116
Malfunction
Coupling dirty on the inside
Ball of towing vehicle too big
Clean and grease thoroughly
Check ball diameter:
According to DIN 74058, the ball on the car
must not exceed 50 mm in diameter when
new, and it must be 49.5 mm in diameter.
If the ball diameter decreases to less than
49.0 mm, the ball has to be replaced.
The ball must be perfectly spherical
Cause
Remedy
16. Undercarriage
Ball coupling does not rest on ball
Danger
Works on the brake system may only be
carried out in specialized workshops.
When replacing braking shoes, make
sure that all brake shoes of the axle are
replaced.
When working at the wheel brakes,
make sure that the springs, the brake
shoes and the spreading lever are
correctly installed; observe the correct
sense of rotation.
When adjusting the wheel brakes, turn
wheels in forward direction!
Basically, a readjustment according to
chapter 17.5 "Fitting of the braking
system" must be effected whenever
works are carried out at the brake
system.
If the wheel brakes or the brake drum
have got very hot, continue to drive
carefully on, if possible, until they have
somewhat cooled down.
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