Ametek 930

5-34 | Model 900 ADA / Model 930 Sulfur Pit Analyzers
8. Replace the Drive Belt (o-ring) and Bearings (Figure 5-5):
a. Remove the (4) M3 x 8 screws that secure the Chopper Housing
to the Chopper Cover. Separate the two halves of the Chopper
Assembly.
b. Remove the Drive Belt by rolling it outward and away from the
groove of the Pulley.
c. Remove the Snap Ring and Spring Washer from the Chopper
Shaft.
Remove the Bushings (2), Bearings (2), and Chopper Wheel from
the Chopper Shaft.
d. Replace one Bushing on the Chopper Shaft, followed by a new
Bearing (P/N 300-9437), the Chopper Wheel, another new Bearing
and the other Bushing.
Replace the Spring Washer and the Snap Ring on the Chopper
Shaft.
e. Replace the new Drive Belt (o-ring, P/N 300-1528) by first placing
it in the Chopper Wheel groove and then rolling it over the Pulley
and into the groove. Use care to avoid stretching the Drive Belt.
Rotate the Chopper Wheel to ensure the Belt is properly seated
in the Chopper Wheel and Pulley grooves, and to make sure the
Bearings and other parts are properly aligned.
f. Align the two halves of the Chopper Assembly and secure them
using (4) M3 x 8 screws.