Miller Electric CBI 801D - Manual (Page 33)

OM-166 941 Page 28
5. When the weld/power speed reaches 1860 rpm,
prevent the adjustment screw from turning, and
tighten the securing nut.
6. Stop engine.
7. Close and secure side door.
8-9. BRUSHES AND SLIP RINGS (Figure 8-3)
WARNING: ELECTRIC SHOCK can kill
•
Do not touch live electrical parts.
•
Stop engine, and disconnect negative (−) bat-
tery cable from battery before inspecting,
maintaining, or servicing.
MOVING PARTS can cause serious injury.
•
Keep away from moving parts such as fans,
belts, and rotors.
HOT ENGINE PARTS can cause severe
burns.
•
Wear protective gloves and clothing when
working on a hot engine.
Brush life is very good under most operating conditions.
The brushes and slip rings should be inspected every
six months or whenever excitation voltage is lost. Be
sure that slip rings are clean and brushes are free to
move. If the welding generator has been operating un-
der extremely dusty or dirty conditions, increase the fre-
quency of inspection.
Under normal use, the slip rings will discolor to a dark
brown. If a buildup of brush material is noted, it may be
necessary to clean the slip rings. Clean rings with a
number 220 or finer sandpaper, and polish rings with
crocus cloth. Never use emery cloth because part of the
emery will embed itself into the rings and, in turn, de-
stroy the carbon brushes.
Replace the brushes if they become chipped or broken
or if less than 1/2 in. (12.7 mm) of brush material is left.
1/2 in. (12.7 mm)
Minimum
S-0234
Figure 8-3. Brush Replacement
8-10. ETHER STARTING AID (Optional)
CAUTION: ETHER INJECTION WHILE
ENGINE IS RUNNING can cause engine
damage.
•
Do not actuate ETHER STARTING AID while
engine is running.
The ether used in the cold weather starting aid system is
contained in a replaceable cylinder located behind the
right rear side door on the center portion of the frame.
No indicator is provided to show the amount of ether left
in the cylinder; therefore, it is recommended that a spare
cylinder be kept on hand. Generally, the ether cylinder is
empty if the engine fails to start in cold weather while uti-
lizing the cold weather starting system.
WARNING: IMPROPER HANDLING OR EX-
POSURE TO ETHER can seriously harm
your health.
•
Follow the manufacturer’s safety instructions
on the cylinder when handling ether compo-
nents.
The cylinder can be weighed to determine the amount
of ether inside. The cylinder weighs 33 ounces (936 gr)
when full, and it weighs 15 ounces (425 gr) when empty.
To replace the ether cylinder, see Section 4-10.
IMPORTANT: Before installing the ether cylinder, clean
nozzle on ether cylinder and fitting into which the ether
cylinder is inserted. If dirt is present in either of these ar-
eas, the system may not work.
IMPORTANT: After installing or replacing ether cylin-
der, do not use or test ether start system for at least 10 to
15 minutes to allow particles in fuel to settle to prevent
atomizer plugging.
8-11. SPARK ARRESTOR
WARNING: ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
•
Stop engine and disconnect negative (−)
battery cable from battery before beginning
this installation.
MOVING PARTS can cause severe injury.
•
Keep away from moving parts such as fans,
belts, and rotors.
ENGINE EXHAUST SPARKS can cause fire.
•
Exhaust spark arrestor must be installed in
accordance with local, state, and federal
regulations.
•
Stop engine before cleaning spark arrestor.
•
Clean spark arrestor in a noncombustible
environment.
HOT PARTS can cause severe burns.
•
The exhaust system must be cold when
servicing the spark arrestor.
Internal combustion engines operating in a highly com-
bustible environment are a common fire hazard. Glow-
ing carbon particles blown out with the exhaust can re-
tain sufficient heat to ignite materials. While no practical
spark arresting device will stop all sparks, this device will
minimize fire hazards by removing and trapping most
solid particles provided that is is properly maintained.
Inspect and service spark arrestor every 250 operation
hours.