(2)
Connect the two generator field leads to the exciter armature as follows:
a.
Connect lead with ring type terminal with screw provided to the rear mounting plate (“A”, Fig.
2).
b.
Connect the other field lead to the three leads coming off of the exciter armature windings
(“X”, Fig. 2). Use parallel splice connector, crimp and solder for a good connection.
c.
Insulate with sleeving material or wrap with electrical tape.
(3)
Install the Machine Key
a.
Clean the machine key thoroughly. All mounting surfaces must be free of rust, corrosion, oil,
grease, etc.
b.
Apply
LOCQUIC
primer, No. 47-56 grade T to
SIDES
of machine key. Do not overprime. A
thin film is best. Allow to dry three to four minutes.
c.
Apply a thin coating of
LOCTITE
, No. 242 adhesive to
SIDES
of keyways in shaft and
armature. Be certain to remove any excess from mounting surfaces on shaft and bore of
armature.
NOTE:
Application of “Loctite” is to compensate for any looseness in machine key and keyway (up to
0.005 inch). Manufacturers of
LOCTITE
and other recommended products are listed below.
When exciter armature removal is for the replacement of bearings and no kit is involved, be sure
that
LOCTITE
No. 242 is recommended, which is a milder adhesive than that recommended in
the manual.
When kits are involved, the correct grade of
LOCTITE
is included in the Kit.
The application of
NEVER-SEEZ
to the shaft and armature bore is
NOT
recommended because
there is a danger that it may mix with and contaminate the
LOCTITE.
Application of
NEVER-SEEZ
will be at the customer’s risk.
LOCTITE
can lose its adhesive and tightening
properties if contaminated by rust preventatives, oil, or other lubricants and antirust products.
d.
Apply
LOCTITE
, No. 242 to
SIDES
of new type threaded machine key. A thin film 0.005 to
0.010 inch thick is adequate and desirable.
e.
Ensure keyways in the generator armature shaft and exciter armature are aligned.
f.
Insert
UNTHREADED
end of key in keyways, then tap lightly until threaded end is flush with
end of shaft.
(4)
Secure the exciter armature on generator shaft with the 1/2-13 cap screw.
Allow at least 6 hours for complete cure and set up of Loctite before operating
machine.
Recommended Products Manufacturers
•
“LOCQUIC” No. 47-56, Primer Grade T
•
“LOCTITE” No. 40-31, Retaining Compound, Manufactured by Loctite Corporation,
Newington, Connecticut 06111
•
“NEVER-SEEZ” No. NSBT-8 (8 oz. can), Manufactured by Never-Seez Compound
Corporation, Broadview, Illinois 60153
•
“NOCO10" Varnish No. T-211 (clear, air dry), Manufactured by Sterling Division of
Reichhold Chemical Incorporated, Marysville, Pennsylvania 17053
CAUTION
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
November 27/1997
Chapter 3-1
Page 7
