Midwest Shorty 2-Speed Motor
The Midwest Shorty 2-speed motor has been in existence for many years. It is a durable
handpiece and has a speed range of 0 – 30000 rpm. It has replaced the Midwest Tru-Torc
and you will come across them quite often in the field. Many aftermarket replacement
parts exist for this handpiece. As always, try to determine the problem before
disassembling the handpiece.
Some of the most common problems and solutions are addressed in the Midwest Tru-
Torc and Shorty troubleshooting guide immediately preceding this section.
Sub Assembly A & B Disassembly
STEP 1
Remove the front sheath housing. Do this by
placing it in a 3/4”collet just below the spindle
lock button as shown. Then wrap a strip of
rubber around the speed change collar and
motor housing and unscrew. All the threads on this handpiece are
regular thread, so turn counterclockwise to remove. Next, simply
unscrew the speed change collar screws and remove the collar.
STEP 2
Lock the clutch housing of the handpiece into a 49/64” collet. Loosen
the upper turbine housing by hand and remove. Remove any spacer
washer(s) and place them on your work surface.
Sub Assembly A Disassembly (Nose Section)
STEP 3
Line the wide drive rings up with the half moon grooves in the
clutch as shown at left. Reach under the drive plate with a flat thin
screwdriver. Pry the plate up. This will expose the three wide
drive rings. Place them along side the drive plate on your work
surface. You may need to work your way around slowly while
always prying UP on the drive plate.
