Miller Electric 251 NT Welding System User Manual


 
OM-486 Page 22
SECTION 7 MAINTENANCE AND TROUBLESHOOTING
7-1. Routine Maintenance
Recycle
engine
fluids.
Y Stop engine before maintaining.
. See Engine Manual and Maintenance Label. Ser-
vice more often if used in severe conditions.
* To be done by Factory Authorized Service Agent.
8 h
Wipe up spills.
Check fluid levels.
See Section 4-2.
OIL
Full
20 h 25 h
Check and clean
spark arrestor screen.
See Section 7-4.
Service air filter wrapper
(foam element). See
Section 7-3.
50 h
Clean and
tighten weld
terminals.
Clean cooling system. See
engine manual.
100 h
Change oil. See
Section 7-5 and
maintenance
label.
Change oil filter.
See Section 7-5
and maintenance
label.
Clean and
tighten battery
connections.
Service air filter element.
See Section 7-3.
200 h
Check valve
clearance.*
Replace fuel
filter. See
Section 7-5.
Replace
unreadable
labels.
Check spark plugs.
500 h
Repair or
replace cracked
cables.
Service welding generator
brushes and slip rings.
Service more often in dirty
conditions.*
1000 h
Blow out or
vacuum inside.
During heavy
service, clean
monthly.
OR
Clean crankcase
breather valve.
Remove cylinder
head deposits.*