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

MODEL 460, 461, 463 

Fig 1: Identifying 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 columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	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	Hoist vehicle with lifting platform until wheels are free
	Lift/jack up vehicle		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 pads installed. Check that the lining thickness is such that the wear limit will not be exceeded before the next maintenance service; if necessary subject to separate repair order: ↓ Replace brake pads:
	Remove/install brake pads on fixed caliper	Model 460, 461, 463	AR42.10-P-0161GG
	Remove/install brake pad on floating brake caliper	Model 461, 463 with disk brakes on rear axle, except model 463.270 /271	AR42.10-P-0160GG
		Model 463.270 /271	AR42.10-P-0160GX
		Brake pad wear limit, disk brake	*BE42.10-P-1001-10A
4	Pull stop plug (arrows) out of test openings and measure lining thickness of brake shoes	Vehicles with drum brakes. Check that the lining thickness is such that the wear limit will not be exceeded before the next maintenance service; if necessary subject to separate repair order: ↓
		Replace drum brake shoes.	AR42.10-P-0165GG
		Brake lining wear limit, drum brake	*BE42.10-P-1002-10A
	Checking
5	Check condition of the brake disks	Check for score marks, cracks and burn marks. Hairline cracks can occur due to high stress. The brake disks only need to be replaced if the cracks exceed a length of 25 mm. With open cracks and score marks deeper than 0.5 mm, subject to separate repair order: ↓ Replace brake disks:
	Remove/install front axle brake disk	Model 460, 461, model 463 except model 463.270 /271	AR42.10-P-0220GG
	Remove/install rear axle brake disc	Model 461, model 463 except model 463.270 /271	AR42.10-P-0240GG
	Remove/install brake disk on front and rear axle	Model 463.270 /271	AR42.10-P-0220GX
6	Check brake disks for axial runout	If necessary.
	Check brake disks for axial runout		AR42.10-P-0265GG
	Measure
7	Measure brake disk thickness using vernier caliper	Check that the disk thickness is such that the wear limit will not be exceeded before the next brake pad change; if necessary subject to separate repair order: ↓ Replace brake disks:
	Remove/install front axle brake disk	Model 460, 461, model 463 except model 463.270 /271	AR42.10-P-0220GG
	Remove/install rear axle brake disc	Model 461, model 463 except model 463.270 /271	AR42.10-P-0240GG
	Remove/install brake disk on front and rear axle	Model 463.270 /271	AR42.10-P-0220GX
		Front axle brake disk thickness	*BE42.10-P-1001-08C
		Rear axle brake disk thickness	*BE42.10-P-1001-09C
		Vernier caliper	Fig 2
8	Install in the reverse order

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
BE42.10-P-1002-10A	Brake lining wear limit, drum brake		mm	3.5

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-1001-08C	Brake disk thickness	New	mm	16	30	32
		Wear limit	mm	13	27	29, 5
		Wear limit for maintenance service	mm	13, 6	27, 6	30, 1

TEST VALUES FOR REAR BRAKE DISKS

Number	Designation			Models 461, 463 except 463.270/271	Model 463.270/271
BE42.10-P-1001-09C	Brake disk thickness	New	mm	16	22
		Wear limit	mm	14	19.5

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

Courtesy of MERCEDES-BENZ USA