4.7. Faults and repairs
Fault observed Origin Solutions
Erratic braking of trailer - Faulty shock absorber Replace the shock absorber
Braking too weak
- Jaws worn Replace the jaws
- Jaws not run in Fault will disappear only after running in
- Incorrect linkage setting Adjust the setting
- Significant friction on the slide Grease the sliding parts
- Slide corrosion Remove the corrosion and grease
- Coupling height does not match that of
the towing vehicle
Adjust the height so that the two parts
are in the same horizontal plane
Drum temperature abnormally high
- Incorrect linkage setting Adjust the settings
- Incorrect brake setting Adjust the settings
- High levels of dust in the drums Remove the dust
- Jaws, springs, drums damaged Replace the damaged parts
- Brake cables or link rod damaged Replace the damaged parts
Jerky braking
- Incorrect linkage setting Adjust the settings
- Interfering parts on the slide Remove, clean and grease
- Corroded slide Remove the corrosion and grease
- Damage to slide guide rings
Replace the rings (and possibly the
slide) and grease
- Faulty shock absorber Replace the shock absorber
Trailer tending to swerve upon braking
- Cross-bar(s) not balanced Adjust the cross-bar(s)
- Different brake setting on the two sides Adjust the brake settings
- Cables damaged or incorrectly fitted
Replace the damaged parts
Refit the cables
- Poor load distribution Check the load distribution
When starting the trailer holds back the
towing vehicle
- Damage to slide or to guide rings Replace the faulty parts and grease
- Slide corrosion Remove the corrosion and grease
- Tie rod damaged
Replace the tie rod and adjust the
settings
- Linkage damaged or incorrectly set
Replace the damaged parts and adjust
the settings
- Brake on Loosen the brake
Play in the coupling head
- Head worn (see wear indicator) Replace the head
- Ball joint worn Replace the ball joint
Parking braking too weak
- Compensating spring incorrectly set Adjust the setting
- Braking system incorrectly set Adjust the setting
- Notched sector damaged
Replace the sector and adjust the
setting
- Lever ratchet worn Replace the lever and adjust the setting
- Cable ruptured Replace the cable and adjust the setting
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