As-703 & As-705 Reassembly; As-704 & As-706 Disassembly; As-704 & As-706 Reassembly - DSI Dynamatic AS-703 Instruction Manual

AS-703 & AS-705 Reassembly
1. If fan (8) was removed, install key (9) into shaft;
heat hub of the fan and press it over the key
onto the shaft flush against shoulder of the
shaft. Install snap ring (7).
2. Align match marks and bolt coil and field
assembly (3) together with brake leads routed
into the junction box.
3. Press bearings (5) into each end of shaft with
an approved pusher device. Apply pressure
only to the inner race until bearings are flush
against shoulders of the shaft.
4. Pack bearing cavity in both ends with
recommended grease. Slide field assembly (6)
over bearing and slide entire shaft assembly
into housing to position bearing into the
thoroughly cleaned chamber of housing.
5. Align holes of field assembly (3) with holes in
housing (4) and secure with four cap screws
and lockwashers (2). Rotate shaft to ensure
that no binding exists.
6. Replace key(s) (1), connect brake leads in
junction box and replace cover. Brake is ready
for return to operation.
AS-704 & AS-706 Disassembly
1. Remove unit from operation and pull off shaft
coupling hubs, or sheaves, with approved
bearing puller and remove shaft key(s) (1).
2. Remove junction box cover at each end of
brake by removing two screws. Disconnect
brake leads inside of both junction boxes.
3. Remove cap screws and lockwashers (2) from
both field assemblies (3) and slide one field
assembly off of the shaft.
4. Slide the entire shaft assembly out of the other
end of housing (4). Slide second field assembly
off of bearing. field assembly off of bearing.
5. Using an approved bearing puller, remove
bearing (5) from each end of shaft (6). Force
should be applied only to the inner race when
removing bearing.
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6. Remove bolts holding the coil to the field
assembly at each end, after match marking,
being careful not to scrape insulation off of coil
Ieads.
7. If necessary, remove snap rings (7), rotors (8)
fans (9) and keys (10) from the shaft; heat hub
of fan if necessary.
8. Clean all pieces of grease and dirt before
reassembly.
AS-704 & AS-706 Reassembly
1. Slide the entire shaft assembly out of the other
end of housing (4). Slide second field assembly
off of bearing.
2. Using an approved bearing puller, remove
bearing (5) from each end of shaft (6). Force
should be applied only to the inner race when
removing bearings.
3. Remove bolts holding the coil to the field
assembly at each end, after match marking,
being careful not to scrape insulation off of coil
leads.
4. If necessary, remove snap rings (7), rotors (8),
fans (9) and keys (10) from the shaft; heat hub
of rotors if necessary.
5. Clean all pieces of grease and dirt before
reassembly.
Reassembly
1. If fans (9) and rotors (8) were removed, install
keys (10) into shaft; heat hub of fans if
necessary and press them over the key onto
the shaft flush against shoulders of shaft. Install
snap rings (7)
2. Align match marks and bolt both coil and field
assemblies (3) together with brake leads routed
into their respective junction box.