Maxxair MAXXFAN Guide

Page 1 of 3

MAXXFAN

FAN BLADE REPLACEMENT INSTRUCTIONS

Parts Provided:

Fan Blade Washer, Motor Shaft

1. CAUTION: Turn off 12volt power to MaxxFan.

2. Remove insect screen by turning

(4) locking tabs to release, See photo A.

photo A photo B

3. CAUTION:The fan blade may have sharp edges!

Using a ½” wrench or an adjustable

wrench, remove locknut that holds the fan

blade to the motor shaft. Using a cloth or

paper towel to avoid sharp edges, hold the

fan blade with one hand to prevent the

motor from rotating while loosening the

nut. Turn the nut counter-clockwise to

loosen, See photo C.

photo C

4. Locate the small flat on the motor shaft, See photo D. Using an adjustable

wrench or a 9/32” open end wrench, hold the motor shaft. Tighten the adjustable

wrench on the small flat as needed. With your other hand, protected by a cloth or

paper towel, turn the fan counter-clockwise slightly to align the flat on the fan

blade hub with the flat on the motor shaft. You will feel a slight amount of play

between the fan blade and the motor shaft when the flats are properly aligned, See

photo E.

Locking

Tab

Locknut

Hold fan

lade Loosen

Page 2 of 3

Photo D photo E

5. Grasp the fan blade at the center hub and gently pull it straight off of the motor

shaft, See photo F. The fan blade will be tight and there will be some resistance.

You may find it helpful to wrap your fingers around the fan blade hub, pulling,

while pressing on the end of the motor shaft with your thumbs, See photo G. Do

not apply excessive downward force on the motor mounts, See photo F.

photo F photo G

When the fan blade is removed, make sure

the small washer on the motor shaft

underneath the fan does not come off. If it

does, slide it back onto the motor shaft

before installing the new fan blade, See

photo H.

photo H

6. Locate the small metal ring on the boss of the new fan blade, See photo I. The

fan blade must be placed onto the motor shaft with the metal ring towards the

motor. Locate the small flat on the inside of the hole in the fan blade boss. This

flat must be aligned with the flat on the motor shaft to properly install the fan

blade, See photo I. Align the two flats and press the fan blade straight onto the

motor shaft until it bottoms out on the shaft washer. The fan blade will be tight

going on, make sure the flats are properly aligned before pressing the fan blade

onto the motor shaft, See photo J.

Flat on motor shaf

Washer must

stay on shaft

Hold

wrench

Turn fan

blade

Fan blade

hub

Motor mounts

Page 3 of 3

photo I photo J

7. Place the provided washer onto the shaft, and replace the nut onto the end of the

motor shaft, See photo K. Using a cloth or paper towel, hold the fan from turning

while tightening the nut with the ½” wrench or an adjustable wrench. Tighten the

nut fully, the end of the motor shaft should just stick through the plastic on the

end of the nut, See photo L.

photo K photo L

8. Replace the insect screen and secure with

the (4) locking tabs, See photo M.

photo M

9. Reapply the 12volt power to the MaxxFan. Turn the MaxxFan on and verify that

the fan does not wobble excessively. If the fan wobbles, the flats on the fan hub

and the motor shaft may not be properly aligned.

Metal ring, place this end

of fan on motor shaft first.

Flat in fan hole

End of shaft

just sticks

through nut

Align flats & press

fan blade straight

onto motor shaft

Place washer &

nut onto shaft.

Locking

Tab

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