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Home >> Mercedes Benz >> 2012 >> G550 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes -- Testing & Repair -- G-Class (463) >> Testing & Repair >> Check brake disks for axial runout - AR42.10-P-0265GG

Check brake disks for axial runout - AR42.10-P-0265GG

MODEL 460, 461, 463 

Fig 1: Checking Brake Disks For Axial Runout
G07741670Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
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 wheel.    
REFER TO MAINTENANCE Remove/install wheels, rotate if necessary   AP40.10-P-4050G
INSPECT Checking     
2 Check condition of brake disk IMPORTANT Do not check worn brake disk for axial runout, replace brake disk.  
REFER TO MAINTENANCE Check lining thickness of brake pads and condition of brake disks   AP42.10-P-4251G
3 Push back brake pads    
4 Check wheel bearing play and adjust if necessary Except for model 461.331, 463.270/271 AR33.20-P-0300GG
Model 461.331, 463.270/271 AR33.20-P-0300GX
5 Secure dial indicator with dial indicator holder to wheel carrier and align. MPECIAL TOOL Fig 2
MPECIAL TOOL Fig 3
6 Slowly turn brake disk by hand and read off axial runout at dial indicator. Test values for front axle brake disk. *BE42.10-P-1002-08C 
Test values for rear axle brake disk *BE42.10-P-1002-09C 
7 Install in the reverse order    
DANGER Risk of accident  when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work Before starting engine, actuate brake pedal several times until the pressure is built up and maintained in the brake system. AS42.50-Z-0002-01A
8 Push down brake pedal several times IMPORTANT Firm resistance should be noticeable at the brake pedal.  
TEST VALUES FOR FRONT BRAKE DISKS

Number Designation Model 460, 461, 463 without internally ventilated brake disks Model 463 with internally ventilated brake disks, except model 463.270/271 Model 463.270/271
BE42.10-P-1002-08C Permissible axial runout of brake disc mm 0.1 0.15 0.1
TEST VALUES FOR REAR BRAKE DISKS

Number Designation Models 461, 463 except 463.270/271 Model 463.270/271
BE42.10-P-1002-09C Permissible axial runout of brake disc mm 0.1 0.1
Fig 2: Identifying Dial Indicator Holder (363 589 02 21 00)
G07741671Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Dial Indicator (001 589 53 21 00)
G07741672Courtesy of MERCEDES-BENZ USA