Faults And Repairs - SDMO R 340 U User And Maintenance Manual

4.7.

Faults and repairs

Fault observed
Erratic braking of trailer
Braking too weak
Drum temperature abnormally high
Jerky braking
Trailer tending to swerve upon braking
When starting the trailer holds back the
towing vehicle
Play in the coupling head
Parking braking too weak
Origin
- Faulty shock absorber
- Jaws worn
- Jaws not run in
- Incorrect linkage setting
- Significant friction on the slide
- Slide corrosion
- Coupling height does not match that of
the towing vehicle
- Incorrect linkage setting
- Incorrect brake setting
- High levels of dust in the drums
- Jaws, springs, drums damaged
- Brake cables or link rod damaged
- Incorrect linkage setting
- Interfering parts on the slide
- Corroded slide
- Damage to slide guide rings
- Faulty shock absorber
- Cross-bar(s) not balanced
- Different brake setting on the two sides
- Cables damaged or incorrectly fitted
- Poor load distribution
- Damage to slide or to guide rings
- Slide corrosion
- Tie rod damaged
- Linkage damaged or incorrectly set
- Brake on
- Head worn (see wear indicator)
- Ball joint worn
- Compensating spring incorrectly set
- Braking system incorrectly set
- Notched sector damaged
- Lever ratchet worn
- Cable ruptured
31/285
Solutions
Replace the shock absorber
Replace the jaws
Fault will disappear only after running in
Adjust the setting
Grease the sliding parts
Remove the corrosion and grease
Adjust the height so that the two parts
are in the same horizontal plane
Adjust the settings
Adjust the settings
Remove the dust
Replace the damaged parts
Replace the damaged parts
Adjust the settings
Remove, clean and grease
Remove the corrosion and grease
Replace the rings (and possibly the
slide) and grease
Replace the shock absorber
Adjust the cross-bar(s)
Adjust the brake settings
Replace the damaged parts
Refit the cables
Check the load distribution
Replace the faulty parts and grease
Remove the corrosion and grease
Replace the tie rod and adjust the
settings
Replace the damaged parts and adjust
the settings
Loosen the brake
Replace the head
Replace the ball joint
Adjust the setting
Adjust the setting
Replace the sector and adjust the setting
Replace the lever and adjust the setting
Replace the cable and adjust the setting