28
Manual No. 4111-0019
May 2015
July 2016
TROUBLESHOOTING
Symptom Possible Cause Solution
Platform rises to full
height, but lip does not
fully extend.
Lip assist chain
disconnected or broken.
Connect or replace chain.
Insufficient main spring
tension.
Increase tension on main lift springs. (See Adjust
Lift Arm Spring and Lip Assist Spring Tension in the
Adjustments section.)
Insufficient lip assist force. Increase lip assist spring compression. (See Adjust
Lift Arm Spring and Lip Assist Spring Compression
in the Adjustments section.)
Platform does not lower
when operator walks out
onto the platform.
Excessive main spring
tension.
Reduce main spring tension. (See Adjust Lift
Arm Spring and Lip Assist Spring Tension in the
Adjustments section.)
Damaged or worn hold-
down mechanism.
Clean and inspect hold-down mechanism.
Lip folds too fast during
normal walk-down.
Insufficient lip assist force. Increase lip assist spring compression. (See Adjust
Lift Arm Spring and Lip Assist Spring compression in
the Adjustments section.)
Disconnected, worn, or
broken gas strut.
Inspect shock absorber. Connect or replace gas
strut.
Platform does not stay
down.
Entangled release chain. Remove cause of entanglement.
Dirt impacted in ratchet bar
teeth.
Clean and inspect ratchet bar and ratchet pawl
teeth. DO NOT lubricate the ratchet assembly.
Broken or damaged ratchet
assembly teeth.
Replace ratchet assembly. DO NOT lubricate the
ratchet assembly.
Disconnected or broken
hold-down pivot pins.
Replace hold-down pivot pins.
Damaged or worn hold-
down mechanism.
Clean and inspect hold-down mechanism.
Lip does not fold after
truck departs.
Lip hinge binding because
of lack of lubrication
Inject grease into all of the lip hinge grease fittings.
(See Periodic Maintenance in the Maintenance
section.)
Excessive lip assist force. Decrease lip assist spring compression. (See Adjust
Lift Arm Spring and Lip Assist Spring Compression
in the Adjustments section.)
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