Heli-Max HMXE0835 Maintenance Guide

Heli-Max™ 1SQ Trouble Shooting
and Repair Tech Sheet:

The Heli Max™ 1SQ is very strong for its
weight. It takes quite a bit of abuse but
can from time to time get “tweaked” and
will need to be checked over to keep it in
top flying condition.

The Heli-Max™ 1SQ is very easy to work
on and repair. Only simple tools like the
included Phillips screwdriver (or any
Number 1 Phillips screwdriver) and an
additional hobby knife are needed to
keep it in top flying shape.

The most common questions are:
My 1SQ pulls in one direction, why does it do that?
One of my motors does not spin free like the others, why is this?

Both of these conditions are typically the result of an impact to a hard surface. What can happen is, one
or more of the propellers or motors can “jam” as a result of the impact. Below we list the way to check
and adjust for this as well as how to replace the motor arm if needed.

Let’s start by checking each of the
propellers.

1: With the 1SQ on your work bench give
each of the propellers a spin. They should
all spin freely and rotate 3 to 4

revolutions. NOTE: It’s a good idea to

check this after each hard crash! If you
find one (or more) propellers that do not
spin freely, here are the steps to help
determine what might be causing this.

2: Push up on the bottom of the motor to
make sure the motor is fully seated upward
in the mount. In the event of a crash the
motor can shift downward in the mount,
pinching the propeller against the motor
mount.

3: The propeller can slide down the shaft
pinching the propeller against the motor can.
After following step two it’s best to check the
clearance of the parts. We have found that
the best distance between the prop and the
motor mount is about 1mm, or the width of a
hobby blade. You can use your hobby knife to
pry the blade away from the motor mount if
needed.