Bottarini GDP21 - Page 59

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15. Undercarriage
Malfunction Cause Remedy
Insufficient braking effect Excessive backlash in brake system Re-adjust brake system
Brake linings not "run in"
Actuate hand-brake lever slightly; drive 2-3
kilometers
Brake linings glazed, oily or damaged
Replace brake shoes completely; clean braking
areas in the brake drums
Overrunning hitch hard to operate Grease overrunning hitch
Brake linkage is jammed or deformed Eliminate cause
Brake Bowden cables rusty or kinked Replace Bowden cables
Brake reacts by jerks Excessive backlash in brake system Re-adjust brake system
Shock absorber of overrunning hitch
defective
Replace shock absorber
Backmat brake shoe is jammed in the
brake shoe holder
Replace compl. brake shoes with brake shoe
holders
Trailer is braked unilaterally Wheel brakes are actuated unilaterally Re-adjust brake system
Causes: possibly specified under
"Insufficient braking effect"
see above
Trailer is already braked when the
accelerator pedal is released
Shock absorber of overrunning hitch
defective
Replace shock absorber
Reverse driving had to accomplish, or
Brake system adjusted too tightly Re-adjust brake system
even impossible
Bowden cables pre-loaded Re-adjust brake system
Backmat brake shoe is jammed in the
brake shoe holder
Replace compl. brake shoes with brake shoe
holders
Braking action of hand-brake
insufficient
Incorrect setting Re-adjust brake system
Actuate hand-brake lever as far as possible
Causes: possibly specified under
"Insufficient braking effect"
Backmat brake shoe is jammed in the
brake shoe holder
idem
Replace compl. brake shoes with brake shoe
holders
Wheel brakes get hot Brake system incorrectly set Re-adjust brake system
Causes: possibly specified under
"Insufficient braking effect"
Backmat brake shoe is jammed in the
brake shoe holder
idem
Replace compl. brake shoes with brake shoe
holders
Wheel brakes dirty Clean
Reversing lever of overrunning hitch is
jammed
Handbrake lever not or only partially
released
Remove reversing lever, clean it and grease it
with Molykote
Set handbrake lever into zero- position
Ball coupling does not rest on ball Coupling dirty on the inside Clean and grease thoroughly
Ball of towing vehicle too big Check ball diameter: According to DIN 74058,
the ball on the car must not exceed 50 mm in
diameter when new. If the ball diameter
decreases to less than 49.5 mm, the ball has to
be replaced.
The ball must be perfectly spherical