Brake testing on test stand - AP42.00-P-4290V

MODEL 171 

Fig 1: Identifying Brake Testing On Test Stand

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

19.1.04

Step "Check free travel of service brake pedal" removed.

	Checking
	Risk of death  caused by body parts being pulled in by rotating vehicle wheels and roller dynamometer rollers	Do not insert your hand into rotating parts. Wear closed and snug-fitting work clothes. Safeguard areas with rotating vehicle parts and dynamometer rollers against unauthorized access.
		Safeguard roller dynamometer from unauthorized access.
1	Drive the vehicle onto the brake test stand
2	Measure deceleration values of service brake	Permissible deviation from the higher value: maximum 25 %. If the braking effect is uneven or inadequate, establish the cause and eliminate against a separate order: ↓
		Checking brake lining thickness.
3	Operate parking brake handlever and measure deceleration values of parking brake	Permissible deviation from the higher value: maximum 50 %. If the braking effect is uneven or inadequate: ↓
		Run in parking brake as specified
		Adjusting parking brake. If the braking effect is uneven or inadequate, establish the cause and eliminate against a separate order: ↓ Check parking brake cables for ease of movement and damage, if necessary check the condition of the parking brake shoes, expansion locks and brake disks: ↓ Remove brake disks from rear axle and replace defective components:	AR42.20-P-0540V
		Model 171.442/454/456	AR42.10-P-0220V
4	Drive vehicle off the brake test stand