Arc Trainer
®
Elevation Motor Tube Replacement
Kit No. 600AK004
Installation Instructions
TOOLS REQUIRED
• Phillips head screwdriver
• 9/16” Open end wrench
• Tape measure
NOTE: This instruction sheet was written to replace
the acme tube on the elevation motor without remov-
ing all of the shrouds. Only the elevation motor cover
needs to be removed.
1. Read and understand all instructions thoroughly
before installing this kit.
NOTE: Be sure to read step 5B. Do not remove the
tube without counting the number of turns
required to install the new tube properly.
2. Verify that you received the acme tube for the
elevation motor.
! WARNING: Disconnect the power cord before
beginning this procedure. Keep wet
items away from inside parts of the unit.
Electrical shock could occur even if the
unit is unplugged.
3. Elevate the unit and disconnect the power
source.
A. Turn the main power switch above the power
inlet to the on (1) position.
B. Press Quick Start.
C. Elevate the unit to level 3.
D. Turn the main power switch to the off (0)
position and unplug the power cord from the
power outlet. NOTE: Do not press stop.
4. Remove the center (elevation motor) cover.
A. Using a Phillips head screwdriver, remove the
two screws securing the center cover in place.
B. Remove the center cover
! WARNING: Do not touch components on the
lower board. A charge can remain
after unplugging the power cord
and turning off the unit.
5. Replace the acme tube
A. Using two 9/16” open end wrenches, remove
the bottom bolt and nut securing the actuator.
See Figure 2. NOTE: Do not lose the spacer
between the bolt and the nut.
Figure 1
Nut
Tube
Bottom Bolt
Spacer
B. Counting the number of turns, turn the tube
counter clockwise until the acme nut disen-
gages from the acme shaft. NOTE: You will
need to know the exact number of turns when
installing the new tube in the next step.
C. Install the new acme tube by turning the tube
clockwise the same number of turns that it took
to remove the old tube in step 5B.
D. Reconnect the actuator with the bolt, spacer
and nut removed from step 6A. Tighten
securely.
E. Locate the crosstube just below the shrouds
(shrouds with the yellow caution decal).
F. Measure from the top of the crosstube straight
up to the bottom of the shroud. On level 3, this
measurement should be approximately 2”.
NOTE: This step verifies that the elevation
motor is calibrated correctly.
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