Drive Motor 24 Volt
PS S1.1 1700
F-code Section C-code
Version no T-code
001 OE35
© BT Products
73
Service Manual 1997-10-21
(see illustration) using a steel strip or hacksaw blade to
locate any
shorted windings
.
Check for shorted windings by slowly rotating the
armature in the growler while holding the strip or blade
so that it passes over each armature core slot. If a
winding is shorted, the strip or blade will vibrate and
the blade will get hot.
5. Check commutator bars for any signs of burning. If
deep burned sections are evident, either in the brush
track or on the riser ends of the commutator bars, an
open or short circuit in the armature windings is
indicated.
2.6. Frame and Field Assembly
Check the condition of all insulation. If the insulation on the
field coils appears blackened or charred, the serviceability of
the coils is questionable. Burned or charred insulation is a
result of coil overheating due to overloading conditions,
grounded or shorted coil windings. Check condition of all
other insulation such as brush rigging, under coil connections
and around terminal studs.
2.6.1. Testing
Frame and Field Assembly
After thorough inspection, the Frame and Field Assembly
should be checked for grounded, open or shorted circuits.
Grounded and open circuits can be checked using a test light.
Most commercial growlers incorporate a test light as shown in
opposite illustration.
Grounded Circuit
Touch one test lead to a clean bare metal spot on the
frame and check all terminals with the other lead. If a
NOTE:
If the armature has been turned and
undercut prior to testing, check for and
remove any copper buildup or filings
between commutator bars and at the
commutator riser. This condition will
cause an armature to check shorted and
usually results from a dull undercutting
tool.
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