16
Model 428Operating Procedures
Step 3
Insert the drive shaft into the rear shell bearing and
engage the square end firmly into the female socket of
the drive unit. Be certain that the drive shaft fits into the
drive coupling without binding.
Figure 10
Step 4
Check scraper blades for any nicks or signs of wear.
If any nicks are present or if the blade is worn, replace
both b lades.
Figure 11
If blades are in good condition, install the scraper blade
clip over the scraper blade. Place the rear scraper
blade over the rear holding pin (knife edge to the
outside). Holding the blade on the beater, turn i t over
and install the front blade the same way.
Step 5
Holding the blades in position, insert the beater
assembly into the freezing cylinder, and slide the
assembly into position over the drive shaft. Turn the
beater s lightly to be certain that the beater is properly
seated.
When in position, the beater will not protrude beyond
the front of the freezing cylinder .
Figure 12
Step 6
Install the white plastic guide bearing on the short end
of the torque r otor. Slide the o-ring into the groove on
the long end of the torque rotor and lubricate the o-ring.
Do not lubricate the guide bear ing.
Figure 13
