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Home >> Mercedes Benz >> 2012 >> G550 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes -- Testing & Repair -- G-Class (463) >> Testing & Repair >> Remove/install rear axle brake caliper - AR42.10-P-0080AA

Remove/install rear axle brake caliper - AR42.10-P-0080AA

MODEL 461 with disk brakes on rear axle 

MODEL 463 (except 463.270 /271) with disk brakes on rear axle 

Fig 1: Identifying Brake Hose, Brake Caliper And Microencapsulated Guide Pins
G07741622Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Brake Piston, Dust Cap And Caliper Support
G07741623Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
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
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
NOTES Brake fluid notes   AH42.50-P-0001-01A
NOTES Notes on repairs to brake system   AH42.00-P-0003-01A
1 Remove wheel.    
REFER TO MAINTENANCE Remove/install wheels, rotate if necessary   AP40.10-P-4050G
2 Remove brake hose (1) from brake caliper (2) IMPORTANT Seal off connections immediately using plugs to prevent the brake fluid reservoir running empty.  
TORQUE SPECIFICATION *BA42.10-P-1005-04B 
MPECIAL TOOL Fig 4
MPECIAL TOOL Fig 3
3 Detach brake caliper (2) from brake caliper support (6) IMPORTANTInstallation:  Replace microencapsulated guide pins (3).  
TORQUE SPECIFICATION *BA42.10-P-1002-17B 
4 Remove contact sensor for brake wear indicator If installed  
TORQUE SPECIFICATION *BA42.10-P-1004-17B 
5 Press back brake piston using resetting device (4) IMPORTANT Collect brake fluid in a suitable container.  
MPECIAL TOOL Fig 5
6 Clean brake caliper (2) using brake caliper brush MPECIAL TOOL Fig 6
INSPECT Checking     
7 Check brake caliper (2) for brake fluid escaping from the brake piston (4) IMPORTANT Replace brake caliper (2) when leaking.  
8 Check dust cap (5) for damage IMPORTANT Replace dust cap (5) if damaged.  
9 Install in the reverse order    
10 Bleed brake system   AR42.10-P-0010GG 
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
11 Press brake pedal several times and check brake system for leaks IMPORTANT Firm resistance should be noticeable at the brake pedal. AR42.10-P-0100-01A 
12 Check fluid level in the brake fluid reservoir, correct if necessary    
REFER TO MAINTENANCE Hydraulic brake system - check fluid level, correct if necessary   AP42.50-P-4210G
BRAKE LINES, BRAKE HOSES

Number Designation Model 461 Model 463 except model 463.270/271
BA42.10-P-1005-04B Brake hose to rear axle floating caliper Nm 18 18
REAR AXLE FLOATING BRAKE CALIPER

Number Designation Model 461, 463 except model 463.270/271
BA42.10-P-1002-17B Guide pin on caliper support Nm 30
BA42.10-P-1004-17B Self-locking bolt, brake pad wear sensor to floating caliper Nm 30
Fig 3: Identifying Box Wrench Bit (000 589 75 03 00)
G07741624Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Torque Wrench (001 589 72 21 00)
G07741625Courtesy of MERCEDES-BENZ USA
Fig 5: Identifying Pusher Tool (000 589 52 43 00)
G07741626Courtesy of MERCEDES-BENZ USA
Fig 6: Identifying Brake Caliper Brush (000 589 26 68 00)
G07741627Courtesy of MERCEDES-BENZ USA