C.E. Niehoff & Co. C180etc Installation

1. Install alternator with cover oriented in a position
that allows best vertical air flow through fins on
anti-drive end. See Figure 1 and 2:

a. C180-1, C180-2, and C181-1 units are shipped

with pulley/fan, f lat washer, and nut installed.

b. C180 and C181 units are shipped with shaft

collar, flat washer, and nut. Remove and
discard shaft collar. Install pulley/fan and
furnished flat washer. Torque furnished nut to
68 Nm/50 lb. ft.

c. Use Grade 5 flange bolt and locking type flange

nuts to mount alternator. Self-locking type
screw is required to clamp up belt adjusting
bracket. Tighten the adjusting bracket before
tightening alternator mounting bolts. Torque
12mm x 1.75 mounting bolts to 50 Nm/ 37 lb. ft.

d. Follow vehicle manufacturer’s recommenda-

tions for belt tension.

2. Connect alternator and rectifier/regulator:

• C180-1—see page 2

• C180-2—see page 3

• C181-1—see page 4

• C180 and C181 alternators are replacements for
their corresponding dashed numbered alterna­ tors. Follow appropriate instructions listed above.

C180-1 Alternator w/ A8-206 Rectifi er-Regulator
C180-2 Alternator w/ A8-207 Rectifi er-Regulator
C181-1 Alternator w/ A8-208 Rectifi er-Regulator

C180/C181 Alternators

Installation Instructions

Mounting lugs (2)

To rectifier-regulator

C181-1

C181

C180-2

Figure 1 - C181-1/C181 Alternator Details

Mounting lugs (2)

To rectifier-regulator

C180-1

C180

Page 1 of 4

Figure 2 - C180-2/C180-1/C180 Alternator Details

II162A

C180-1 Alternator

w/ A8-206 Rectifi er-Regulator

1. Install rectifier-regulator assembly in location
determined by customer, using hardware and
torque specified by customer.

2. Remove shipping spacers from both sides of
rectifier-regulator.

3. Connect rectifier-regulator to alternator
with wiring conduit shown in
Figure 3 and 4.

4. Output conduit supplied by customer
connects rectifier-regulator with
customer circuit and consists of
B+ and B– output leads plus
R terminal lead if used.

5. R circuit current: 3 A max
Square wave signal: 0-30 V
Alternator speed formula: RPM=f(Hz)•10

6. Alternator is configured for self­energization. Regulator brown wire
is connected to R circuit. If external
energize is required, remove brown
wire between R terminal and module
terminal A. Connect energize signal,
which must open when alternator shaft
is not rotating.

7. Series connected isolation diode in the B+ circuit is
not permissible.

8. When wiring inside rectifier-regulator cover is
complete, re-install cover and torque hardware
to 5.4 Nm/48 lb. in.

See step 2.
M25 x 1.25 pipe thread
for connecting output
conduit assembly

To alternator

Figure 3 - A8-206 Rectifier-Regulator Cover Connections

Page 2 of 4

Figure 4 - C180-1/A8-206 Component Interconnect Diagram

II162A