C.E. Niehoff & Co. 100 User Manual

C. E. Niehoff & Co

.

BRUSHLESS ALTERNATORS

Series 100 Alternators

Voltage Regulator Upgrade

Installation Instructions

CAUTION

This symbol is used in these instruc-

tions to indicate presence of hazards
that will or can cause minor personal injury or property
damage.

100 Series – A1-115, A1-125, A1-126, A1-127, A1-150,
A1-151, A1-160, A1-161, A1-163, A1-164, A1-165
C127, C166

N1028, N1029, N1030, N1034, N1035, N1041, N1042,
N1043, N1046, N1051, N1052, N1053, N1055, N1056,
N1058, N1059, N1060, N1061, N1062, N1063, N1065,
N1066, N1067, N1068, N1071, N1072, N1074, N1087,



N1088

, N3035, N7083





,



1. Remove alternator cover and existing voltage

regulator. Also remove heat sink from front of
alternator.

2. From rear of alternator, feed non-crimped end of

new green wire through slot near R terminal on
new regulator.

 A1-165 and N1088 — green jumper wire
is not required. Connect black E lead from
shell E terminal to R terminal of new regula­tor. Y terminal connection is not used.

3. Cut wire to proper length. Install sleeve, strip

wire, then crimp and solder larger terminal to
end of wire.

4. Re-install heat sink, connect new green wire
to phase terminal closest to output terminal. Do
not attach this wire to phase terminal with more
than two wires already attached.

5. Install new regulator on alternator and finish
wiring as shown in Figure 1.

6. At rear of alternator, attach new green wire to
back of R terminal.

7. On INSIDE of alternator cover, use supplied
template (II0005A) to cut new opening in cover:

a) Drill 1/8” pilot hole, then 9/16” hole.

b) Deburr new hole to prevent damaging

new switch on new circuit board.

8. Re-install alternator cover.

Voltage Select Switch Position

A2-436 and A2-437 Regulators
Position 1 13.8 V
Position 2 14.2 V
Position 3 14.6 V
Position 4 14.6 V

Voltage Selector Switch

A2-436 regulator with light terminal –

Light Relay

L Terminal

(brown wire)

R Terminal

(new green wire)

➛

➛

Field – Terminal

➛

➛

(white wire)

B+ Terminal

(red wire)

➛

B– Terminal

Y Terminal

(brown wire)

CAUTION

to touch alternator cover upon
reassembly. Replace existing terminal
with smaller terminal included in package.
Install sleeve, then crimp and solder smaller
terminal to wire.

Do not allow
Y terminal

➛

➛

Figure 1 - Series 100 Wiring

C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline [phone]

(white wire)

II0004BPage 1 of 1