Onan BF Series User Manual

STARTING SYSTEM
The BF Welder is equipped with an American Bosch
electric starter. Normally, the starter requires little or
no service other than possible brush replacement. If
the starter should require major service or overhaul,
the following information is provided.
STARTER DISASSEMBLY
1.
2.
Remove the thru-bolts and separate the end gap,
housing and armature.
Disassemble th'e drive assembly and the drive end
cap by loosening the self-locking nut. See Figure
14.
THRU-BOLT
ARMATURE
ASSEMBLY
COMMUTATOR
FIGURE 14. STARTER EXPLODED VIEW
BRUSH REPLACEMENT
If brushes are worn to less than .35 inch, replace them
with factory recommended brushes (Figure 15).
Other brushes may appear the same but have entirely
different electrical characteristics.
GROUNDED ARMATURE TEST
Use a test lamp set for detecting grounds in the
armature. Touch one probe to the commutator and
the other probe to the core. If the lamp lights, the
armature is grounded and must be replaced.
WEAR LIMIT —j-
.35"
_L
FIGURE 15. STARTER BRUSH WEAR LIMIT
SHORT CIRCUIT TEST
Use a growler for locating a short in the armature.
Place the armature in the growler and hold a thin steel
blade (eg., hacksaw blade) parallel to the core and
just above it while slowly rotating the armature. A
shorted armature causes the blade to vibrate and to
be attracted to the core. If the armature is shorted,
replace it.
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Onan BF Series Specifications

General

Brand	Onan
Model	BF Series
Category	Welding System
Language	English