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Mercedes Benz Truck Sprinter 2500 Crew (906.733) V6-3.0L DSL Turbo (642.898) Technical Service Bulletin # LI42-10_N-048723 Date: 100204


Brakes - Rear Brake Grind Noise



Grinding noise at rear axle brake



Topic number LI42.10-N-048723



Version 1



Design group 42.10 Service brake



Date 02-04-2010



Validity Model 906.# 5



Reason for change



Reason for block



Complaint:



Grinding noise at rear axle brake.



2010 Mercedes Benz Truck Sprinter 2500 Crew (906.733) V6-3.0L DSL Turbo (642.898)



Page 85



Cause:



1. Sluggish brake caliper guide.



2. Dirt reaches the running surface of the brake piston due to a defective piston boot. The brake piston cannot return to its starting position.



Remedy:



1. Check boots of guide pins in brake caliper support for correct seating.



2. Check boots of guide pins for leaks.



Pull out the guide pins, the boot should sink in due to the vacuum.



3. Guide pins must be able to move freely.



4. Check brake piston boot for damage.



If tests 1-3 are not passed, replace brake caliper support.



If test 4 is not passed, replace brake caliper.



Note:



When replacing the brake pads, make sure that the piston boots are folded back properly otherwise they will be damaged when the brake caliper

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