MSTEM Guide – Module 2: Installing Motor Mount & Motor To Chassis

Step 10 – Installing Motor onto Upper Motor Mount

10.1 – Lay motor onto a table or bench. When looking straight down, You should have 1 Terminal located at 12 O’clock and the other at 3 O’clock. 

10.2 – Bring the edge of motor to end of the table or bench you are working on. This will allow you to better and more easily place the Upper Motor mount onto the motor for securing.

10.2.1 – As you have placed the upper motor mount onto the face of the motor, you will align the holes with the motor mounting holes and prepare to install the mounting bolts to secure.

10.2.2 – Take the (4) 3/8″-16 x L.3/4″ bolts and the 3/8″ Washers to use for securing the plate to the motor. Initially screw each bolt with washer in to each of the 4 mounting points by hand to insure there is no cross threading. Go at least several turns by hand to make sure that everything is turning in smoothly to start. 

10.2.3 – Use your adjustable wrench to then finish tightening each of the 4 bolts. It is recommended to tighten the bolts in a cross pattern. For example start at the top bolt, then move to bottom bolt, then left or right, and then the opposite. After they have all been tightened, go around once more to make sure. 

10.3 – Flip the motor so that you can more easily mount the lower mount to the upper mount plate. The lower motor mount has an angle to it, so you can have the smaller thickness side facing forward of the motor. There should also be a motor terminal facing forward as well as an indication. 

10.5 – The Motor is now ready to place onto the chassis. Have the lower mount butterfly clamps along with the M10 bolts for each clamp ready to attached once you place the motor onto the frame. Loosely install the clamps just so that the motor may not be able to fall off of the kart if it gets bumped. Leave them loose enough so the motor can be slid back or forward in the upcoming steps in the process. 

10.6 – Harness B.2 Connect Red 2G Wire from Controller (B+ Terminal) to motor front side terminal. Please reference number 12 (Updated from Video Reference) in the wiring diagram to confirm wire placement. 

NOTE: When tightening the nuts of the Motor Terminals, DO NOT CRANK DOWN ON THEM WITH TOO MUCH FORCE THEY MAY DAMAGE OR BREAK THE BRUSH HOLDER TERMINALS. Tighten just until the nut stops moving and is secure without the terminal and wire being able to easily move. 

10.7 – Harness B.2 Connect Blue 2G Wire from Controller (J7 Terminal) to motor Top side terminal. Please reference number 18 (Updated from Video Reference) in the wiring diagram to confirm wire placement. 

10.8 – At this point in time, your system wiring should be completely connected. If the Anderson connectors are unplugged, you may connect them. Before continuing to the next step of motor drive sprocket install, you may power on your system to quickly test and make sure the motor turns over. Once you power the On/Off switch and E Stop switches on you should get a green light on the Alltrax indicator. If you move the accelerator pedal, the motor should start to turn over. 

PRO TIP – By default setting of the Alltrax controller, you may need to increase the battery power “Over Voltage” setting to max so that you don’t from the get-go receive an over voltage current fault code not allowing your system to work. Your Alltrax will blink 1 Green + 3 Red flashes continuously if this is the case. You’ll connect to the alltrax and increase the setting and set to controller and this fault code will be resolved. You can find further explanation of the Alltrax toolkit here on page 18 Section 9.4 for SR Model Controller Settings.