TM 9-4940-421-14
Table 3-2. Operator/Crew Preventive Maintenance Checks and Services (cont)
LOCATION
NOT FULLY MISSION
ITEM TO
ITEM
PROCEDURE
CAPABLE IF:
INTERVAL
CHECK/SERVICE
NO.
ARC WELDING MACHINE
ENGINE (cent)
Lubrication schedule is
Apply 2 drops of oil (item 1, appx D)
Cam Sleeve
13
Quarterly or
not followed.
to the felt (13) in the top of the cam
every 250
sleeve.
hours,
whichever
comes first
Apply 2 drops of oil (item 1, appx D)
Lubrication schedule is
Distributor Base
14
Quarterly or
not followed.
to the oiler ( 14) at the side of the dis-
every 250
tributor base.
hours,
whichever
comes first
Air cooling system
Semiannual- Air Cooling System
Remove air cooling system shrouds
15
(p. 4-12). Inspect air shrouds for
shrouds are cracked,
ly, more fre- Shrouds
have large enough dents
dents, cracks, or missing hardware.
quently under
or contain debris that
dusty condi-
Clean out any dirt and debris from
would impede air circu-
tions
shrouds and cylinder head fins. Re-
place any missing hardware Notify
lation, or if any attach-
ing hardware is stripped
direct support maintenance to pound
out any large dents.
or missing.
High temperature safety
16
High Temperature
Semiannual-
Check high temperature safety switch
ly
Safety Switch
switch is inoperative.
(p. 23) and wiring for shorts, frayed
insulation, and loose or corroded con-
nections. Remove corrosion with ex-
tra fine sandpaper and tighten any
loose connections. Notify direct sup-
port maintenance if high temperature
safety switch is inoperative.
ARC WELDING MACHINE
POWER UNIT
1
1
4-2.4
Change 1
