20-02245 REV E
12
8.
Remove the three flat head screws, which attach the motor plate to the
motor assembly.
9.
Replace the motor assembly.
10.
Mount the new motor using a removable thread retainer and re-attach the
wave generator to the motor shaft.
11.
Clean exposed drive surfaces of the harmonic drive components and
apply a liberal coating of high pressure, lithium-bearing grease to all
components.
12.
Make sure the keyway pin is in place and slide the motor assembly into
position so that the key fits properly into the slot in the motor plate.
13.
Replace internal retaining rings.
Replace the end cap as described in the
END CAP REPLACEMENT
section of this
manual.
END CAP REPLACEMENT
IMPORTANT:
Using silicone grease or O-ring lubricant, completely fill the top retaining
ring groove with grease. If this is not done, the sealing O-ring will be damaged when
the end cap is installed.
IF AIR-FILLED:
With the end cap seal screws removed, replace the end cap and slowly push it into the
housing. It may be necessary to rotate the output shaft slightly for proper gear
engagement. Install the retaining ring and replace the seal screws.
IF OIL-FILLED:
STANDARD BELLOFRAM:
With the shaft end up, fill the unit with compensating fluid to approximately one half inch
from the top. Position the end cap assembly into the housing without pressing it in.
Since fluid may be ejected through the seal screw holes, place a towel over the end cap
to reduce the losses. Push the end cap down until the O-ring is at the snap ring grove.
Replace the seal screws. Continue to press the end cap/shaft assembly in the housing
bore and slowly push it into the housing.
DO NOT
apply large forces to the end of the
shaft. If the harmonic drive does not want to mesh easily, it is helpful to slightly rotate
the output shaft allowing the gear teeth to engage while applying moderate pressure to
the end cap. Install the snap ring, which retains the end cap, and replace the seal
screws located in the end plate.
