Hobart Pipeliner Instructions Manual page 39

PART THREE - MAINTENANCE
Hard Starting
42. WELDING GENERATOR
Arcing at brushes of weld
ing generator
Pails to generate rated
voltage
Generates less than 10V
Excessive speed
Speed too low
Too sensitive
Will not idle
Sluggish response
No-load surge
COOLING SYSTEM OVERHEATING
Fluid-flow blocked
T-964C
Defective magneto or dis­
tributor
Impulse spring broken
Defective brush at dis­
tributor
Dirty.or rough commutator
High or side mica
Worn brushes
Brushes stuck in holders
High commutator bar
Open-circuit in armature
Interpole shorted or
grounded
Brushholder loose
Engine speed too slow
Dirty commutator
Worn brushes or no spring
tens ion
Shorted armature coils
One or more shunt-field
coils shorted
Brushholder setting incor­
rect
Open-circuit in field coil
Engine speed too slow
Defective rheostat or bad
riveted connection
Defective male and/or fe­
male receptacle
Defective wiring
Loss of residual magnetism
Improper adjustment
Improper adjustment
Eyebolt maladjusted
Governor-to-carburetor rod
sticking
Ball joints in rod stick­
ing
Play or binding in rod.
Set-screw-maladjusted
Plugged radiator or engine
jacket passages
Thermostat not opening
Collapsed or rotted hose
Test coil, condenser, if
neither is bad replace mag­
neto or distributor
Replace magneto
Replace brush and spring
Clean and turn commutator
Undercut commutator
Replace brushes
Clean brushes and check for
size
Turn commutator
Repair or replace armature
Replace insulation
Tighten brushholder at prop­
er setting
Set governor to maintain a
speed of 1800 rpm under
load
Clean commutator
Replace brushes, set springs
to proper tension
Replace armature
Replace field coils
Adjust to correct setting
Replace field coil
Increase to 1800 rpm no load
Replace or repair
Replace or repair
Repair wiring
Excite fields temporarily
Re-set main adjusting screw
See above
Re-set eyebolt adjustment
Pree-up or replace rod
See above
Re-adjust, one turn at a
time
Clean by boiling soda solu­
tion and/or reverse flush­
ing
Replace engine thermostat
Replace hose
27