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MANUAL OPERATION
Your Thunder Electric Tarp System should
operate smoothly and provide years of
service. In the unlikely event that an issue
arises with the electric drive motor for the
system, please follow these instructions to
manually open and close the tarp system.
1. Remove the motor shaft drive nut and
bolt assembly from the roll tube axle.
See figure 4.1.
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 figure 4.2.
3. Locate the spline on the tarp roll rube,
rear of the trailer seen in figure 4.3.
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 figure 4.4.
5. Roll the tarp open and closed with the
crank handle.
6. When finished, 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.
Do not travel with the motor disengaged
from the roll-tube as the motor may slide
off and cause the arm to fall, causing trailer
or tarp system 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.
Fig. 4.3
Fig. 4.1
Drive bolt
and nut
Fig. 4.2
Fig. 4.4
