Lincoln Electric IM850-A Welder User Manual


 
D-1
MAINTENANCE
D-1
POWER FEED 10S
SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
• Only Qualified personnel should
perform this maintenance.
• Turn the input power OFF at the
disconnect switch or fuse box
before working on this equipment.
Do not touch electrically hot parts.
ROUTINE MAINTENANCE
Check weld cables, control cables and gas hoses for
cuts.
Clean and tighten all weld terminals.
Inspect and clean drive rolls and inner wire guide
and replace if worn.
PERIODIC MAINTENANCE
Every six months check the motor brushes. Replace
them if they are less than 1/4" long.
Every year inspect the gearbox and coat the gear
teeth with a moly-disulfide filled grease. DO NOT
use graphite grease.
CALIBRATION SPECIFICATION
All calibration is factory set on the Power Feed 10S.
To verify the wire feed speed:
Press the INCH DOWN switch and adjust the wire
feed speed to 100 in/min (2.54m/min).
Measure the actual wire feed speed with a calibrated
wire feed speed tachometer.
The measured wire feed speed should be within ±2%
of the set value.
SENSE LEAD FUSE
There should never be any current flowing through
the sense leads! There is a fuse located in the sense
lead circuit that is mounted in the wire drive
Connection Box which protects the sense lead circuit
from weld current due to incorrect configuration. If this
fuse ever opens, check the sense lead configuration to
ensure proper connections. The fuse must be
replaced with a comparable fuse with a rating of less
than 1 amp before welding. The fuse being open or
missing would have the same effect on the welding as
having a disconnected sense lead.
WARNING