C.E. Niehoff & Co. A1-102/A1-104 Installation - Manual

II163A Page 1 of 2
A1-102/A1-104 Alternators
Installation Instructions
Alternators intended for marine use must be installed in conformance with TITLE 33 CFR PART 183
SUBPART I - ELECTRICAL SYSTEMS.
1. MOUNT FAN AND PULLEY (Figure A).
2. MOUNT AND CONNECT REGULATOR (Figures B and C).
Torque to 50 ft. lbs. using locknut and hardened washer (A1)
supplied on alternator shaft.
Position regulator plug and secure regulator with screws (B1)
provided in regulator package. Regulator plug must be securely
held in place by regulator (B2).
Connect alternator plug to regulator plug (C1). b.
3. POSITION GROUND LINK (Figure C).
Units are shipped with the ground link installed for negative
ground as shown (C2). Reverse connections for positive ground
as indicated by dotted line (C3).
4. INSTALL ALTERNATOR (Figure A).
Attach belt adjusting bracket with bolt (A2) included in parts
package.
a.
a.
Insert mounting bolt and hand tighten nut (A3). Bolt should be
new and SAE Grade 5 or better. Nut should be self locking or
coated with "Loctite Lock and Seal" or eqivalent.
b.
5. SET BELT TENSION (Figure A).
On engines where the belt drives only the alternator, use a belt
tension gauge and set tension at 40 to 50 lbs. New belts should
be set at 75 lbs. On engines where the belt also drives other ac-
cessories, consult manufacturer's specifications. If belt tension
gauge is not available, set tension so that the fan cannot be turned
by hand. CAUTION: DO NOT SET TENSION TOO HIGH AS
THIS WILL CAUSE PREMATURE BEARING FAILURE.
Tighten bolt (A2) on belt adjusting bracket. Torque to 17 ft. lbs.
Tighten mounting bolt (A3). Torque to 35 ft. lbs.
a.
b.
c.
WIRING
CAUTION: Connecting the alternator improperly can cause serious damage.
1. For negative ground systems, connect existing battery wire to "BAT+" (D1) on alternator. For positive ground systems, connect battery wire
to "BAT-" on alternator. Be sure ground link is positioned correctly (C2 or C3).
2. On negative ground applications where a warning light is used, connect wire from "R" (D2) terminal on the alternator to the A2-250 relay
(D3).
NOTE: For isolated ground applications, discard the ground link. Attach both the positive and negative leads directly to the alternator.
INSTALLATION