MAINTENANCE
226
CHASSIS TROUBLESHOOTING
Table 2 Coupling Heads
Fault Cause Remedy
Coupling does
not engage onto
ball
Ball diameter too large.
Ball could be damaged or
deformed.
Coupling head dirty or
defective.
Change ball to correct size.
Fit new ball.
Clean & Lubricate coupling and replace if
necessary.
Difficulty in
Uncoupling
Ball damaged or deformed.
Coupling damaged or
deformed.
Coupling head under pressure
from damper.
Fit new ball.
Replace if necessary.
Pull forward a few inches to relieve
pressure
Too much play in
the coupling
Coupling damaged or
deformed
Ball too small
Replace if necessary.
Fit new ball.
Table 3 Overrun Devices
Fault Cause Remedy
Poor Braking Overrun shaft tight.
Overrun shaft corroded.
Body housing damaged.
Lubricate overrun shaft and replace any
damaged parts.
Brakes
Overheating
During Towing
Handbrake not fully released.
Braking system incorrectly set.
Incorrect attachment of
breakaway cable.
Release handbrake.
Reset brakes as page 212-213.
Ensure correct attachment as listed on page
29 or refer to Braked Trailers
Use of Breakaway Cables sheet.
Handbrake
Force Low
Defective gas strut.
Incorrect setting of spring
cylinder.
Replace gas strut.
Reset spring cylinder as page 212-213.
Brakes
Apply During
Deceleration or
Downhill Travel.
Overrun damper is defective. Replace the overrun damper.
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