of input shaft, below protective cap.



This complaint only affects steering gears with the following part numbers:



A164 460 01 00



A164 460 05 00



A251 460 02 00



A251 460 07 00



The repair method described below may only be used on these part numbers.



Cause:



Wear on upper radial shaft sealing ring in control head



Remedy:



NOTE:



It is not necessary to replace the entire steering gear!!!



Replace control head complete, replacing the lower radial shaft sealing ring in the steering gear housing at the same time.



Procedure:



1. Remove steering, as per AR46.20-P-0600GZ



2. Detach control head and replace lower radial shaft sealing ring in steering gear housing, as per AR46.20-P-0003Q, valid for models 203/209



Note:



The work instructions AR46.20-P-0003Q "Replace lower radial shaft sealing ring at control head" is currently being expanded for models



164/251 and will be published in WIS shortly. Follow all the operation steps as for models 203/209, and use the torque specifications of



these models. This also applies for the operation number with text (46-4216).



3. Install new control head according to parts listing, as per AR46.20-P-0003Q, valid for models 203/209



4. Adjust play between thrust piece and steering rack, as per AR46.20-P-0601TX



5. Install steering, as per AR46.20-P-0600GZ



6. Check function of steering



Note:



For this repair the front toe need to be checked / adjusted when necessary.



2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 58

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