TM 9-4940-549-14&P
(2) Raise the brushes from both sliprings and the exciter commu-
tator.
104 and 105. If the resistance is greater than 10% above or
over 65 ohms, the field winding is faulty and the field frame
must be removed for further testing.
and any one of the field leads. A resistance reading of less
than 0.5 megohm indicates faulty insulation and the field frame
must be removed for further testing.
e.
(1) Tag and disconnect shunt field leads at terminal boards DW4004
and DW4005.
A resistance reading of more than 5% above 27.5 ohms indicates
a faulty winding and the field frame must be removed for fur-
ther testing.
frame and any one of the field leads. A resistance reading of
less than 0.5 megohm indicates faulty insulation and the field
frame must be removed for further testing.
13-7. DYNAMOTOR-WELDER WORK TABLE.
a.
Removal. Remove seven bolts, lockwashers, and nuts, that secures
the work table to lathe table and van body.
b.
Cleaning , Inspection, and Repair.
(1) Clean the table and all parts with an approved cleaning solvent
and dry thoroughly.
(2) Inspect for cracks, breaks, warpage, and other damage.
(3) Weld minor breaks and straighten warpage and bent table sup-
ports if feasible.
(4) Replace defective parts or table that is damaged beyond repair.
Installation.
c.
13-8. END
COVERING AND
BEARING CAP.
Removal.
a.
(1) Remove dynamotor-welder end wrappers.
(2) Remove end cover and bearing cap as illustrated in figure 13-6.