The AirMax™ Mach 3 motor delivers
high levels of torque over a wide range
of speeds. To keep the motor operating at peak
efficiency, it should be cleaned and inspected after every
80 hours of usage.
As long as there is no performance loss, most of the
inspection of the air motor can be done without disas-
sembly. However, if the operator mentions a loss in
power, use the following procedure.
For complete instruc-
tions refer to the AirMax™ Mach 3 Operating Instructions.
Air Motor Disassembly
1. Tool and Maintenance Kit #185975 is required to
dissemble a Mach 3 trimmer.
2. Unscrew retainer using the spanner wrench. Note:
This is a left-hand thread and must be turned right
(clockwise) to unscrew. Slide components out of
handle. If parts don't slide out easily, tap the handle
lightly against a plastic block to dislodge.
3. Separate the motor from the gear head and adapter.
4. Place the upper bearing plate removal clamps around
the upper bearing as shown in
Figure 3
.
5. Using a hammer and plastic sleeve, tap the gear teeth
cap until the rotor is free from the upper bearing
plate.
Figure 4.
Remove the upper bearing and
cylinder.
6. Remove vanes from the rotor and inspect for
chipped or broken tips, grooves and vane height.
Replace vanes with grooves more that .010" (.25
mm) deep or with a height less than .195" (.5 mm).
Next, inspect the rotor for cracked, broken teeth, or
excessive wear.
Inspect
¨
Clean buildup out of inlet and exhaust ports
¨
Check gear teeth for cracks or damage. Worn teeth
are indicated by rounded or pointed tops
¨
Inspect guide pin to verify it is not bent
¨
Check the cylinder interior for grooves
¨
Replace any parts that are damaged or worn
¨
Check vanes as shown in
Figure 5
¨
Verify the O-Ring is inplace inside handle
Figure 6
Place air motor in bearing plate assembly tool and
tap to remove.
™
AirMax Mach 3 Power Unit Maintenance
Maintenance tips that improve both performance and tool life
Gear Head
Mach 3 Air Motor
Adapter, Muffler
Retainer
2
3
4
New Worn Broken
Make sure O-Ring
is seated.
5
6
Note
:
Left-hand thread
1
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