First Products UA60T, Руководство оператора и список запчастей

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First Products UA-60T Operator’s Manual
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21
Rotor Shaft Service
When rotor replacement is needed or repaired on an
Aera-vator shaft, the following steps must be taken
in order to properly maintenance these items.
Rotor Shaft Disassembly
1. With the rotor shaft removed from the frame and
secured on the floor, remove the 1-1/8" hex jam
nut from the shaft end nearest to the damaged
component (use Figure 16 for visual reference).
2. Only remove the rotors and spacers required to
reach the damaged component. Wipe the shaft
clean before each rotor is removed. Each rotor
bearing has two separate cones with a hex bore
adapter pressed in each. Each cone is held in
position by an internal grease seal, which allows
the cones to be moved apart slightly. When they
are moved apart any dirt allowed inside the hex
adapters can fall between the cones and
contaminate the bearing. If the cones are forced
apart the internal seals become ruined and
irreplaceable.
3. Clean and inspect parts as they are removed and
set aside in their order of removal to simplify re-
assembly.
Figure 17 Rotor Shaft Disassembly
Rotor Hub Disassembly
1. With a pry bar remove the external seals Figure
18) on both sides. Generally, seals are damaged
and are not reused.
2. Remove the snap rings on both sides.
3. Press used bearing and adapter assembly out .
Figure 18. Rotor Assembly
Rotor Hub Re-Assembly
(Keep all components clean to prevent bearing
contamination.)
1. Install internal snap ring in one side of rotor
hub. Be sure snap rings expand full depth
into grooves.
2. Press new bearing and adapter assembly down
tight against snap ring. If bearing is loose in
hub the rotor should be replaced.
3. Install snap ring in the other side.
4. Apply a ribbon of general-purpose grease
between the snap ring ID and bearing adapter OD
on both ends of the rotor hub.
5. With the press tool inverted to fit the external
seals, press the seals in both ends of the rotor
with the lips out. Wipe off excess grease. Be
sure seals are not bent or cut and are seated
firmly.
If the seals are not tight, use a hammer
and punch to stake the hub faces at about 90

intervals .
Rotor Shaft Re-Assembly
(Read this section thoroughly before beginning.)
To apply force against the rotors or tines while
removing rotor assemblies will ruin the
irreplaceable internal rotor bearing seals. Use a
blunt bar against the thick face of the bearing
adapter to drive the rotors off the shaft.