Tractor - coupling system
Kingpin/Apron:
Make sure kingpin is not bent or worn. Also
make sure that the apron lies flat on the fifth
wheel skid plate and that the visible part of
the apron is not bent, worn, cracked or
broken.
Rear suspension
Springs:
Check for broken or shifted leaves or leaves
that are in contact, or nearly contacting a tire,
rim, brake drum, frame or body component.
Check for missing or broken leaves in the leaf
spring.
Spring mounts:
Check for cracked or broken spring hangers,
broken, missing or loose bolts, missing or
damaged bushings, broken, loose or missing
axle mounting parts.
Torsion, shocks:
Make sure torsion arm is not cracked, broken
or missing. Check the shock absorber for
cracks or leaks; there should be no missing or
broken mounting bolts or worn bushings.
Rear brakes
Hoses:
Checked for cracked, worn or frayed hoses.
Make sure all couplings are secured.
Chambers:
Make sure brake chambers are not cracked or
dented and that they are securely mounted.
Slack adjuster:
Check for broken, loose or missing parts. The
angle between the push rod and adjuster arm
should be approximately 90° when the brakes
are applied. When pulled by hand, the push
rod should not move more than approximately
one inch (2.5 cm).
2009 F-650/750
(f67)
Supplement
USA
(fus)
Vehicle Inspection Guide
20
