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2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898) Technical Service Bulletin # LI27-00_N-048696 Date: 100122


A/T - Oil Loss In Electrical Connection And Oil Pan Gasket Area



Automatic transmission oil loss in area of electrical connection and oil pan gasket



Topic number LI27.00-N-048696



Version 1



Design group 27.00 General



Date 01-22-2010



2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898) Page 98



Validity Transmission 722.6



Reason for change



Reason for block



Complaint:



Automatic transmission oil loss in the area of the electrical connection and oil pan gasket and/or in the wiring harness.



Different remedial action is necessary based on the type of complaint (a or b).



a) Transmission oil loss in area of pilot bushing, oil pan



b) There is transmission oil in the wiring harness.



Cause:



The following causes may apply and require different repair methods:



a) Due to insufficient sealing of the large O-ring of the pilot bushing outwards, transmission oil has distributed itself in the area of the plug/oil pan



gasket.



b) Due to insufficient sealing of the small O-ring of the pilot bushing, there is transmission oil in the wiring harness.



Remedy:



Carry out remedies according to the complaint:



a) Clean the transmission in the affected area, spray with leak detector spray and perform road test. If no oil escape can be detected after the road test



or can only be detected in the area of the pilot bushing, only replace the pilot bushing. Use damage code 27270 04.



b) !!!!Procedure modified !!!!



Replace pilot bushing with seal rings.



The conductor plate is not the cause of leakage complaints at the pilot bushing and must not be replaced on these grounds.



Allow the wiring harness to drip and blow out the plugs at the transmission end and control unit end with compressed air. In addition the control unit



contacts must be blown dry.



The contacts can then be sprayed lightly with commercially available contact spray. Use damage code 27270 04.



Notes:



In the course of the production and inspection processes, the pilot bushing is coated with oil. Because of this, oil from manufacture can therefore



enter the pilot bushing and form a small puddle (see attachment). However, a larger quantity of oil should not flow out of the pilot bushing when the



pilot bushing (at the wiring harness end) is pulled. If this is the case, the pilot bushing must be replaced.



When connecting the wiring harness to the transmission, make sure that the wiring harness is routed free of tension.



No tensile forces may be transferred to the plug by the wiring harness. Increase outer cable length if necessary (no reason to replace a wiring



harness). The pictures in the attachment show examples of bad (Figure 2) and good (Figure 1) routing.



2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)



Page 99



2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)



Page 100



2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)



Page 101



2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)



Page 102



2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)



Page 103



2010 Mercedes Benz Truck Sprinter 3500 Cab (906.153) V6-3.0L DSL Turbo (642.898)



Page 104



The pilot bushing may only be disassembled/assembled at transmission oil temperatures below 50 锟斤拷C in order to avoid damaging the electrical

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