Maintenance
133
Table 2 Coupling Heads
Coupling does not engage
onto ball
Difficulty in Uncoupling
Too much play in the
coupling
Fault
Ball diameter too large.
Ball could be damaged or deformed.
Coupling head dirty or defective.
Ball damaged or deformed.
Coupling damaged or deformed.
Coupling head under pressure from damper.
Coupling damaged or deformed
Ball too small
Change ball to correct size.
Fit new ball.
Clean & Lubricate coupling and replace if necessary.
Fit new ball.
Replace if necessary.
Pull forward a few inches to to relieve pressure
Replace if necessary.
Fit new ball.
Cause Remedy
Table 3 Overrun Devices
Poor Braking
Brakes Overheating During
Towing
Handbrake Force Low
Brakes Apply During
Deceleration or Downhill Travel.
Fault
Overrun shaft tight.
Overrun shaft corroded.
Body housing damaged.
Handbrake not fully released.
Braking system incorrectly set.
Incorrect attachment of breakaway cable.
Defective gas strut.
Incorrect setting of spring cylinder.
Overrun damper is defective.
Lubricate overrun shaft and replace any damaged parts.
Release handbrake.
Reset brakes as page 117.
Ensure correct attachment as listed on page ? or refer to Braked Trailers
Use of Breakaway Cables sheet.
Replace gas strut.
Reset spring cylinder as page 117.
Replace the overrun damper.
Cause Remedy
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