Owner manual

ADJUSTMENTS
25
4111-0013 — Aug. 2007
Dec.2008
NOTE: Adjusting the tension of lift springs (D) usually
requires that the lip assist spring (C) also be
adjusted.
If the platform does not rise fully and/or lip does not
extend fully, the lift spring tension may be set too low.
If the platform cannot be walked down or is difficult to
walk down, the lift spring tension may be set too high.
3. After lift spring adjustment is completed, check
operation of the lip.
• If the lip folds before the platform can be
walked down, tension of lip assist spring (C)
may be set too low.
• If the lip does not fold fully or takes too long to
fold, tension of lip assist spring (C) may be set
too high.
4. Adjust lip assist spring tension as follows:
NOTE: Use two-turn increments when adjusting lip
assist spring (C). Check lip operation after
each adjustment. Repeat until proper
operation is obtained.
a. Loosen jam nut (A).
b. To increase spring tension, turn nut (B)
clockwise.
c. To decrease spring tension, turn nut (B)
counterclockwise.
d. Tighten jam nut.
5. Recheck operation of platform and lip. Readjust lift
spring tension and lip assist spring tension until
proper operation is obtained.
1. Raise the platform and engage the platform
maintenance prop. Lock the maintenance prop in
the service position using an appropriate locking
device.
2. Adjust tension of lift springs (D) as follows:
NOTE: Use 1/2 turn increments when adjusting lift
spring bolt (E). Check platform operation
after each adjustment. Repeat until proper
operation is obtained.
• To increase lift spring tension, turn lift spring
bolt (E) clockwise.
• To decrease lift spring tension, turn lift spring
bolt (E) counterclockwise.
If the platform does not rise fully on its own, it may
be necessary to use an external lifting device. Use
a lifting device with the appropriate lifting capacity
to safely raise the platform. Make sure to engage
and lock the platform maintenance prop after
raising the platform. Failure to do this may result in
serious personal injury or death.
IMPORTANT
IMPORTANT
When using an external lifting device to raise the
platform, make sure hold-down mechanism (F) is
disengaged. Pull and hold platform release ring
during the lifting process to avoid shearing the
ratchet pawl and ratchet bar teeth.