Magnum Industrial MI-31550, Operating Manual

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MAINTENANCE 

MAGNUM INDUSTRIAL 20" HEAVY-DUTY PLANER 

MI-31550 / MI-31552 / MI-31553

WARNING!

Before performing any maintenance, ensure the power switch is OFF and the power cord is unplugged

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CLEANING ANTI-KICKBACK FINGERS

This planer is equipped with 

ANTI-KICKBACK FINGERS (A)

that help prevent the workpiece from being violently ejected 
from the machine. Check them periodically and ensure they 
are clean and clear so they can move freely and operate 
correctly. See Figure 26.

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FIGURE 26: ANTI-KICKBACK FINGERS

ALIGNING PULLEYS

The drive belts and pulleys are located on the left side of the planer. To access them, 
remove the upper and lower panels on the left side of the planer using a 4 mm Allen key.

Using a straight edge, check that the pulleys are properly aligned. See Figure 27. If 
needed, align the pulleys by following these steps:

1.  Open the motor access door.

2.  Loosen the two 

NUTS (B)

 and the four 

NUTS (C)

 using 24 mm and 14 mm wrenches. 

See Figures 28 and 29.

3.  Reposition the motor on its mounting plate to align the pulleys.

4.  Retighten the four 

NUTS (C)

 and the belt tension 

NUTS (B)

. Check tension by 

pushing the belt with your finger. The belt should not move more than 1/2".

5.  Close the motor access door

FIGURE 27: CHECKING BELT ALIGNMENT

FIGURE 28: ALIGNING DRIVE PULLEYS

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FIGURE 28: ALIGNING DRIVE PULLEYS

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