Replace tires - AR40.10-P-1030MCU

MODEL 451.3/4

Fig 1: Tire Replacement Components

Courtesy of MERCEDES-BENZ USA

	Detaching
	Information on tires/rims		AH40.10-P-9411-01MCU
1	Unscrew valve protective cap (3) from valve (1) and unscrew valve element from the valve (1)
2	Remove wheel balance weights
3	Position bead breaker shovel of tire mounting device on the tire bead
4	Pry off the tire on the inside and outside over the safety hump of the disc wheel.
5	Clamp disc wheel on the tire mounting device
6	Align mounting head at a small distance (X, Y) to the disk wheel and fix in position
7	Position disk wheel so that valve (1) is approx. 10 cm in front of mounting head looking in the direction of rotation
8	Using an assembly lever, lever the tire bead over the assembly lug of the tire mounting device and pull off tire
9	Checking condition of rim	If damaged, replace disk wheel.
10	Unscrew nut (2) on valve (1) and remove wheel sensor (A69/1, A69/2, A69/3, A69/4) downwards
11	Remove seal ring (4) and sleeve (5) and pull valve (1) out of the wheel sensor (A69/1, A69/2, A69/3, A69/4)
	Attaching
12	Position valve (1) on wheel sensor (A69/1, A69/2, A69/3, A69/4) and slide sleeve (5) as well as seal ring (4) onto the valve (1)	: The marking (arrow A) on the sleeve (5) must be opposite the marking (arrow B) on the wheel sensor (A69/1, A69/2, A69/3, A69/4). The valve (1), sleeve (5), seal ring (4) and nut (2) are available in a repair kit and should always be replaced.
13	Position wheel sensor (A69/1, A69/2, A69/3, A69/4) with valve (1) on the disk wheel and tighten nut (2)		*BA40.10-P-1002-01E
14	Coat inner and outer rim flange as well as both tire beads using tire assembly paste. Align mounting head of the tire mounting device at a small distance (X, Y) to the disk wheel	Only use tire mounting paste for mounting tires.
15	Position the disk wheel so that the valve (1), viewed in the direction of rotation, is located approx. 180° degrees in front of the mounting head
16	Put the tire on the disk wheel at an angle and pull on over the rim flange	Ensure that the tire does not exert any pressure on the wheel sensor (A69/1, A69/2, A69/3, A69/4) during pulling on as the latter can be damaged as a result. Observe the running direction on tires with specified running direction. Put as little stress as possible on bead area.
17	Align match points of the tire and disk wheel with each other, remove disk wheel with tire from tire mounting device
18	Pump up tire without valve element to a maximum of 3 bar	The tire must slide evenly over the safety hump of the disk wheel, if necessary coat the tire bead with tire assembly paste again.
19	Screw the valve element into the valve (1) and correct tire inflation pressure to the specified value	In order to prevent electrochemical corrosion, only special nickel-plated valve elements may be used may be used in the aluminum valves of wheel sensors (A69/1, A69/2, A69/3, A69/4). Uncoated brass inserts (standard valve elements) lead to severe corrosion damage and can destroy the valve. See tire pressure information on the B-pillar of the driver door.
20	Balance wheel		AR40.10-P-1040MCC

WHEELS

Number	Designation		Model 451.3/4
BA40.10-P-1002-01E	Nut to valve	Nm	6