Troubleshooting - Kelley aFX User Manual

Before troubleshooting the dock leveler, read and follow
the Safety Practices on page 3 and the Operations
Instruction section on pages 16 through 18 of this User's
Manual.
Be certain, before climbing into the dock leveler pit or
doing any maintenance or repair under the dock leveler,
that: 1) THE MAINTENANCE STRUT AND LIP LOCK ARE
SECURELy PINNED IN PLACE [see page 22] and 2) The
power is disconnected and properly tagged or locked off.
Before doing any electrical work, make certain the power
is disconnected and properly tagged or locked off.
probLeM
1) Leveler does not raise. Motor fails to
run.
2) Leveler does not raise or does not raise
completely. Motor runs.
August 2012
poSSibLe caUSe
a) Fuse blown or breaker tripped.
b) No electrical power to push-button.
c) Push-button is broken.
d) Fan plug loose or unplugged in
receptacle.
e) Loose wires in control panel or junction
box.
f) Fan assembly damaged/broken.
a) Obstruction(s) preventing the leveler
from raising.
b) holes or leaks in the lifting bag.
c) Loose or misaligned bag fittings or loose
bag clamps.
d) Motor voltage too low.
6004751K — aFX and aFX-S Dock Leveler — Safe
®

TroUbLeSHooTing

noTe:
Follow Service Tools use instructions on pages 22 through
24.
Fig. 35
Hanger bracket
Swing link
Notch
Center bolt
Push Bar
a) Replace fuse or reset breaker.
b) Check all power supplies to control
panel and make sure connections are
tight.
c) Replace push-button.
d) Check and tighten connection to
receptacle.
e) Repair or replace wires.
f) Replace fan assembly.
a) If an obstruction is found, turn off
power before attempting to clear the
obstruction.
b) Order the patch kit from your dealer or
Kelley
large, replace bag assembly.
c) Repair or replace as required. See parts
list on page 38 and 39.
d) Verify motor voltage is between 110-129
volts AC while motor is running at full
load.
T
Frame
Dock leveler ramp
Roller
Connecting rod
Pit Floor
SoLUTion
to repair holes. If holes are too
®
®
©2012 4Front Engineered Solutions, Inc.
Lip
25