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Date of Origin – 02/24/11
Updated – 02/03/20
1. Remove the motor shaft drive nut and bolt
assembly from the roll tube axle. See gure 5.1.
Note: Save the nut and bolt. If drive bolt will
not come out due to excess tension from the
drive motor, disconnect the motor leads
and use jumper cables from a battery source
to drive the motor in a direction that removes
this tension.
2. Remove the manual tarp crank handle from the
crank handle retainer on the side of the trailer
as seen in gure 5.2.
3. Locate the spline on the tarp roll rube, rear of
the trailer seen in gure 5.3.
4. Slide the tarp crank handle universal joint and
roll tube drive spline together (rear of trailer) by
pushing the universal joint in-place until fully
engaged with the roll tube spline. See gure 5.4.
5. Roll the tarp open and closed with the crank
handle.
6. When nished, return the handle to the tarp
crank handle retainer on the side of the trailer
for storage and/or transport.
CAUTION! - The front and
rear arms are spring loaded
and can shift when the bolts
are removed. Use an OSHA
approved work platform when
performing any maintenance
on the motor or arms.
WARNING! - Do not travel
with the motor disengaged
from the roll-tube as the motor
may slide o and cause the
arm to fall, causing trailer or tarp sys-
tem damage. It is recommended that the
motor and arm assembly be secured to
the front ladder assembly with a bungee
cord if the trailer must travel while tarp
system is disengaged.
THUNDER ELECTRIC TARP SYSTEM,
MANUAL OPERATION