C.E. Niehoff & Co. N1224-1 thru -6 Installation - Manual

II108C
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N1224-1, -5, -6 Alternator w/N3221 Regulator
N1224-2 Alternator w/N3229 Regulator
N1224-3, -4 Alternator w/N3232 Regulator
N1224 Alternator
Installation Instructions
This symbol is used to indicate
presence of hazards that can cause
minor property damage.
CAUTION
Install alternator as shown in Figure 1:
Slip bushing located in rear mounting
foot must be securely tightened against
alternator mounting bracket on engine.
Failure to do so can result in broken
mounting feet or broken upper mounting
bracket.
Figure 1 - Alternator Installation Details
CAUTION
1. Units without pulleys are shipped with shaft collar,
disc spring washer, and nut. Remove shaft collar.
Install pulley (specified by customer), disc spring
washer, and nut. Torque nut to 163 Nm/120 lb. ft.
2. Use hardened washers between aluminum surfaces
and mounting bolt heads and nuts. Torque mounting
bolts as shown in Figure 1.
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
14 V B+ terminal stacking order:
—10 mm x 1.5 bolt
—disc spring washer
—customer 14 V output terminal
Torque to 15 Nm/11 lb. ft.

Slip bushing must be tightened
against bracket —
see “CAUTION” above


10 mm x 1.5 x
20 mm deep,
mounting bolt
metric grade 8.8
or higher, torque to
34 Nm/25 lb. ft.
3. All cabling, wiring or conduit must be supported
within 300 mm/12 in. of termination on alternator.
4. Choose wire gauge for B+ and B– cables capable of
handling maximum alternator output with minimum
voltage drop.
5. N1224-1 thru -6: Regulator was shipped as factory-
installed on original alternator. If alternator was
replaced, re-install regulator on alternator and
torque mounting screws to 8.5 Nm/75 lb. in.
N1224: Install regulator as specified by customer.

Mounting bolt, metric grade 8.8 or higher,
torque to 88 Nm/65 lb. ft. (2 places)

28 V B+ terminal
stacking order:
—10 mm x 1.5 bolt
—disc spring washer
—customer 28 V output
terminal
Torque to 15 Nm/
11 lb. ft.

B– terminal stacking order:
—10 mm x 1.5 bolt
—disc spring washer
—fl at washer
—customer ground terminal
Torque to 15 Nm/11 lb. ft.
 J1939 Data
Connector
   
AC terminal stacking order:
—6 mm nut
—disc spring washer
—customer specifi ed terminal
Torque to 3.4 Nm/30 lb. in.
E terminal stacking order:
—5 mm nut
—disc spring washer
—customer specifi ed terminal
Torque to 3.4 Nm/30 lb. in.

Alternator-to-
regulator harness