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Inspect condition of brake disks - AP42.10-P-4258SX

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MODEL 216 

MODEL 221.0/1 

Fig 1: Inspecting Brake Disks Condition
G10038104Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. AS00.00-Z-0010-01A
DANGER Risk of injury  to skin and eyes caused by handling hot or glowing objects. Wear safety gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
1 Remove wheels   AP40.10-P-4050SX
INSPECT Checking     
2 Check brake disks (1) at front and rear axle IMPORTANT Inspect for scores and cracks. Hairline cracks can occur due to high stress.
IMPORTANT Brake disks (1) do not have to be replaced when the crack length (2) is a maximum of 25 mm.
With perforated brake disks or those provided with sunk holes (1) measure the crack length (2) including the bore diameter.
With gaping cracks and score marks deeper than 0.5 mm replace brake disks (1).		  
Remove/install brake disc Model 216 with engine 156, 273, 275, model 221 with engine 156, 272, 273, 275, 629, 642
Model 216 with engine 157, 278, model 221 with engine 157, 276, 278, 651		 AR42.10-P-0220SX
3 Remove brake pads Vehicles with fixed brake caliper AR42.10-P-0161SX
Vehicles with floating brake caliper AR42.10-P-0160SX
MEASURING Measure     
4 Measure brake disk thickness on front and rear axle using SPECIAL TOOL caliper gage (012) IMPORTANT Observe recommended limit dimensions, so that the wear limit is not dropped below until the next maintenance service, if necessary replace brake disks (1).  
Remove/install brake disc Model 216 with engine 156, 273, 275, model 221 with engine 156, 272, 273, 275, 629, 642
Model 216 with engine 157, 278, model 221 with engine 157, 276, 278, 651		 AR42.10-P-0220SX
Test values for front brake disks *BE42.10-P-1001-08O 
Test values for rear brake disks *BE42.10-P-1001-09M 
SPECIAL TOOL Vernier caliper Figure
5 Install in the reverse order    
TEST VALUES FOR FRONT BRAKE DISKS

Number Designation Model 216.371/386, Model 216.373/376/394 with code 494/498/625 Model 216.373/376/394 without code 494/498/625 Model 216.374/377/379
BE42.10-P-1001-08O Brake disk thickness New mm 32 36 36
Wear limit mm 30 34 33.4
Wear limit for maintenance service  mm 30.5 34.5 34
TEST VALUES FOR FRONT BRAKE DISKS

Number Designation Model 221.003/022/026/028/054/056/057/070/071/080/082/083/084/086/087/095/103/122/126/154/156/157/170/171/180/182/183/184/186/187/195, Model 221.073/094/173/176/194 with code 494/498/625/951/950+ (498/625), Model 221.128 without code Z07
BE42.10-P-1001-08O Brake disk thickness New mm 32
Wear limit mm 30
Wear limit for maintenance service  mm 30.5
TEST VALUES FOR FRONT BRAKE DISKS

Number Designation Model 221.073/094/173/176/194 with code 950, Model 221.073/094/173/194 without code 494/498/625/951/950+ (498/625), Model 221.176 without code 494/498/625
BE42.10-P-1001-08O Brake disk thickness New mm 36
Wear limit mm 34
Wear limit for maintenance service  mm 34.5
TEST VALUES FOR FRONT BRAKE DISKS

Number Designation Model 221.074/174/077/177/179, Model 221.128/176 with code Z07/Z07+Z19
BE42.10-P-1001-08O Brake disk thickness New mm 36
Wear limit mm 33.4
Wear limit for maintenance service  mm 34
TEST VALUES FOR REAR BRAKE DISKS

Number Designation Model 216.371 with code 494/498/625 Model 216.373/386/394, model 216.371 without code 494/498/625, Model 216.376 with code 494/498/625 Model 216.374/377/379, Model 216.376 without code 494/498/625
BE42.10-P-1001-09M Brake disk thickness New mm 12 24 26
Wear limit mm 10 21.4 23.4
Wear limit for maintenance service  mm 10.5 22 24
TEST VALUES FOR REAR BRAKE DISKS

Number Designation Model 221.022/080/087/095/122/180/187/195, model 221.003/103 without code 950, model 221.026/126 with code 625, model 221.070/071/170/171 with code 494/498/625, model 221.054/056/154/156 up to chassis: 293228, model 221.056/156 with code 498/625 Model 221.028/073/084/086/094/173/184/186/194, model 221.003/026/083/103/126/183 with code 950, model 221.054/056/057/082/154/156/157/182 with code 950/951, model 221.070/071/170/171 without code 494/498/625, model 221.128 without code Z07, model 221.176 with code 494/498/625/951/950+ (4 98/625)
BE42.10-P-1001-09M Brake disk thickness New mm 12 24
Wear limit mm 10 21.4
Wear limit for maintenance service  mm 10.5 22
TEST VALUES FOR REAR BRAKE DISKS

Number Designation Model 221.026/126 without code 625/950, model 221.057/082/157/182 without code 950/951, model 221.083/183 without code 950, model 221.054/056/154/156 as of chassis: 293229 Model 221.074/077/174/177/179, model 221.128 with code Z07, model 221.176 without code 494/498/625, model 221.176 with code Z07/Z07+Z19, model 221.176 with code 950
BE42.10-P-1001-09M Brake disk thickness New mm 22 26
Wear limit mm 19.4 23.4
Wear limit for maintenance service  mm 20 24
Fig 2: Identifying Vernier Caliper (140 589 00 19 00)
G10038105Courtesy of MERCEDES-BENZ USA
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