Loosen rear wheel nuts. Chock the front wheels and jack up the rear axle. Release the parking brake and place the shift lever in neutral.
Remove wheels and brake drums. Screwing tool 02.7834.9504 to the axle shaft (pic. 3-64), pass the indicator leg extension 1 through one hole of the axle shaft until it stops against the brake shield or oil deflector and fix the indicator.
Measure with an indicator, applying a force of about 49 N to the axle shaft flange (5 kgf) in both directions along the axis of the rear axle. The free play must not exceed 0.7 mm.