Check lining thickness of brake pads and condition of brake disks - AP42.10-P-4251G

MODEL 460, 461, 463 

Fig 1: Checking Lining Thickness Of Brake Pads And Condition Of Brake Disks

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury.  Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
1	Hoist vehicle with lifting platform until wheels are free
			AR00.60-P-1000G
2	Remove wheel-and-tire assembly	Vehicles with drum brakes: Only detach complete wheels of front axle.	AP40.10-P-4050G
	Measure
3	Lining thickness of brake pads using vernier caliper	Brake pad wear limit, disk brake Make sure that the brake pad thickness is such that the wear limit will not be exceeded before the next maintenance service: ↓ If necessary, replace the brake pads subject to a separate repair order.	*BE42.10-P-1001-10A
4	Pull stop plug (arrows) out of test openings and measure lining thickness of brake shoes	Brake lining wear limit, drum brake Vehicles with drum brakes. Make sure that the wear limit will not be exceeded before the next maintenance service: ↓ If necessary, replace the brake shoes of the drum brakes subject to a separate repair order.	*BE42.10-P-1002-10A
	Check
5	Check condition of the brake disks	The brake disks do not need to be replaced. If the crack length is max. 25 mm. The brake disks must be replaced. If cracks and score marks have split open and are deeper than 0.5 mm. Check for score marks, cracks and burn marks. Hairline cracks can occur due to high stress.
6	Check brake disks for axial runout
	Check brake disks for axial runout		AR42.10-P-0265GG
		If necessary.
	Measure
7	Measure brake disk thickness using vernier caliper	Front axle brake disk thickness	*BE42.10-P-1001-08C
		Rear axle brake disk thickness	*BE42.10-P-1001-09C
		Caliper gauge Make sure that the wear limit will not be exceeded before the next brake pad change: ↓ If necessary, replace the brake disks subject to a separate repair order.	Fig 2
8	Install in the reverse order

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			MODEL 460, 461, 463 (except 463.270/271/272/273/274) without internally vented brake disks	MODEL 461 with internally vented brake disks
BE42.10-P-1001-08C	Brake disk thickness	New	mm	16	30
		Wear limit	mm	13	27

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			MODEL 463 (except 463.270/271/272/273/274) with internally vented brake disks	Model 463.270/271
BE42.10-P-1001-08C	Brake disk thickness	New	mm	30	32
		Wear limit	mm	27	29, 5

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			MODEL 463.272/273/274
BE42.10-P-1001-08C	Brake disk thickness	New	mm	36
		Wear limit	mm	34

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			MODEL 461, 463 (except 463.270/271/272/273/274)	MODEL 463.270/271
BE42.10-P-1001-09C	Brake disk thickness	New	mm	16	22
		Wear limit	mm	14	19, 5

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			MODEL 463.272/273/274
BE42.10-P-1001-09C	Brake disk thickness	New	mm	22
		Wear limit	mm	20

TEST VALUES FOR SERVICE BRAKE

Number	Designation			MODEL 460, 461, 463
BE42.10-P-1001-10A	Brake pad wear limit, disk brake	Front axle	mm	2, 0
		Rear axle	mm	2, 0

TEST VALUES FOR SERVICE BRAKE

Number	Designation		MODEL 460, 461, 463
BE42.10-P-1002-10A	Brake lining wear limit, drum brake	mm	3, 5

Fig 2: Identifying Caliper Gauge (140 589 00 19 00)

Courtesy of MERCEDES-BENZ USA