Lincoln Electric SAM400 - Manual (Page 22)

D-1 MAINTENANCE D-1
ELECTRIC SHOCK can kill.
● Do not touch electrically live parts
such as output terminals or inter-
nal wiring
ENGINE EXHAUST can kill.
● Use in open, well ventilated areas
or vent exhaust outside
MOVING PARTS can injure.
● Do not operate with doors open or
guards off
● Stop engine before servicing
● Keep away from moving parts
● Remove guards only when necessary and
replace when work requiring removal is com-
plete.
● Only qualified personnel should install, use, or
service this equipment.
ROUTINE MAINTENANCE
At the end of each day’s welding, refill the fuel tank to
minimize moisture condensation in the tank. Also, run-
ning out of fuel tends to draw dirt into the fuel system.
Check the crankcase oil level.
If the fuel supply runs out while the fuel pump is oper-
ating, air may be entrapped in the fuel distribution sys-
tem. If this happens, bleeding of the fuel system may
be necessary. See the engine instruction manual.
AIR FILTER
SAM650 only:
The air filter element is a dry cartridge type. It can be
cleaned and re-used; however, damaged elements
should not be washed or re-used. Remove loose dirt
from element with compressed air or water hose direct-
ed from inside out. Compressed Air: 100 psi maximum.
The filter should never be removed while the engine is
running.
SAM400 only:
Inspect the oil bath air filter daily - more often in dusty
conditions. When necessary clean and fill the oil bath.
The filter should never be removed while the engine is
running.
PERIODIC MAINTENANCE
1. Blow out the welder and controls with an air hose at
least once every two months. In particularly dirty
locations, this cleaning may be necessary once a
week. Use low pressure air to avoid driving dirt into
the insulation.
2. The SAM400 current control reactor brushes are
self-lubricating and should not be greased. Keep the
contacts clean. This control should be moved from
maximum to minimum daily to prevent the controls
from sticking.
3. See the engine Instruction Manual for periodic
engine maintenance information. Change the
crankcase oil at regular intervals using the proper
grade of oil as recommended in the engine operat-
ing manual. Change the oil filter in accordance with
the instructions in the engine operating manual.
When the filter is changed add one quart of oil to
the crankcase to replace the oil held in the filter dur-
ing operation.
4. Belts tend to loosen after the first 30 or 40 hours of
operation. Check the cooling fan belt and tighten if
necessary. DO NOT OVER TIGHTEN.
BEARING MAINTENANCE
This welder is equipped with a double-shielded ball
bearing having sufficient grease to last indefinitely
under normal service. Where the welder is used con-
stantly or in excessively dirty locations, it may be nec-
essary to add one-half ounce of grease per year. A pad
of grease one inch wide, one inch long and one inch
high weighs approximately one-half ounce. Over
greasing is far worse than insufficient greasing.
When greasing the bearings, keep all dirt out of the
area. Wipe the fittings completely clean and use clean
equipment. More bearing failures are caused by dirt
introduced during greasing than from insufficient
grease.
SAM400 & 650
WARNING