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Home >> Mercedes Benz >> 2008 >> G55 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes -- Testing & Repair -- G-Class (463) >> Testing & Repair >> Repairing fixed caliper on front axle - AR42.10-P-0150GG

Repairing fixed caliper on front axle - AR42.10-P-0150GG

MODEL 460, 461, 463 

Fig 1: Removing Piston With Piston-Rotating Pliers
G07741631Courtesy of MERCEDES-BENZ USA
REMOVING Removing     
DANGER Risk of poisoning  caused by swallowing brake fluid. Risk of injury  caused by brake fluid coming into contact with skin and eyes. Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. AS42.50-Z-0001-01A
NOTES Notes on repairs to brake system   AH42.00-P-0003-01A
NOTES Brake fluid notes   AH42.50-P-0001-01A
1 Remove fixed caliper NOTES The fixed brake caliper must not be separated into its halves, because this will result in function impairments or a failure to the brake system. AR42.10-P-0105GG 
DISASSEMBLINGASSEMBLING Disassemble/assemble     
2 Pry off dust cap (45) IMPORTANTInstallation:  Use pliers (026) and suitable plates (027).  
MPECIAL TOOL Fig 2
3 Insert the metal segment (040) into the fixed brake caliper, and then carefully press out the piston (47) as far as the stop using compressed air IMPORTANT A section of the brake disc can be used as the metal segment (040).  
4 Remove piston (47) with piston-rotating pliers (020) MPECIAL TOOL Fig 3
5 Check piston (47) and bore in the fixed brake caliper for damage, replace fixed brake caliper if necessary Test values for front wheel fixed caliper *BE42.10-P-1001-01E 
NOTES Notes if piston or cylinder bore are damaged on fixed or floating caliper   AH42.10-P-9406-03A
6 Remove piston seal (50) from groove in cylinder bore. IMPORTANTInstallation:  Rub the new piston seal (50) with brake fluid.  
7 Assemble in the reverse order    
INSTALLING Install     
8 Install fixed brake caliper   AR42.10-P-0105GG 
TEST VALUES FOR FRONT WHEEL FIXED CALIPER

Number Designation Model 460, 461, model 463.200/204/ 209/220/221/ 232/233/224/ 225/244/250/ 304/306/307/ 322/324/325/ 327/328/336 Model 463.202/206/ 207/208/222/ 227/228/230/ 231/236/237/ 240/241/243/ 245/246/247/ 248/249/254/ 300/303/308/ 309/320/321/ 323/330/331/ 332/333/340/ 341/346
BE42.10-P-1001-01E 4-piston fixed caliper, front axle Housing dia. new Down mm 44 44
Top mm 44 44
Channel width   mm 149, 8 (+0, 3) 149, 8 (+0, 3)
Brake disk diameter   mm 303 315
Brake disk thickness   mm 16 30
Fig 2: Identifying Pliers (000 589 49 37 00)
G07741632Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Pliers (000 589 50 37 00)
G07741633Courtesy of MERCEDES-BENZ USA