Lincoln Electric BULLDOG IM10074 - Manual (Page 35)

D-4 MAINTENANCE D-4
BULLDOG™ 5500
GENERATOR/WELDER MAINTENANCE
STORAGE: Store the BULLDOG™ 5500 in clean,
dry, protected areas.
CLEANING: Blow out the generator and controls
periodically with low pressure air. Do this at least
once a week in particularly dirty areas.
BRUSH REMOVAL AND REPLACEMENT: See
Figure D.6. Itʼs normal for the brushes and slip rings
to wear and darken slightly. Inspect the brushes
when a general overhaul is necessary. Remove the
brushes and clean the slip rings with fine grit emery
paper.
Do not attempt to polish slip rings while engine
is running.
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To reinstall the brushes (Item 5), press them upward
and slide a cable tie (Item 6) through the brush hold-
er tabs as shown in figure D.6. Install the brush
holder (Item 1) into the bearing end bracket (Item 3)
and secure with the screws (Item 4) previously
removed. Remove the cable tie and the brushes will
seat onto the slip rings and replace bearing bracket
end cover (Item 2).
RECEPTACLES: Keep the electrical receptacles in
good condition. Remove any dirt, oil, or other debris
from their surfaces and holes.
CABLE CONNECTIONS: Check the welding cable
connections at the weld output terminals often. Be
sure that the connections are always tight.
NOTE: Lincoln offers a rotor removal kit for any ser-
vice which requires removal of the rotor from the
engine. See the ACCESSORIES section for further
details.
Removal of engine/generator assembly from the
cradle can be achieved as follows:
• Remove the two 5/16-18 hex head cap screws
from the engine block via the access hole located
in the cradle cross support channel. Leave all other
engine mountings intact.
• Remove the two hex nuts from the isolator thread-
ed posts at the stator support bracket located
opposite the engine. Leave all other stator mount-
ings intact.
• With a jib hoist or crane, lift the unit upward and
remove loose cradle from engine/generator
assembly.
1. BRUSH, BRUSH HOLDER ASSEMBLY
2. BEARING BRACKET END COVER
3. STATOR END BRACKET
4. (2) SCREWS
5. (2) BRUSHES
6. CABLE TIE
1
2
3
4
6
5
FIGURE D.6. – BRUSH REMOVAL AND REPLACEMENT
CAUTION